{"product_id":"eunorau-specter-s-4","title":"Eunorau SPECTER-S 4.0 Full-Suspension Mid-Drive Fat eBike (Hunter X9)","description":"\u003cstyle\u003e.rt-flow{--rt-ink:#111;--rt-sub:#555;--rt-line:#e8e8e8;--rt-accent:#c8102e;--rt-good:#0a7d3f;--rt-warn:#b3261e;font-family:inherit;color:var(--rt-ink);line-height:1.55;max-width:var(--page-width,1900px);margin:0 auto;padding-inline:clamp(0.5rem,1vw,1rem);}\n.rt-flow *{box-sizing:border-box;}\n.rt-flow h2{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:3.5rem 0 1rem;}\n.rt-flow h3{font-size:1.25rem;font-weight:700;margin:0 0 .6rem;}\n.rt-answer{max-width:900px;margin:0 auto 2.5rem;padding:1.5rem 1.75rem;border:1px solid var(--rt-line);border-left:4px solid var(--rt-accent);border-radius:14px;background:#fcfcfc;}\n.rt-answer p{margin:0;font-size:1.1rem;color:var(--rt-ink);}\n.rt-answer 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.75rem;font-size:.9rem;line-height:1.35;}\n.rt-flow table.rt-compare td{padding:.32rem .9rem;font-size:.92rem;}\n.rt-flow table.rt-compare tr{margin:0 0 .7rem;}\n.rt-flow ol.rt-footnotes li{margin:.25rem 0;}\n}\n@media(min-width:641px){\n.rt-flow ul.rt-stats{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));width:100%;margin-left:0;}\n.rt-flow\u003eul.rt-stats{max-width:900px;}   \n.rt-flow ul.rt-stats\u003eli{border-right:1px solid var(--rt-line);border-top:0;}\n.rt-flow ul.rt-stats\u003eli:last-child{border-right:0;}\n}\n@media(min-width:801px){.rt-flow .rt-tablewrap:not(.rt-tablewrap--compare){max-width:760px;}}\n.rt-flow blockquote.rt-quote{max-width:900px;margin:1.25rem 0;padding:1rem 1.25rem;border:0;border-left:4px solid var(--rt-accent);background:#f7f7f7;border-radius:0 12px 12px 0;font-style:normal;quotes:none;}\n.rt-flow blockquote.rt-quote::before,.rt-flow blockquote.rt-quote::after{content:none;display:none;}\n.rt-flow blockquote.rt-quote,.rt-flow blockquote.rt-quote p{text-align:left;font-weight:400;letter-spacing:normal;text-transform:none;font-family:inherit;}\n.rt-flow blockquote.rt-quote p{margin:0 0 .5rem;font-size:1rem;font-style:normal;line-height:1.6;color:inherit;}\n.rt-flow blockquote.rt-quote p.rt-quote__src{margin:0;font-size:.85rem;color:var(--rt-sub);}\n.rt-flow .rt-cover{margin:0 0 1.75rem;padding:0;}\n.rt-flow .rt-cover img{display:block!important;width:100%!important;height:auto!important;max-width:100%!important;margin:0!important;border-radius:20px;box-shadow:0 24px 60px -28px rgba(0,0,0,.35);}\n@media(min-width:801px){.rt-flow .rt-cover{max-width:900px;margin-left:0;margin-right:auto;}}\n.rt-flow .rt-figure{margin:1.5rem 0 1.75rem;padding:0;max-width:640px;}\n.rt-flow .rt-figure img{display:block!important;width:100%!important;height:auto!important;max-width:100%!important;margin:0!important;border-radius:16px;box-shadow:0 18px 44px -26px rgba(0,0,0,.35);}\n.rt-flow .rt-figure figcaption{margin:.65rem 0 0;font-size:.92rem;line-height:1.5;color:var(--rt-sub);}\n.rt-flow .rt-cta__alt{margin:.5rem 0 0;font-size:.9rem;line-height:1.5;color:var(--rt-sub);}\n.rt-flow .rt-cta__alt a{white-space:nowrap;}\u003c\/style\u003e\u003cdiv class=\"rt-flow\"\u003e\n\u003cp class=\"rt-hook\"\u003eA 1,000 W Bafang mid-drive that pulls through an 11-speed, on a full-suspension frame with 4-inch tires.\u003c\/p\u003e\n\u003cfigure class=\"rt-cover\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_7.jpg?v=1790835185\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_7.jpg?v=1790835185\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_7.jpg?v=1790835185\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_7.jpg?v=1790835185 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Moon Black, drive-side profile\" width=\"1800\" height=\"1800\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/figure\u003e\u003cdiv class=\"rt-answer\" id=\"quick-answer\"\u003e\n\u003cspan class=\"rt-q\"\u003eQuick answer\u003c\/span\u003e \u003cp\u003eThe Eunorau SPECTER-S 4.0 is a full-suspension fat-tire e-bike with a 1,000 W Bafang G510 mid-drive, a SRAM NX 11-speed, a 140 mm fork, four-piston hydraulic brakes and a removable 48 V 17.5 Ah LG battery. Eunorau rates it to 40 miles and 300 lb. $3,799, in stock, shipped free.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-cta\" style=\"text-align:center;margin:1.4rem 0 1.8rem\"\u003e\n\u003ca href=\"\/cart\/add?id=54073782141211\u0026amp;quantity=1\" style=\"display:inline-block;background:#c8102e;color:#fff !important;text-decoration:none;font-weight:750;padding:.9rem 2rem;border-radius:999px\"\u003eAdd the SPECTER-S 4.0, $3,799\u003c\/a\u003e\u003cp style=\"font-size:.85rem;color:#555;margin:.55rem 0 0\"\u003eMoon Black, 16\" frame · in stock, ships the week of October 5 · free shipping to the lower 48\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cul class=\"rt-stats\"\u003e\n\u003cli\u003e\n\u003cb\u003e1,000 W\u003c\/b\u003e\u003cspan\u003eRated, mid-drive\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e140 mm\u003c\/b\u003e\u003cspan\u003eFork travel\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e40 mi\u003c\/b\u003e\u003cspan\u003eRated range\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e300 lb\u003c\/b\u003e\u003cspan\u003eMax payload\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e83.7 lb\u003c\/b\u003e\u003cspan\u003eBike weight\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 id=\"what-you-get\"\u003eWhat you get with the SPECTER-S 4.0\u003c\/h2\u003e\n\u003cdiv class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_2.jpg?v=1790835185\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_2.jpg?v=1790835185\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_2.jpg?v=1790835185\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_2.jpg?v=1790835185 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Moon Black, front three-quarter view\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eMid-drive\u003c\/span\u003e\u003ch3\u003eThe motor works your gears\u003c\/h3\u003e\n\u003cp\u003eEunorau fits a Bafang G510 rated at 1,000 W, 48 V, at the cranks. Power goes through the chain and the 11-speed cassette, so on a steep climb you shift down and the motor gets the same mechanical advantage your legs do. The weight sits low and in the middle of the bike, between the wheels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-feat rt-feat--flip\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_5.jpg?v=1790835184\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_5.jpg?v=1790835184\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_5.jpg?v=1790835184\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_5.jpg?v=1790835184 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Army Green, front three-quarter view\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eFull suspension\u003c\/span\u003e\u003ch3\u003e140 mm up front, a shock at the back\u003c\/h3\u003e\n\u003cp\u003eAn EXPLORER fork with 36 mm stanchions gives 140 mm of travel, and an AO-38RC rear shock, 190 mm eye to eye, adds 50 mm at the back. With 26 × 4.0 inch Kenda K-1151 tires on 150 mm and 197 mm hubs, you have grip and give on gravel roads, sand, snow and rutted two-track.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-cta\" style=\"text-align:center;margin:1.4rem 0 1.8rem\"\u003e\n\u003ca href=\"\/cart\/add?id=54073782173979\u0026amp;quantity=1\" style=\"display:inline-block;background:#c8102e;color:#fff !important;text-decoration:none;font-weight:750;padding:.9rem 2rem;border-radius:999px\"\u003eAdd the SPECTER-S 4.0 in Army Green\u003c\/a\u003e\u003cp style=\"font-size:.85rem;color:#555;margin:.55rem 0 0\"\u003eArmy Green, 16\" frame · pick another color or frame below · ships the week of October 5\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_4.jpg?v=1790835185\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_4.jpg?v=1790835185\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_4.jpg?v=1790835185\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_4.jpg?v=1790835185 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Army Green, non-drive-side profile\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003e11-speed\u003c\/span\u003e\u003ch3\u003eSRAM NX, 11–42T\u003c\/h3\u003e\n\u003cp\u003eA SRAM NX trigger shifter and long-cage derailleur run an 11–42T PG-1130 cassette off a 40T chainring on 170 mm cranks. A shift sensor cuts the motor for an instant as you change gear, which spares the chain and cassette under a 1,000 W load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-feat rt-feat--flip\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_6.jpg?v=1790835185\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_6.jpg?v=1790835185\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_6.jpg?v=1790835185\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_6.jpg?v=1790835185 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Army Green, rear three-quarter view with the rack and tail light\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eStopping\u003c\/span\u003e\u003ch3\u003eFour-piston hydraulic brakes\u003c\/h3\u003e\n\u003cp\u003eHD-E620 four-piston hydraulic calipers on 180 mm rotors, front and rear. Four pistons per caliper give you a firmer, more controllable bite for long descents on a loaded fat bike.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-feat\"\u003e\n\u003cdiv class=\"rt-feat__media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_1.jpg?v=1790835184\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_1.jpg?v=1790835184\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_1.jpg?v=1790835184\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_1.jpg?v=1790835184 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Moon Black, rear three-quarter view with the rack and tail light\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"rt-feat__txt\"\u003e\n\u003cspan class=\"rt-feat__kicker\"\u003eBattery\u003c\/span\u003e\u003ch3\u003e48 V 17.5 Ah of LG cells, removable\u003c\/h3\u003e\n\u003cp\u003eThe pack is 13S5P of LG 3,500 mAh cells behind a 30 A BMS, in a lockable, removable down-tube case, and Eunorau rates it to 40 miles. It comes standard with the rack, full aluminum fenders, front and rear lights, an adjustable kickstand and platform pedals, so it is ready for the trailhead as it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003ePick your color and frame\u003c\/h3\u003e\n\u003cp class=\"rt-cta__alt\"\u003e\u003ca href=\"\/cart\/54073782141211:1\"\u003eMoon Black, 16-inch frame\u003c\/a\u003e · \u003ca href=\"\/cart\/54073782206747:1\"\u003eMoon Black, 18-inch frame\u003c\/a\u003e · \u003ca href=\"\/cart\/54073782173979:1\"\u003eArmy Green, 16-inch frame\u003c\/a\u003e · \u003ca href=\"\/cart\/54073782239515:1\"\u003eArmy Green, 18-inch frame\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"rt-src\"\u003eAll four are $3,799, in stock, and ships the week of October 5, 2026. In Eunorau's own photographs Moon Black reads as a slate blue-grey, and Army Green as an olive green.\u003c\/p\u003e\n\u003ch2 id=\"why-redtail\"\u003eWhy buy the SPECTER-S 4.0 from Redtail\u003c\/h2\u003e\n\u003cdiv class=\"rt-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eFree shipping to the lower 48\u003c\/h3\u003e\n\u003cp\u003eFree shipping on every electric bike within the contiguous United States. The SPECTER-S 4.0 is in stock and ships the week of October 5, 2026. Most e-bikes arrive within 5–10 business days after dispatch, with tracking emailed at dispatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003ePay over time\u003c\/h3\u003e\n\u003cp\u003eShop Pay offers $3,799 as 3 monthly payments of $1,298.12, 6 of $661.15 or 12 of $342.89, at 15% APR.\u003c\/p\u003e\n\u003cp class=\"rt-fine\"\u003ePayment options through Shop Pay Installments are subject to an eligibility check and are provided by these lending partners: affirm.com\/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers: affirm.com\/licenses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eWarranty, and we file the claim\u003c\/h3\u003e\n\u003cp\u003eEunorau warrants the frame for 10 years and the battery, motor and electrical components for 24 months against manufacturing defects. Our US support team files and tracks the claim with Eunorau for you. If the bike arrives damaged, note it with the driver and send us photos within 48 hours, and we file the carrier claim and arrange the repair or replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eUS support, before and after\u003c\/h3\u003e\n\u003cp\u003eAsk a person in the United States about fit, setup or anything on this page, before you order and after it arrives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rt-cta\" style=\"text-align:center;margin:1.4rem 0 1.8rem\"\u003e\n\u003ca href=\"\/cart\/54073782141211:1\" style=\"display:inline-block;background:#c8102e;color:#fff !important;text-decoration:none;font-weight:750;padding:.9rem 2rem;border-radius:999px\"\u003eBuy the SPECTER-S 4.0 now\u003c\/a\u003e\u003cp style=\"font-size:.85rem;color:#555;margin:.55rem 0 0\"\u003e$3,799 · free shipping · opens checkout\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"who-for\"\u003eWho the SPECTER-S 4.0 is for\u003c\/h2\u003e\n\u003cp\u003eChoose the SPECTER-S 4.0 if your riding leaves the pavement: fire roads, sand, snow, hunting ground or rough two-track, where full suspension and a motor that climbs through its gears pay off every ride.\u003c\/p\u003e\n\u003ch3\u003eTwo things to check before you order\u003c\/h3\u003e\n\u003col class=\"rt-check\"\u003e\n\u003cli\u003e\n\u003cb\u003eYour height, against the frame.\u003c\/b\u003e Eunorau recommends the 16\" frame for riders 5'3\"–6'3\" (160–190 cm). It publishes saddle height for both frames, 19.3–24 in (490–610 mm) on the 16\" and 21.3–26 in (540–660 mm) on the 18\", and leaves the 18\" rider-height cell blank. If you are at the tall end of that range, send us your height and inseam and we will match you to a frame before you order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHow far you ride.\u003c\/b\u003e Eunorau rates the 4.0 at up to 40 miles, or 52 miles combined with its optional 48 V 5 Ah second pack. If you want more from the box, the \u003ca href=\"\/products\/eunorau-specter-st\"\u003eSPECTER-ST 2.0\u003c\/a\u003e is rated to 80 miles with a second battery, on the same 1,000 W mid-drive platform, at $2,999.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cfigure class=\"rt-figure\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_3.jpg?v=1790835185\" srcset=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_3.jpg?v=1790835185\u0026amp;width=600 600w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_3.jpg?v=1790835185\u0026amp;width=1000 1000w, https:\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_3.jpg?v=1790835185 1800w\" sizes=\"(max-width: 800px) 92vw, 720px\" alt=\"Eunorau SPECTER-S 4.0 in Army Green, drive-side profile\" width=\"1800\" height=\"1800\" loading=\"lazy\" decoding=\"async\" style=\"width:100%;height:auto\"\u003e\u003c\/figure\u003e\u003ch2 id=\"changed\"\u003eWhat changed from the SPECTER-S 3.0\u003c\/h2\u003e\n\u003cp\u003eThe 4.0 replaced the SPECTER-S 3.0 on Eunorau's own page in September 2026. The motor carries over: Eunorau's 3.0 page named it the \"Bafang G510(M620)\", and the 4.0 runs the G510. So do the 48 V 17.5 Ah main battery and the 190 mm rear shock with 50 mm of travel. What is new, in Eunorau's published figures:\u003c\/p\u003e\n\u003cdiv class=\"rt-tablewrap rt-tablewrap--compare\"\u003e\u003ctable class=\"rt-compare\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eSPECTER-S 3.0\u003c\/th\u003e\n\u003cth\u003eSPECTER-S 4.0\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrames\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003e17\" and 19\"\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003e16\" and 18\"\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFork\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003eEunorau inverted, 140 mm\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003eEXPLORER, 140 mm, 36 mm stanchions\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003eHydraulic disc, 180 mm\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003eHD-E620 four-piston hydraulic, 180 mm\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003eDP C010.CB\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003eDP C018.CB\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBike weight\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003e88.2 lb\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003e83.7 lb\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecond battery\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 3.0\"\u003eOptional 48 V 15 Ah\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003eOptional 48 V 5 Ah with a Type-C port\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003e3.0 figures: Eunorau's product page for the SPECTER-S 3.0 as archived by the Internet Archive on September 4, 2026. 4.0 figures: the same address, read on September 30, 2026.\u003c\/p\u003e\n\u003ch2 id=\"compare\"\u003eHow it compares with what else we sell\u003c\/h2\u003e\n\u003cdiv class=\"rt-tablewrap rt-tablewrap--compare\"\u003e\u003ctable class=\"rt-compare\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eSPECTER-S 4.0\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"\/products\/eunorau-specter-st\"\u003eSPECTER-ST 2.0\u003c\/a\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"\/products\/eunorau-fat-hs\"\u003eFAT-HS\u003c\/a\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003e$3,799\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e$2,999\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e$3,449\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e1,000 W Bafang G510 mid-drive\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e1,000 W Bafang M620 mid-drive\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e1,000 W Bafang M615 mid-drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFork\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003e140 mm, 36 mm stanchions\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e140 mm\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear shock\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003eAO-38RC, 190 mm\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003eDNM AO-38RC, 165 mm\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003eKS-388RL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e\u003cb\u003e26 × 4.0\"\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e27.5 × 3.0\"\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e26 × 4.0\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax payload\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e300 lb\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e300 lb\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e300 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated range\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-S 4.0\"\u003e40 mi (52 mi with the 5 Ah pack)\u003c\/td\u003e\n\u003ctd data-label=\"SPECTER-ST 2.0\"\u003e\u003cb\u003e80 mi with a second battery\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd data-label=\"FAT-HS\"\u003e\u003cb\u003e80 mi with a second battery\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003eEvery figure in this table is Eunorau's own, each read on that bike's product page on September 30, 2026; prices are ours, read the same day. Where another of our bikes is ahead on a row, the row says so and links to it.\u003c\/p\u003e\n\u003ch2 id=\"legal\"\u003eOwning the SPECTER-S 4.0 in your state\u003c\/h2\u003e\n\u003cp\u003eFederal law defines a low-speed electric bicycle at 15 U.S.C. § 2085(b): a two- or three-wheeled vehicle with fully operable pedals and \"an electric motor of less than 750 watts (1 h.p.)\", whose top speed on motor power alone, on a paved level surface with a 170-pound rider, is less than 20 mph.\u003c\/p\u003e\n\u003cp\u003eEunorau's quick specification lists this bike as \"Default Class 2\" and gives a manufacturer-defined display limit of up to 28 mph. Its rated motor output is 1,000 W, which is above the statute's \"less than 750 watts\", so plan to ride it where that is not the question: trail, ranch, private land and hunting ground.\u003c\/p\u003e\n\u003cp\u003eStates set their own rules on top of the federal definition, and most use a three-class system that decides where you can ride, whether a helmet is required and whether there is a minimum age. \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eOur state-by-state e-bike law guide\u003c\/a\u003e sets out what each one says.\u003c\/p\u003e\n\u003ch2 id=\"specs\"\u003eSPECTER-S 4.0 specifications\u003c\/h2\u003e\n\u003ch3\u003eElectronics\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMotor\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBAFANG G510 mid-drive motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMotor position\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eMid-drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMotor output\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e1,000 W at 48 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMain battery\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e48V 17.5Ah removable downtube battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMain battery cells\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eLG 3500mAh, 13S5P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBattery management system\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e30A BMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eLow-voltage protection\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e40.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCharge port\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eDC2.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eDisplay\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBAFANG DP C018.CB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCommunication protocol\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eUART\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eThrottle\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eThumb throttle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eShift protection\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eMotor cut-off shift sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOptional secondary battery\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e48V 5Ah, LG 5000mAh 21700 cells, 13S1P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOptional secondary-battery feature\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eType-C output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eManufacturer-defined display limit\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 28 mph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRange\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 40 miles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eExtended range - optional battery\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 52 mi combined with the optional 48V 5Ah pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMaximum payload\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e300 lb, including rider and cargo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eNet weight\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e83.7 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eFrame \u0026amp; Suspension\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFrame\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e6061 aluminum full-suspension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFrame size\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e16\" or 18\" (the frames sold and charted; Eunorau's specification row reads \"17 inches\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eWheel size\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e26 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront fork\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eEXPLORER suspension fork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront suspension travel\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFork stanchions\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront hub spacing\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear shock\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAO-38RC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear shock size\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e190mm eye-to-eye\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear suspension travel\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eDrivetrain\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eDrivetrain\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSRAM NX 1 × 11-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eShifter\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSRAM NX 11-speed trigger shifter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear derailleur\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSRAM NX 1 × 11 long cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCassette\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eSRAM PG-1130, 11–42T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eChain\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eKMC e11 Sport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eChainring\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e40T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCrank length\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e170mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCrank material\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eBrakes\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBrake type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eFront and rear four-piston hydraulic disc brakes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBrake model\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eHD-E620\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront rotor\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear rotor\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eWheels \u0026amp; Tires\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eTires\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eKenda K-1151, 26 × 4.0 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRims\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e26 × 4.0-inch 6061 aluminum single-wall rims\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront hub\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e12G × 36H, M15 × 150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear hub\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e12G × 36H, M12 × 197mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSpokes\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eCockpit \u0026amp; Equipment\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eEunorau's figure\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eHandlebar\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e700mm aluminum riser handlebar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eHandlebar rise\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eStem\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e90mm aluminum stem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eGrips\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e130mm dual-lock grips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSeatpost\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e31.6 × 280mm aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePedals\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e9\/16-inch platform pedals with reflectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFront light\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e6–48V DC light with reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear safety equipment\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eRear light with reflector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRear rack\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eFenders\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eFull aluminum front and rear fenders\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eKickstand\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAdjustable aluminum kickstand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eGeometry and rider fit\u003c\/h3\u003e\n\u003cdiv class=\"rt-tablewrap\"\u003e\u003ctable class=\"rt-spec\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e16\" frame\u003c\/th\u003e\n\u003cth\u003e18\" frame\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eA: Seat tube\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e16 in (406 mm)\u003c\/td\u003e\n\u003ctd\u003e18 in (457 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eB: Reach\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e18 in (457 mm)\u003c\/td\u003e\n\u003ctd\u003e18 in (457 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eC: Head tube\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e6.3 in (160 mm)\u003c\/td\u003e\n\u003ctd\u003e6.3 in (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eD: Chain stay\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e16.6 in (421.5 mm)\u003c\/td\u003e\n\u003ctd\u003e16.6 in (421.5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eE: Bracket height\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e14.2 in (360 mm)\u003c\/td\u003e\n\u003ctd\u003e14.2 in (360 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eF: Wheelbase\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e50.2 in (1274 mm)\u003c\/td\u003e\n\u003ctd\u003e50.2 in (1274 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eH: Top tube\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e25.4 in (645 mm)\u003c\/td\u003e\n\u003ctd\u003e25.4 in (645 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eI: Stack\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e24.3 in (618 mm)\u003c\/td\u003e\n\u003ctd\u003e24.3 in (618 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eK: Total length\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e79.7 in (2024 mm)\u003c\/td\u003e\n\u003ctd\u003e79.7 in (2024 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eSaddle height\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e19.3–24 in (490–610 mm)\u003c\/td\u003e\n\u003ctd\u003e21.3–26 in (540–660 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eRider height (Eunorau's)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e5'3\"–6'3\" (160–190 cm)\u003c\/td\u003e\n\u003ctd\u003eblank in Eunorau's chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"rt-src\"\u003eSource: Eunorau's published specification for the SPECTER-S 4.0, \u003cspan class=\"rt-addr\"\u003eeunorau-ebike.com\/products\/specter-s-hunter\u003c\/span\u003e, read on \u003ctime datetime=\"2026-09-30\"\u003eSeptember 30, 2026\u003c\/time\u003e from both the product record and the rendered specification and geometry chart.\u003c\/p\u003e\n\u003cp class=\"rt-src\"\u003eEunorau gives five of these rows in both US and metric units, and the table prints the US figure: Manufacturer-defined display limit is also given as approximately 45 km\/h; Range is also given as 64 km; Extended range - optional battery is also given as 83 km combined; Maximum payload is also given as 136 kg, including rider and cargo; Net weight is also given as 38 kg.\u003c\/p\u003e\n\u003ch2 id=\"faq\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhat changed from the SPECTER-S 3.0 to the 4.0?\u003c\/h3\u003e\n\u003cp\u003eNot the motor: Eunorau's 3.0 page named it the Bafang G510(M620), and the 4.0 runs the G510. The 4.0 brings 16\" and 18\" frames, an EXPLORER fork with 36 mm stanchions, four-piston HD-E620 brakes, the DP C018.CB display, an optional 5 Ah second pack with a Type-C port, and a lighter bike at 83.7 lb.\u003c\/p\u003e\n\u003ch3\u003eIs a mid-drive better than a hub motor?\u003c\/h3\u003e\n\u003cp\u003eFor climbing, usually yes. A mid-drive turns the cranks, so you can shift down and the motor works through the same gears you do, as Eunorau's own page explains. A hub motor pushes the wheel directly and is simpler. On steep, loose ground, you will feel the mid-drive's advantage.\u003c\/p\u003e\n\u003ch3\u003eIs the SPECTER-S 4.0 street legal?\u003c\/h3\u003e\n\u003cp\u003eIt depends on your state and on what it counts. Federal law (15 U.S.C. § 2085(b)) defines a low-speed electric bicycle as one with a motor of less than 750 watts, and this bike is rated at 1,000 W, although Eunorau lists it as Default Class 2. \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eOur state guide\u003c\/a\u003e has each state's rule.\u003c\/p\u003e\n\u003ch3\u003eHow far does the SPECTER-S 4.0 go on a charge?\u003c\/h3\u003e\n\u003cp\u003eEunorau rates it at up to 40 miles on the 48 V 17.5 Ah main pack, and 52 miles combined with the optional 48 V 5 Ah second pack. Expect less into a headwind, on sand or snow, up long climbs and near the 300 lb limit. For more range from the box, the \u003ca href=\"\/products\/eunorau-specter-st\"\u003eSPECTER-ST 2.0\u003c\/a\u003e is rated to 80 miles with a second battery.\u003c\/p\u003e\n\u003ch3\u003eIs the second battery included?\u003c\/h3\u003e\n\u003cp\u003eNo. Eunorau lists the 48 V 5 Ah secondary battery as an optional configuration, sold separately. Ask us before you order and we will tell you what fits your bike.\u003c\/p\u003e\n\u003ch3\u003eWhich frame size should I order?\u003c\/h3\u003e\n\u003cp\u003eEunorau recommends the 16\" frame for riders 5'3\"–6'3\" (160–190 cm) and publishes saddle height for both frames: 19.3–24 in (490–610 mm) on the 16\" and 21.3–26 in (540–660 mm) on the 18\". Its chart leaves the 18\" rider height blank. Send us your height and inseam, and we will match you.\u003c\/p\u003e\n\u003ch3\u003eHow much suspension travel does it have?\u003c\/h3\u003e\n\u003cp\u003e140 mm at the front from the EXPLORER fork, and 50 mm at the back from the AO-38RC shock, which is 190 mm eye to eye.\u003c\/p\u003e\n\u003ch3\u003eIs the battery removable?\u003c\/h3\u003e\n\u003cp\u003eYes. The 48 V 17.5 Ah pack sits in a lockable, removable down-tube case, so you can take it inside to charge or store it.\u003c\/p\u003e\n\u003ch3\u003eIs the SPECTER-S 4.0 a good hunting e-bike?\u003c\/h3\u003e\n\u003cp\u003eEunorau builds it for that job and names it the Hunter X9. You get Army Green paint, a rear rack, full fenders, 4-inch tires, full suspension, a 300 lb payload and a mid-drive that climbs through its gears. Check your state's rules for where you can ride it.\u003c\/p\u003e\n\u003cdiv class=\"rt-cta\" style=\"text-align:center;margin:1.4rem 0 1.8rem\"\u003e\n\u003ca href=\"\/cart\/54073782239515:1\" style=\"display:inline-block;background:#c8102e;color:#fff !important;text-decoration:none;font-weight:750;padding:.9rem 2rem;border-radius:999px\"\u003eOrder your SPECTER-S 4.0\u003c\/a\u003e\u003cp style=\"font-size:.85rem;color:#555;margin:.55rem 0 0\"\u003eArmy Green, 18\" frame · every option is linked above · ships the week of October 5\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"manuals\"\u003eManuals \u0026amp; documentation\u003c\/h2\u003e\n\u003cdiv class=\"rt-cards\"\u003e\n\u003cdiv\u003e\n\u003ch3\u003eThe document you need, from us\u003c\/h3\u003e\n\u003cp\u003eThe SPECTER-S 4.0 runs the BAFANG DP C018.CB display. Tell us which manual you want (display, motor, fork, shock or brakes) and we will send you our copy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eHelp with the build\u003c\/h3\u003e\n\u003cp\u003eIt arrives part-assembled with the tools you need. If you would rather not finish it yourself, a local bike shop can, and we will talk you through any step first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"after\"\u003eWhat happens after you order\u003c\/h2\u003e\n\u003cp\u003eThe SPECTER-S 4.0 is in stock and ships the week of October 5, 2026. Most e-bikes arrive within 5–10 business days after dispatch, depending on location. It ships in a freight box, part-assembled. Inspect it at delivery: damage, defects or a wrong item reported with photos within 48 hours are ours to fix, and we file the carrier claim.\u003c\/p\u003e\n\u003cdiv class=\"rt-cta\" style=\"text-align:center;margin:1.4rem 0 1.8rem\"\u003e\n\u003ca href=\"\/cart\/54073782206747:1\" style=\"display:inline-block;background:#c8102e;color:#fff !important;text-decoration:none;font-weight:750;padding:.9rem 2rem;border-radius:999px\"\u003eCheck out with the SPECTER-S 4.0\u003c\/a\u003e\u003cp style=\"font-size:.85rem;color:#555;margin:.55rem 0 0\"\u003eMoon Black, 18\" frame · $3,799 · opens checkout\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 id=\"reading\"\u003eFurther reading\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/blogs\/journal\/eunorau-ebikes\"\u003eour Eunorau brand guide\u003c\/a\u003e · \u003ca href=\"\/blogs\/journal\/best-electric-mountain-bikes\"\u003eour electric mountain bike guide\u003c\/a\u003e · \u003ca href=\"\/blogs\/journal\/electric-bike-laws\"\u003eour state-by-state e-bike law guide\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv class=\"rt-note rt-verify\"\u003e\n\u003cp\u003e\u003cb\u003eHow we verified this page.\u003c\/b\u003e Every specification was checked against Eunorau's published specification for this model (eunorau-ebike.com\/products\/specter-s-hunter), read on September 30, 2026 from both the product record and the rendered specification and geometry chart, and every figure that is arithmetic was recomputed. The federal definition quoted above is the Government Publishing Office's copy of 15 U.S.C. § 2085. Price, colors, shipping, warranty and Shop Pay terms were read the same day, and the price again on October 1, 2026.\u003c\/p\u003e\n\u003cp\u003eVerified by \u003ca href=\"\/pages\/milad-ghobadibeygvand\"\u003eMilad Ghobadibeygvand, BScN (Western University, 2014)\u003c\/a\u003e. Found something that does not match Eunorau's current page? Email \u003cspan class=\"rt-addr\"\u003esupport@redtailebikes.com\u003c\/span\u003e and we will correct it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Eunorau","offers":[{"title":"Moon Black \/ 16\"","offer_id":54073782141211,"sku":"EBSPTS416BKWD","price":3799.0,"currency_code":"USD","in_stock":true},{"title":"Army Green \/ 16\"","offer_id":54073782173979,"sku":"EBSPTS416GRWD","price":3799.0,"currency_code":"USD","in_stock":true},{"title":"Moon Black \/ 18\"","offer_id":54073782206747,"sku":"EBSPTS418BKWD","price":3799.0,"currency_code":"USD","in_stock":true},{"title":"Army Green \/ 18\"","offer_id":54073782239515,"sku":"EBSPTS418GRWD","price":3799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/8847\/1835\/files\/SPECTER-S4_7.jpg?v=1790835185","url":"https:\/\/redtailebikes.com\/products\/eunorau-specter-s-4","provider":"Redtail Ebikes","version":"1.0","type":"link"}