Eunorau FAT-HS Full-Suspension Mid-Drive Fat eBike (Hunter X8)
$3,249with code SAVE200
Apply code SAVE200✓ Code SAVE200 is on: $200 comes off in your cart.
Options over $2,000 are $200 off with code SAVE200, from $3,249.
Every Redtail e-bike includes a free 1-month warranty plus manufacturer coverage. Add the Redtail Care Package for dedicated support from our US-based team — remote diagnostics, manufacturer claim handling & return-shipping coordination — for up to 5 years.
Your selected plan is added automatically when you tap Add to Cart. No Care Package is added by default.
A support & service plan — it does not cover physical repairs or replacement parts. See full Care Package details →
Eunorau FAT-HS Full-Suspension Mid-Drive Fat eBike (Hunter X8)
Nine gears, a mid-drive at the cranks, and 26×4 rubber. Built to get well past where the road stops.
A Bafang mid-drive putting 160 newton-metres through nine gears, on 26×4 rubber with a shock at each end.
The FAT-HS is the back-country access pick in our Eunorau range at $3,449: a 1000W Bafang M615 mid-drive rated to 160 N·m, 720 watt-hours, 26×4 Kenda tires, hydraulic discs and 300 lb of payload. Built for loose, steep ground. Ships free, in two frame sizes.
Free shipping in the lower 48 · Shop Pay instalments at checkout
- 1000WBafang M615 mid-drive
- 160 N·mTorque, published
- 720 Wh48V × 15Ah
- 28 mphMaximum speed, published
- 300 lbTotal payload
Why this bike
A shock at both ends, on a fat frame
An RST Guide fork with 75 mm of travel up front and a KS-388RL coil shock at the back. Fat tires alone take the edge off a rutted trail; a rear shock keeps the back wheel on the ground when the trail stops being smooth altogether.
At 79.4 lb it is 8.8 lb lighter than the SPECTER-S 3.0, the other 26×4 full-suspension bike we carry, and it is the firmer of the two: 75 mm at the fork against the SPECTER-S's 140 mm. That is a chassis set up to stay composed under load on a fire road rather than to soak up a rock garden.
A mid-drive multiplies torque. A hub motor cannot
The Bafang M615 sits at the cranks, so its 160 N·m goes through the same nine gears your legs do. Drop into a low gear on a steep, loose climb and the motor gets the same mechanical advantage you get.
A hub motor delivers a fixed output at the wheel with no gearing behind it, which is why it bogs down exactly where a mid-drive digs in.
Shimano Altus, named part by part
An SL-M2010 shifter, an RD-M2000 rear derailleur and a CS-HG400-9 cassette running 11–34T, on a 42T forged alloy chainring with 170 mm cranks.
Every one of those is a catalogue Shimano part your local shop can order, which matters more on a bike you intend to ride a long way from a road than a fancier group would.
26×4 Kenda tires and hydraulic discs that cut the motor
Kenda Krusade Sport tires in 26×4.0 with K-Shield protection put a wide, low-pressure contact patch on sand, gravel, snow and wet root.
Eunorau's own 180 mm hydraulic discs stop it, and the levers carry motor cut-off switches — touch either brake and the assist drops out before the pads do the work.
Why buy the FAT-HS here
$3,449, shipped free anywhere in the lower 48. That is the price on this page and the price at checkout — no freight line, no assembly fee, no surcharge for the bigger frame.
Free US shipping
Every e-bike ships free within the contiguous United States, dispatched in 1–3 business days with tracking emailed the day it leaves. A bike this size usually travels by freight, and that is included.
Pay over time
Shop Pay instalments are available at the payment step, so the $3,449 can be spread rather than paid at once. You choose it at checkout — nothing to apply for here.
We file the warranty claim
Eunorau covers the frame for 10 years and the battery, motor and electrical components for 24 months. If you need any of it, you send it to us and we file and track the claim. You never deal with the factory.
A US company answers
Redtail is US-based, sells in USD and supports the bike here. Ask us about frame size or delivery access before you order and a person who has the spec sheet open will answer.
Free shipping in the lower 48 · Shop Pay instalments at checkout
Which frame, and is it your size?
Eunorau builds the FAT-HS in a 17" and a 19", and publishes a fit range of 5'3" to 6'4" across the two. The seatpost carries a Promax quick-release collar and a Selle Royal saddle that sets between 34" and 43.3" off the ground, so there is real adjustment inside each size.
| Dimension | 17" frame | 19" frame |
|---|---|---|
| Seat tube | 432 mm (17 in) | 483 mm (19 in) |
| Standover | 780 mm (30.7 in) | 800 mm (31.5 in) |
| Reach | 507 mm (18 in) | 512 mm (20.2 in) |
| Top tube | 582 mm (22.9 in) | 600 mm (23.6 in) |
| Stack | 425 mm (16.7 in) | 475 mm (18.7 in) |
| Wheelbase | 1,306 mm (51.4 in) | 1,311 mm (51.6 in) |
| Total length | 2,056 mm (80.9 in) | 2,061 mm (81.1 in) |
| Weight | 36 kg (79.4 lb) | 36 kg (79.4 lb) |
Eunorau's published geometry table, eunorau-ebike.com/products/fat-hs, read 1 September 2026.
The 19" is the one to buy if you ever want the second battery. Eunorau states that the optional second pack does not fit the 17" frame, and that on the 19" the rear shock must be locked out while it is installed. Both frames cost the same $3,449 here, so if the long-range option matters to you at all, take the 19" — it costs nothing extra to keep the door open.
Straight answers before you order
The 80-mile figure needs the second battery
Eunorau publishes “up to 80 miles” explicitly with dual batteries. On the 720 Wh the bike ships with, plan on the mid-thirties in the terrain this bike is bought for. If a single-charge number is what you are shopping on, the FAT-HD 1.0 Pro carries 1,200 Wh on one pack for $1,999.
It is a heavy bike
36 kg (79.4 lb) with the battery in. That weight is what the rear shock, the fat rims and the mid-drive cost, and on the trail it reads as planted rather than sluggish. Lifting it onto a car rack is a two-person job, and a hitch rack rated for e-bikes is the sane answer.
Cadence assist, not torque
The M615 reads pedal rotation rather than pedal force, so assist arrives at a set rate once you turn the cranks instead of tracking how hard you push. On loose climbs, where you want steady power rather than power that fades as your legs do, that is the behaviour you actually want. Riders who prefer a torque-sensing road feel are better served by the SPECTER-S 3.0.
Charging is an overnight job
The supplied charger is a 2.0 A unit. Against a 720 Wh pack that is a slow, cool charge rather than a fast one — put it on when you get home and it is ready in the morning. A second charger for the truck is the usual fix and we can quote you one.
Rack and fenders are extra
Eunorau lists both as optional on this frame, and sells a rack-and-fender set made for it. Say the word when you order and we will put the matching set in the same shipment so it arrives with the bike rather than a week later.
Two frame sizes, one decision
If you are between sizes, take the 19": same price, taller stack, and the only frame the second battery fits. Tell us your inseam before you order and we will check it against the standover for you.
What Eunorau says about UL
Eunorau marks this model “UL CERTIFIED: Yes” on its own product page, without naming which standard or publishing a certificate number. If your building, campus or insurer asks for a specific listing, say so when you order and we will request the certificate from Eunorau and put it in front of you before anything ships.
Shipping, warranty and returns
Getting it to you
Free freight in the lower 48, dispatched in 1–3 business days, typically delivered 5–10 business days after that. Freight deliveries are booked with you by appointment. Full terms on our shipping policy.
The first 48 hours
Look the shipment over on delivery and photograph anything that is not right within 48 hours. If it arrives dead, will not charge or throws a code, that is a warranty matter and we handle it from here.
Warranty, filed by us
10 years on the frame; 24 months on battery, motor and electrical components, against manufacturing defects. Register with Eunorau after purchase and keep your Redtail order confirmation. We file the claim.
Changed your mind
Unopened, factory-sealed returns are accepted on request within 72 hours of delivery. The conditions and charges are set out in full on our refund and return policy.
How the FAT-HS compares with the rest of our Eunorau range
Two of our Eunorau bikes are full-suspension on 26×4 tires, and they are set up for different jobs. The FAT-HS is the lighter and firmer of the pair; the SPECTER-S 3.0 has nearly twice the fork travel and costs less. Every figure below is Eunorau's own.
| FAT-HS | SPECTER-S 3.0 | FAT-HD 1.0 Pro | Defender | |
|---|---|---|---|---|
| Price | $3,449 | $2,999 | $1,999 | $1,599 |
| Suspension | Front and rear | Front and rear | Front | Front and rear |
| Fork travel | 75 mm | 140 mm | 100 mm | 100 mm |
| Motor | 1000W Bafang M615 | 1000W Bafang M620 | 1000W Bafang mid-drive | 1000W Bafang mid-drive |
| Assist sensing | Cadence | Torque | — | — |
| Battery | 48V 15Ah (720 Wh) | 48V 17.5Ah (840 Wh) | 48V 25Ah | 48V 15Ah |
| Drivetrain | Shimano Altus 9-speed, 11–34T | SRAM NX 1×11, 11–42T | Shimano 7-speed, 12–28T | Shimano 7-speed, 14–28T |
| Weight | 79.4 lb | 88.2 lb | 78.7 lb | 66 lb |
| Payload | 300 lb | 300 lb | 375 lb | 300 lb |
| Maximum speed | 28 mph | 28 mph | 20 mph | 20 mph |
| Tires | 26×4.0 | 26×4.0 | 26×4.0 | 27.5×3.0 |
| Buy it for | Fire roads, access routes, carrying gear | Longer travel and torque-sensed climbing | One-charge distance and load | The lowest way into a suspended fat bike |
Prices and availability read from our own storefront on 1 September 2026; specifications from each model's own page on eunorau-ebike.com the same day. A dash means Eunorau publishes no figure for that model, left blank rather than estimated.
Full specifications
| Specification | Published figure |
|---|---|
| Motor | 48V 1000W Bafang M615 mid-drive, 160 N·m |
| Pedal assist | Cadence sensing, 5 levels |
| Battery | 48V 15Ah (720 Wh) |
| Optional second battery | 17 Ah — 19" frame only |
| Range | Up to 80 miles, with the second battery fitted |
| Maximum speed | 28 mph |
| Charger | US-standard 2.0 A smart charger |
| Total payload capacity | 300 lb |
| Weight | 36 kg (79.4 lb) |
| Recommended rider height | 5'3" to 6'4" |
| Frame | 6061 aluminium alloy, full suspension, 17" and 19" |
| Fork | RST Guide, 75 mm travel |
| Rear shock | KS-388RL, 48 mm |
| Drivetrain | Shimano Altus 9-speed: SL-M2010 shifter, RD-M2000 derailleur, CS-HG400-9 11–34T |
| Chainring and cranks | 42T 7075 CNC chainring, 170 mm forged alloy cranks |
| Brakes | Eunorau-design 180 mm hydraulic discs, motor cut-off in the levers |
| Tires | Kenda Krusade Sport 26×4.0 with K-Shield |
| Rims | 26 in black alloy, stainless spokes |
| Display | DP C080.C colour LCD |
| Throttle | Thumb throttle |
| Saddle | Selle Royal, 34" to 43.3" off the ground |
| Lighting | 6–60V LED headlight, independently switched tail light |
| Rack and fenders | Optional, sold as a matched set |
| In the box | Manual and tool kit |
Every figure above is read from Eunorau's own product page at eunorau-ebike.com/products/fat-hs, verified 2026-09-01, and reproduced as Eunorau publishes it. Where Eunorau prints more than one value we give the one from its specification table and record the other here: the page also shows a CDC6 display, a KS-388L 190 mm rear shock, and a 77.1 lb weight against the 36 kg (79.4 lb) in its geometry table. We publish no figure Eunorau does not publish, and we hold no test of our own on this model.
Manuals and documentation
In the box
Eunorau lists a printed manual and a tool kit as included with the bike, so you are not assembling it off a phone screen.
Everything else
Eunorau publishes its display, controller, shock and accessory documents as separate files rather than one book per bike. Tell us which one you want when you order and we will send you our copy with the shipping confirmation, so you are not hunting through a supplier download hub for it.
Where this bike is ridden
The FAT-HS is built and sold for trail, fire road and back-country riding — loose ground, private land, and the kind of access route that gets you to a hunting stand before first light. That is what the tires, the gearing and the shock are for.
Eunorau publishes it at 1000 W and 28 mph. The federal definition of a low-speed electric bicycle in 15 U.S.C. § 2085(b) is drawn at motors of less than 750 W and a top motor-powered speed under 20 mph on level ground, and states set their own class rules on top of that. Read your own state before you plan to ride it on a public path: our state-by-state e-bike law guide sets out where each one draws the line.
Frequently asked questions
How much does the Eunorau FAT-HS weigh?
36 kg — 79.4 lb — in Eunorau's geometry table, the same for both frame sizes. Eunorau's specification block on the same page shows 77.1 lb; we publish the geometry figure because it is the one given per frame size.
How fast is the FAT-HS?
Eunorau publishes a maximum speed of 28 mph. Because that is above the 20 mph federal low-speed line and the motor is rated at 1000 W, check your own state's rules before riding it on a public path — our state law guide covers all fifty.
How far will it actually go on one charge?
Eunorau's “up to 80 miles” is published with the second battery fitted. On the 720 Wh pack the bike ships with, plan on roughly the mid-thirties in the mixed, loose terrain this bike is bought for, and less in cold weather or on heavy throttle use.
Does the second battery fit both frame sizes?
No. Eunorau states the second battery is not compatible with the 17" frame, and that on the 19" the rear shock has to be locked out while it is installed. Both frames are the same price here, so choose the 19" if long range matters to you.
Is it a 1000W motor or 1500W?
Eunorau's specification lists 1000 W nominal for the Bafang M615. Its marketing copy on the same page describes over 1500 W of peak power. Nominal and peak are different measurements: 1000 W is the continuous rating, and it is the number that matters for how your state classifies the bike.
What is the Hunter X8?
The same bike. Eunorau titles this model “FAT-HS / Hunter X8” — FAT-HS is the engineering name and Hunter X8 is the name used for the hunting market.
Does it come with a manual?
A printed manual and a tool kit are listed in the box. Eunorau also publishes separate display, controller and shock documents; tell us which one you need and we will send our copy.
What warranty comes with it?
10 years on the frame and 24 months on the battery, motor and electrical components, against manufacturing defects, for the original purchaser. Register with Eunorau after purchase and keep your Redtail order confirmation. If you ever need it, we file the claim for you.
Can I order one today?
Yes — both the 17" and the 19" are available to order at $3,449 with free shipping in the lower 48.
Ready to ride it?
The FAT-HS is the full-suspension pick in our Eunorau range: a mid-drive that climbs, a shock at each end, and 300 lb of payload for the gear you are taking in with you. Free shipping, instalments at checkout, and we handle any warranty claim.
Free shipping in the lower 48 · Shop Pay instalments at checkout · we file any warranty claim for you
More from Redtail
Specifications on this page were read from Eunorau's own product page at eunorau-ebike.com/products/fat-hs on 1 September 2026 and are reproduced as Eunorau publishes them. Prices are USD and current at that date. Warranty terms are Eunorau's; shipping and return terms are Redtail's own and are linked above in full. Redtail publishes no test, rating or review score for this model. Corrections: support@redtailebikes.com.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
Fast U.S. Shipping
Exceptional Service
At Redtail eBikes, we go beyond just selling ebikes. We're dedicated to offering the best customer service and support to ensure you're fully satisfied. Your happiness is our priority, and we're here to make your experience as smooth as your ride.
Blog posts
