Eunorau SPECTER-S 3.0 Review 2026: Hunter X9

1000 W Bafang M620 · 300 lb payload · 28 mph published · 1,560 Wh in the box · $2,999 · verified August 29, 2026

Quick Answer — This Eunorau Specter S review covers the 3.0, sold as the Hunter X9: a $2,999 full-suspension fat-tire eMTB built around the torque-sensed 1000 W Bafang M620. Eunorau publishes the numbers its step-through sibling doesn't: 28 mph, a 300 lb payload, a 5'3"–6'4" rider range. Right now all three of the free gifts on Eunorau's own listing ship with it here too: the 48V 15Ah second battery, a 27.5×3" wheel set, and a single-speed conversion kit. That is $1,097 of equipment on a $2,999 bike, verified 29 August 2026. Two cautions before you pay: the "Class 3" label sits on a 1000-watt motor that California's e-bike definition — the model text this page reads — does not reach, and Eunorau publishes no geometry chart for either frame size.

What's on this page

• Who the SPECTER-S 3.0 is for
• How we verified this review
• Eunorau SPECTER-S 3.0 specifications
• The $1,097 gift stack, gift by gift
• Range: the 80-mile claim, run through its own arithmetic
• The motor, and what the gearing does with it
• Fit: strong numbers, missing chart
• The Mercer fit test
• The "Class 3" label against the statute
• Is the battery UL certified?
• The Eunorau Specter S review a forum asked for
• Warranty
• Ordering, shipping and support
• The honest ledger
• Who should buy it
• Before you buy: the checklist
• Limitations of this review
• The source register
• Frequently asked questions
• The bottom line

Who the SPECTER-S 3.0 is for

Eunorau sells this machine under two names: SPECTER-S 3.0 on the spec sheet, Hunter X9 on the trail.

Hunters, and riders whose riding looks like hunting: heavy loads, no pavement, long distances from the truck, terrain that punishes a rigid frame. Eunorau aims this machine there by name (the product page calls it the Hunter X9) and by build: 26×4.0" Kenda rubber, suspension at both ends, a mid-drive that climbs through the cassette, and a published 300 lb payload.

The season is the trigger. Fall scouting starts in September, and a bike bought now is broken in before opening day; a bike bought in November learns its trails in the snow.

Buy wrong and the cost is not the sticker: it is dragging an 88 lb machine that doesn't fit you, or a class problem at the trailhead gate. The published numbers, the free equipment, and one legal question settle the decision — all three are below, ahead of the crate.

The short version of who it is not for: anyone whose riding needs a 20 mph machine for path access, and anyone under about 5'3", the floor of Eunorau's own rider-height range — though the hardtail Hunter X7 we reviewed shares that floor with an easier mount and a $2,399 start.

Army Green, the colorway on our floor today. The other two, Safari and Moon Black, exist on Eunorau's page and are out of stock with us as of 29 August 2026.

How we verified this review

What we did. We archived Eunorau's live SPECTER-S 3.0 page on 29 August 2026 and read every figure from that deposit copy. We downloaded and opened all 78 images the page links, which is how we can say what the page does and does not publish. Both sibling pages, the R1-17 and R1-19 e-moto pages, and the statute were read from deposits the same day.

The spec block was diffed against every sibling before a word was written. The SPECTER-ST's page carries a spec block that belongs to Eunorau's R1 line; that finding is its own review. This page's block was checked row by row against both R1 pages: zero of its 30 rows appear on either. The figures here are this machine's.

The gifts were verified as gifts. Eunorau's accessories block prices all three at $0 beside the $2,999 bike (the strings are quoted in the gift section), and our own listing was updated the same day to match. Both listings were re-read live before publish.

What we computed. Pack energy, the consumption the range claim implies, the range bands, the gift arithmetic, and a five-field tally of what each sibling publishes. Script and dataset committed and re-runnable.

What we did not do. We have not ridden it. No handling, comfort or climbing verdict of our own appears below.

On the recall check. The CPSC recall service has now failed for three consecutive days. On 29 August its REST endpoint returned a success code wrapping an error record, which is worse than a refusal because it can masquerade as an answer. We do not know this brand's recall status and do not claim it is clear. Ask us before you order and we will run the check again and send you whatever it returns; the result will also be published here.

Where a fact has only one publisher (a manufacturer's specification, a statute's text), the citation ledger marks it SOLE-PUBLISHER instead of inventing a second source; every load-bearing claim that can be independently corroborated is.

Neutrality. Redtail sells this machine, and the free-gift bundle makes this page more commercial than most of our reviews. The honest ledger and the class section carry what does not flatter it. Corrections: corrections@redtailebikes.com.

Reviewed by the Redtail editorial desk. Verified 29 August 2026.

Eunorau SPECTER-S 3.0 specifications

Every figure below is from Eunorau's own SPECIFICATION and Components blocks, retrieved 29 August 2026. Unlike its step-through sibling, this page's spec block genuinely describes this machine — we checked it against every sibling page first.

Eunorau's own photo of the display, reading in mph. Its ST sibling's display photo reads km/h, so check the units setting on whichever one arrives.

The rear 180mm rotor. On a bike published at 28 mph and 300 lb of payload, rotor size is the spec to watch; the R1 e-motos this brand also sells run 203mm.

The DNM shock from the table's rear-shock row, published at 190mm with 50mm of travel — size and travel stated separately, the distinction its own sibling's sheet blurs.

The $1,097 gift stack, gift by gift

Eunorau's accessories block is headed "Free Gifts Included" and prices each gift at zero beside the $2,999 bike: the "Universal 48V15Ah Secondary Battery FREE $499.00", the 27.5×3" "Wheel Set For SPECTER-S FREE $399.00", and the "Single Speed Cassette Conversion Kit FREE $199.00".

Our listing carries the same three at the same $2,999, matched on 29 August 2026. Added up, that is $1,097, or 36.6% of the purchase price, and each piece changes what the bike is.

The second battery ($499) buys the range claim. Eunorau's spec row still labels this pack "Optional" — the accessories block is where the FREE price lives — and the 80-mile figure is written for two packs. With the second 720 Wh battery in the box, the figure describes the configuration delivered instead of an upsell; the range section runs the numbers.

The wheel set ($399) is a second personality. The bike ships on 26×4.0" fat rubber. The gift is a 27.5×3" wheel set, the same wheel format its SPECTER-ST sibling runs as standard. Fat wheels for sand, snow and soft ground; the narrower set when the season ends and the riding turns to hardpack and gravel. One frame, two setups, swap as the calendar demands.

The single-speed kit ($199) is the hunter's insurance policy. A derailleur is the most exposed part on a bike ridden through brush. The kit converts the drivetrain to a single speed: less to snag, less to bend, less to fail thirty miles from the truck. Between the SRAM NX 11-speed and the single-speed conversion, the machine covers both philosophies of backcountry reliability.

One caveat on the stack: gift programs are promotions, and promotions end. Both listings carried all three on 29 August 2026; if you are reading this later, ask us what is in the box today before you order.

Range: the 80-mile claim, run through its own arithmetic

Eunorau's range row reads "80 miles (48V 17.5Ah LG Cells + Second Battery 15Ah)". The brackets are doing the work: that is a two-battery figure, and with the second pack now in the box, it describes the bike as delivered.

Computed from Eunorau's published pack sizes; method in How we verified.

Read the claim as a two-pack number and it is honest arithmetic at a gentle 19.5 Wh per mile. Ride only the main pack and the same rate gives about 43. Ride it loaded, uphill, on soft ground (the riding this machine is named for) and the realistic bands look like this:

A loaded hunter on broken ground should plan the day around the 45-to-62-mile rows for the pair — the 840 Wh main pack covering 24 to 34 of those miles and the second pack the rest, all computed from Eunorau's own pack sizes. The second battery is what turns a nervous glance at the gauge into a margin. It is in the box, so charge both.

We found no independent range test of this generation (the coverage section documents the search), so the bands above are planning envelopes from the published pack sizes, never measurements.

The 840 Wh main pack in the frame. The free second pack rides in a bag or on a rack until it is needed: 1,560 Wh total between them.

The motor, and what the gearing does with it

Eunorau's spec block lists a 48V 1000W Bafang M620 mid motor with 160 N.m torque, driven through a torque sensor. Bafang's own M620 page rates the motor at 1000 W with a maximum torque of 170 N·m and pitches it at eCargo and eFat duty: heavy bikes, heavy loads, which is precisely the job description here.

The mid-drive layout is why the payload figure is believable. A motor at the cranks pushes through the same 11–42T cassette the rider uses, so on a grade the effective torque multiplies with the gear. Three hundred pounds of rider and gear on a 15% two-track is where a mid-drive separates itself from a hub motor, and it is the use Eunorau names the bike for.

Our SPECTER-ST review walks the mechanism in more depth; the short version is that the motor gets a granny gear, and a hub motor never does.

The torque sensor decides how it feels. Assistance scales with pedal pressure instead of pedal motion, which on a quiet approach matters twice: power arrives smoothly, and the drivetrain stays quieter than a cadence-sensed system surging at every crank turn. Eunorau's spec lists a thumb throttle beside the five assist levels, which carries a legal meaning covered below.

The SRAM NX 11-speed cluster the motor drives through. The free single-speed kit exists for the rider who would rather have nothing here to bend.

Fit: strong numbers, missing chart

Eunorau publishes three fit numbers for this machine, and they are the three a buyer needs first: riders 5'3" to 6'4", a 300 lb total payload, and a Selle Royal saddle sitting 35.0" to 42.5" from the ground. Two frame sizes exist, 17" and 19", in three colorways.

What no one gets is a geometry chart. The page text carries no standover, reach or top-tube figure for either frame size; none of the 78 images it links holds a chart, and its size-guide button is hidden with nothing behind it. The step-through sibling publishes a full 12-row geometry chart — the finding is walked in our ST review; this page publishes none. Across the five fields we tally — payload, rider heights, top speed, controller, geometry — the S publishes four and the ST publishes one. Neither sibling manages all five, and a buyer wanting the whole picture currently needs both pages.

Two practical consequences. First, nothing published says how the 17" and 19" frames differ, so a rider between sizes has no numbers to decide with. Ask us and we will get the frame-by-frame figures from Eunorau before you commit.

Second, check the saddle floor: 35.0" to the ground at its lowest is a tall perch for the 5'3" rider the range admits, and which frame size that figure describes is not stated. Measure your inseam before you order — and if the smaller frame suits you, Army Green is orderable in the 17" as well as the 19" today.

The Mercer fit test

The Mercers are our editorial cast: a fixed group of American riders of different ages, heights and lives that every machine on this site is measured against. Every verdict reads a published number; we have not ridden this bike, so none of them is a ride impression.

The numbers each verdict reads, all Eunorau's own: 5'3"–6'4" rider range, the 35.0"–42.5" saddle height, 300 lb payload, 88.2 lb weight, the published 28 mph, and the class question.

Read Jack's row against Frank's. Both clear every published fit number, and the same chart produces a yes for one and a redirect for the other; the difference is the mission, never the frame. The machine has one natural buyer in this family, and it is the one Eunorau named it after.

The "Class 3" label against the statute

Eunorau's stat strip prints "CLASS Class 3", and unlike its sibling this page also publishes the number a class implies — the spec block's "Maximum Speed 28MPH / 45KMH", the two units agreeing with each other (28 mph is 45.06 km/h). Twenty-eight is the class 3 assistance ceiling. So far, consistent.

The wattage is where the label fails. California's definition, quoted and pinpointed in our SPECTER-ST review and read again for this page from the same archived text of Cal. Veh. Code § 312.5, draws the line at the definition's front door: an electric bicycle is "a bicycle equipped with fully operable pedals and an electric motor that does not exceed 750 watts of power" (§ 312.5(a)).

This motor is published at 1000 watts. The class subdivisions, (a)(1) through (a)(3), only sort machines that got through that door; 250 watts of this one didn't.

The thumb throttle adds the second question. Section 312.5(a)(3) defines class 3 around a motor "not capable of exclusively propelling the bicycle", with § 312.5(a)(4) permitting motor-alone movement for start assistance or a walk mode capped at 3.7 mph. A published thumb throttle on a machine labeled class 3 puts label and definition in visible tension; the wattage alone already settles the question, so nothing turns on it.

The thumb lever below the grip is the throttle in question: pushed, it moves the bike on motor power alone.

The federal definitions draw the same line, phrased "less than 750 watts", at 15 U.S.C. § 2085(b) and 16 C.F.R. § 1512.2(a)(2).

None of this bears on owning the machine or riding it where motorized use is welcome. Private land, and trails managed for motorized traffic, are this bike's home ground, and the label question does not follow it there. Where it matters is the bike lane, the multi-use path, and the state that routes access through a class definition — each state's statute is in our guide. California's text is the one read for this page; other states word their own versions differently, and our state-by-state guide carries each statute. Hunting-land rules are their own layer, set unit by unit by the land manager — tell us your state and your unit and we will read both sets of rules with you before you order.

Is the battery UL certified?

The stat strip says "UL CERTIFIED Yes" and stops. Neither "UL 2849" nor "UL 2271" nor "EN 15194" appears anywhere on the page — we checked the stripped source on 29 August 2026.

The number matters because the two UL standards certify different things: UL 2849 covers the whole electrical system, UL 2271 the battery pack alone. A landlord, an insurer or a city ordinance asking for "UL certification" usually means one of them specifically, and an unnumbered "yes" answers neither.

It also leaves the free second battery's status unstated, since certificates attach to specific packs. If a standard number decides your purchase, ask us first — the certificate comes out of Eunorau before any money moves.

The Eunorau Specter S review a forum asked for

In January 2023, a member of the Electric Bike Review forums opened a thread titled "Eunorau Specter S. Why are there no recent reviews?" and wrote:

This bike has no recent reviews. No tests, user videos or anything recent.

Ten weeks later the same rider was still asking — and the closest thing the thread produced to a test was that rider's own ownership report, for what a forum post is worth: almost 1,000 off-road miles, "happy with the bike", and a four-month wait for delivery back in the port-congestion era. By June the rest of the answers were reseller videos and marketing pages.

The situation the thread describes still holds for the 3.0. The record as of 29 August 2026: an independent review of the 2021 predecessor by Electrified Reviews, reachable now only through the Internet Archive because the site itself fails to resolve, and listing the old bike's own figures (48V 14Ah, 35 mph) that do not carry over.

Beyond it: an affiliate hunting blog (published 2023, updated 2026) with no generation identified, and an aggregator page with no test behind it.

We found no dedicated, independent test of the SPECTER-S 3.0 / Hunter X9 across two differently-phrased searches on 29 August 2026. Every figure on this page therefore traces to a document instead of a ride.

Eunorau's own gallery runs to 78 frames of this machine. Photography is the one thing it has never lacked; independent testing is the other thing.

The forum's skepticism is worth keeping, too: one member's caution that video reviewers "are paid by the company" is the reason our ledger marks what we have not verified, names what Eunorau has not published, and says plainly that we sell this bike.

Warranty

Eunorau's cover runs 10 years on the frame and 24 months on the battery, motor and electrical components, against manufacturing defects, with wear items and labor excluded.

The clauses worth reading before the season starts: the warranty belongs to "the original purchaser" and "does not transfer to another owner", and Requirement 3 expects an "E-bike check-up by a Eunorau specialist or dealer after the first year of use."

Requirement 6 halves "the standard Warranty period" for products "sold at wholesale or purchased by a business for commercial use (e.g., rental fleets, delivery services, sharing programs)" — the clause an outfitter buying for clients should read twice.

Buy it from us and the claim is our problem. Email us the fault; we run it with Eunorau, in writing, and you ride while the paperwork happens.

Ordering, shipping and support

Moon Black, one of the two colorways showing zero stock with us today. Army Green, in either frame size, is what is orderable.

The honest ledger

Green flags

• $1,097 of equipment free in the box: second battery, wheel set, single-speed kit, all three verified on Eunorau's listing and ours, 29 August 2026.
• The fit numbers a buyer actually asks for are published here: 28 mph, 300 lb payload, 5'3"–6'4" rider range, a 48V 30A controller.
• A torque-sensed Bafang M620 mid-drive, rated by the motor maker's own page at 1000 W and pitched at heavy-load duty.
• 1,560 Wh delivered: 840 Wh on the frame plus the free 720 Wh second pack.
• SRAM NX 1×11 with an 11–42T cassette, and a factory path to single-speed simplicity when the terrain argues for it.
• Suspension at both ends with honest labeling: the DNM shock's size and travel published as separate numbers — its sibling's sheet lists only "165mm" with no travel figure at all.
• A published payload-to-weight ratio of 3.4: on paper, the bike carries 3.4 times its own 88.2 lb.
• A decade of frame cover, 24 months on the electrics, and the claim handled by us.

Red flags

• No geometry chart, for either frame size: two sizes on sale and no published way to choose between them.
• The 35.0" minimum saddle height sits high against the published 5'3" rider floor, and which frame size it describes is unstated.
• "Class 3" against § 312.5: a 1000-watt motor against a 750-watt definition, with a thumb throttle raising the pedal-assist question beside it.
• "UL CERTIFIED: Yes" names no standard, and says nothing about the second battery's certificate.
• The 80-mile figure needs both packs on the ride: the main pack alone runs the claim's own arithmetic to about 43.
• 88.2 lb, before the rack, the gear and the second battery go on.
• No independent test of this generation turned up in our searches: every figure on this page is a document, never a ride.
• The recall check could not be completed, three days running.

Who should buy it

Buy the SPECTER-S 3.0 if your riding is loads, hills and ground that punishes a rigid frame — hunting country, or anything that looks like it — and you want the published payload, the published speed, and $1,097 of equipment in the same box.

Buy the SPECTER-ST 2.0 instead if getting on and off matters more than the last word in payload: same motor, same price, a 19.3" standover, and the fit chart this page is missing.

Buy the URUS 2.0 if the class question decides it: a published 20 mph keeps the paths and lanes in play, at $3,999. Buy the Defender if the budget stops at $1,599.

Do not buy it if you are under the 5'3" floor, your inseam argues with a 35" saddle, or your riding needs a machine the class definitions recognize.

Before you buy: the checklist

• ☐ Measure your inseam against the 35.0" saddle floor: the published rider range starts at 5'3", and the saddle number is the harder test.
• ☐ Confirm what is in the box the day you order: three gifts were verified 29 August 2026, and promotions end.
• ☐ Settle the class question for where you ride: your state's statute, and your hunting unit's motor-vehicle rules on top of it.
• ☐ Get the UL standard number in writing if a building, insurer or ordinance needs one — for both packs.
• ☐ Ask for the 17"-vs-19" frame figures before choosing a size; nothing published distinguishes them.
• ☐ Plan range on the main pack's 34-to-47-mile band, and carry the second battery on the long days.
• ☐ Confirm the assembly state in writing, because a built bike closes the return window.
• ☐ Photograph the crate before opening it; transit damage has a 48-hour window.
• ☐ Plan the storage: 88.2 lb lives on the ground floor.

Limitations of this review

1. We have not ridden it. No handling, comfort, noise or climbing verdict of ours appears anywhere above.
2. The range bands are planning envelopes computed from published pack sizes — no measured range of this machine exists, from us or anyone.
3. The gift bundle is a promotion verified on 29 August 2026 on both Eunorau's listing and ours; either party can end it, and the page's arithmetic dates from that day.
4. The class analysis reads California's statute only. Other states word their definitions differently; none is asserted here.
5. The coverage claim is bounded by its method: two differently-phrased single-model searches on one day, plus the deposits named in the register. A test we did not find is not proven absent.
6. The UL question is open. We report the claim and the missing standard number and assert nothing either way, for either battery.
7. The recall check could not be completed on 27, 28 or 29 August 2026; the service returned errors on every route, including a success code wrapping an error record. No recall position appears on this page.
8. The forum material is quoted as what it is — public posts by pseudonymous riders, used for the coverage record and never for a specification.
9. The five-field documentation tally is our own instrument, defined in the methodology and computed from the two live deposits; it counts publication, not accuracy.
10. No search-volume figures appear here. We do not publish numbers we cannot source.
11. Stock figures are one day's reading of our own store record, dated in the sentence.
12. Expiry: re-verify if Eunorau ends or changes the gift program, publishes a geometry chart or a UL certificate, restates the class, or if the price moves at either store.

The source register

Frequently asked questions

Is the Eunorau Specter S 3.0 a good electric hunting bike?

On the published numbers, it is built for the job: a torque-sensed 1000 W mid-drive, a 300 lb payload, 26×4.0" tires, suspension at both ends, and 1,560 Wh of battery in the box. What our searches could not find is an independent test of this generation — this page runs on Eunorau's documents, and says so wherever a figure would need a ride to verify.

What is the difference between the Specter S 3.0 and the Specter ST 2.0?

Same $2,999, same Bafang M620. The S is the full-frame Hunter X9 on 26×4.0" fat tires with the published payload, speed and rider-height numbers; the ST is the step-through on 27.5×3" wheels with a 19.3" standover and a full geometry chart. Each publishes the fit data the other omits.

What is the real range of the Specter S 3.0 with the dual battery?

Eunorau's 80-mile figure is the two-pack number, and both packs ship with the bike. At the consumption that claim implies, the 840 Wh main pack alone gives about 43 miles; plan on 34 to 47 from the main pack in real riding, and 62 to 87 for the pair on mixed-to-hilly ground. No independent measurement of this generation has surfaced in our searches.

Is it possible to add a second battery to the Eunorau Specter S?

Yes — and right now you do not have to buy it. The 48V 15Ah second pack ($499 on Eunorau's accessories list) ships free with the bike on both Eunorau's listing and ours, verified 29 August 2026, taking the delivered total to 1,560 Wh.

What are the color and frame options?

Eunorau lists Army Green, Safari and Moon Black, each in 17" and 19" frames. What is orderable with us on 29 August 2026 is Army Green, in either frame; no chart distinguishes the two sizes, so ask us for the figures before choosing between them.

What is the top speed of the Eunorau Specter S 3.0?

A published 28 MPH / 45 KMH, and the mph and km/h figures match. The number sits right at the class 3 assistance ceiling; whether the machine is a class 3 e-bike where you live turns on the 1000-watt motor against your state's definition rather than on the speed.

How much does the Eunorau Specter S 3.0 weigh?

A published 88.2 lbs before accessories. The payload rating is 300 lbs total, so the bike carries 3.4 times its own weight on paper — and lifting it onto a rack is a two-person job.

Is a 1000W e-bike street legal?

Not as an "electric bicycle" under the definition California wrote and the federal texts echo: California's line is "does not exceed 750 watts", the federal texts read "less than 750 watts", and this motor is published at 1000 — past both. That decides labels and path access, not ownership — private land and motorized trails are unaffected.

Your state's statute is the place to check; the AI-search panel we ran for this review sourced every one of its answers to brand marketing pages.

What kind of suspension does the Specter S have?

An EUNORAU inverted fork with 140mm of travel up front, and a DNM rear shock published at 190mm with 50mm of travel — size and travel stated separately, a distinction even its own sibling's sheet does not manage.

Does the Specter S have a display showing battery level?

Yes — a DP C010.CB unit on the CAN protocol, per the spec block, and Eunorau's own product photo shows a color display with a battery-percentage readout, in mph units.

Why are there no reviews of the Eunorau Specter S?

Riders have asked the same thing — an Electric Bike Review forum thread with that exact title ran through 2023. As of 29 August 2026 the independent record is a 2021-predecessor review reachable only through the Internet Archive, one affiliate blog, an aggregator page, and reseller video — no dedicated independent test of the 3.0 that we could find. This page documents the manufacturer's record instead, and labels everything a ride would be needed to verify.

Is the Eunorau Specter S worth $2,999?

For the riding it is built for, yes — and the field says so in numbers. The demand behind this page names two competitors above all others, and their own stores price them at $3,499 (QuietKat Apex Pro, listed in transit) and $5,799 (Bakcou Mule SD), both fetched 29 August 2026. This machine is $2,999 at Eunorau's own store and ours, with $1,097 of equipment in the box.

What no price can buy yet is an independent test — the ledger above shows both columns, and the buy-if conditions in the verdict are the honest terms of the yes.

What motor does the Specter S 3.0 use?

Eunorau's 48V 1000W Bafang M620 with "160 N.m torque", driven through a torque sensor. Bafang's own page rates the M620 at 1000 W with a 170 N·m maximum and aims it at eFat and eCargo duty.

Is the Specter S 3.0 designed for off-road use?

That is its stated purpose — Eunorau names it the Hunter X9 and builds it on fat rubber, full suspension and a mid-drive. Off-road is also where the class question quiets down: motorized-use trails and private ground do not care about the 750-watt line.

The bottom line

The SPECTER-S 3.0 is the best-documented bike in Eunorau's Specter line (28 mph, 300 lb, 5'3"–6'4", all published) wearing the industry's least-documented label, on a page missing its geometry chart. Right now its box also carries more free equipment than any listing we have reviewed: 1,560 Wh of battery, a second wheel format, and a single-speed insurance policy — $1,097 of it free, verified on both listings.

Know two things before you pay. The "Class 3" badge does not clear the 750-watt definition it borrows its name from; ride it where motors are welcome and the question disappears. And no independent test of this generation has surfaced; this page is the manufacturer's record, checked, computed and labeled, not a ride report.

Plan on 34 to 47 miles from the main pack and 29 to 40 from the second, carry both, and measure your inseam against the 35-inch saddle floor before the crate ships.

Buy it if the load is real, the ground is rough, and the truck is far away.

Primary sources

1. Eunorau. SPECTER-S 3.0 / HUNTER X9 — product page: stat strip, SPECIFICATION and Components blocks, accessories. eunorau-ebike.com/products/specter-s-hunter. Retrieved 29 August 2026; deposit copy and all 78 linked images archived.
2. Eunorau. 24-Month+ Limited Warranty. eunorau-ebike.com/pages/warranty. Deposit copy 28 August 2026.
3. Bafang. BAFANG Motors M-Series — M620. bafang-e.com. Undated; retrieved 29 August 2026, deposit copy archived.
4. California. Vehicle Code § 312.5 — Electric bicycle. Pinpoints § 312.5(a), (a)(3), (a)(4). Internet Archive capture of 24 August 2026, web.archive.org; the state server refused our connection on 29 August 2026.
5. United States. 15 U.S.C. § 2085 — Low-speed electric bicycles. Pinpoint § 2085(b). U.S. Government Publishing Office, govinfo.gov. Retrieved 29 August 2026; snapshot of 24 August 2026.
6. United States. 16 C.F.R. § 1512.2 — Definitions. Pinpoint § 1512.2(a)(2). eCFR, current as of 29 August 2026, deposit copy archived; snapshot of 25 August 2026.
7. UL Standards & Engagement (standards body; context only). UL 2849 and UL 2271. Retrieved 29 August 2026, deposit copies archived.
8. Electrified Reviews (review publication; predecessor coverage only). 2021 EUNORAU Spectre S Review. Wayback capture of 15 August 2025; electrifiedreviews.com did not resolve on 29 August 2026. Deposit copy archived.
9. Electric Bike Review forums (community forum; coverage record and quoted posts only). "Eunorau Specter S. Why are there no recent reviews?", thread 51691, January–June 2023. forums.electricbikereview.com. Retrieved 29 August 2026, deposit copy archived.
10. U.S. Consumer Product Safety Commission. SaferProducts recall database. saferproducts.gov/PublicSearch. Unreachable 27–29 August 2026 — on the 29th its data service returned a success code wrapping an error record. No recall position is stated on this page.
11. Redtail eBikes. SPECTER-S 3.0 store record (redtailebikes.com/products/eunorau-specter-s), refund policy and shipping policy. Retrieved 29 August 2026. First party.
12. Eunorau. SPECTER-ST 2.0 — product page (the sibling's record, used for the documentation tally and the wheel-format claim). eunorau-ebike.com/products/specter-st-1. Deposit copy 29 August 2026; the full working is on our SPECTER-ST review and its ledger.
13. Redtail eBikes editorial desk. SPECTER-S battery, range, gift and documentation-tally computation. scripts/specter_s_math.py; dataset at research/eunorau-specter-s/datasets/battery-range-gifts_20260829.csv. Computed 29 August 2026. First-party dataset, method stated in the file header.
14. QuietKat, Inc. (competitor manufacturer; price reporting only). Apex Pro Electric Hunting Bike — product page. quietkat.com/products/apex-pro-electric-hunting-bike. Retrieved 29 August 2026, deposit copy archived; listed $3,499, in transit.
15. Bakcou LLC (competitor manufacturer; price reporting only). Mule SD — product page. bakcou.com/products/mule-sd-1. Retrieved 29 August 2026, deposit copy archived; listed $5,799.