GREATWORK R8 Fat Tire Electric Dirt Bike 2500W
- Maximum Weight Recommendation: 330 pounds
- Wheel Size: 20 inches
- Size: Large
- Lithium Battery Energy Content: 1200 Wh
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Expect real range and hill-climbing torque here, best approached as a throttle-first ride rather than a bike meant for serious pedaling.
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ASIN: B0FHQDTVK9Model: R8Category: Electric Bicycles
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Overview
GREATWORK's R8 pairs a 2000W continuous (2500W peak) motor with full suspension and 20 by 4 inch fat tires, styled closer to a motorcycle than a traditional commuter bike.
This bike leans harder into moped-style ergonomics than most fat-tire ebikes, a seating position and geometry that at least one owner felt fought against actual pedaling rather than complementing it.
- 2000W continuous / 2500W peak motor, 125N.m torque
- 1200Wh removable battery (48V 25Ah), up to 100 miles PAS range
- Full suspension with 20 x 4 inch fat tires
- 7-speed gearing, 5 riding modes, IP54 waterproof battery
Who it's for
Riders who want a powerful, motorcycle-styled commuter or off-road ebike and plan to lean on throttle and pedal assist rather than manual pedaling are the intended audience. Anyone wanting a bike that also works as a real pedal-powered bicycle, or planning jumps, should look elsewhere, since the rear suspension is not built for that.
Pros and cons
- Strong torque handles hills and heavier riders with ease
- Long real-world range reported over hundreds of miles of use
- Multiple buyers found assembly manageable within about an hour
- Rear suspension bottoms out on jumps or rough drops
- Riding position and high pedal-assist speeds make actual pedaling impractical
- Cruise control is fiddly and disengages easily with any input
Performance notes
Torque does the heavy lifting here: 125N.m from the 2000W motor handles inclines up to 35 degrees and reaches a claimed 37mph top speed, with riders reporting real-world speeds in the low to high 30s. Range depends heavily on riding style, one owner got about 50 miles of mixed use, while another notes hitting the advertised 100 mile figure requires averaging around 15mph in pedal assist mode.
Where it stands among electric bicycles
- 1200 Wh lithium battery energy content: longer than 80% of the electric bicycles we list.
From the specs of the 502 electric bicycles we list; not a test result.
Specifications
| Brand | Greatwork |
|---|---|
| Model | R8 |
| Dimensions & fit | |
| Maximum Weight Recommendation | 330 pounds |
| Wheel Size | 20 inches |
| Size | Large |
| Wheel Width | 4 inches |
| Capacity & performance | |
| Number Of Speeds | 7 |
| Bicycle Drivetrain Type | Chain Drive |
| Bicycle Gear Shifter Type | Thumb |
| Age Range Description | Adult |
| Power & efficiency | |
| Lithium Battery Energy Content | 1200 Whhigher than 80% of 221 electric bicycles |
| Wattage | 2000 wattshigher than 86% of 197 electric bicycles |
| Power Source | Electric Motor |
| Construction & materials | |
| Frame Material Type | Carbon Steel |
| Wheel Material | Aluminum |
| Color | Classic Black |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | 1 year |
| Warranty Type | Limited |
| Other details | |
| Electric Assist Type | pedal assist |
| Brake Style | Disc |
| Suspension Type | Dual |
| Bike Type | Commuting Bike |
| Derailleur Configuration | Rear |
| Is Assembly Required | Yes |
| Model Year | 2025 |
| Theme | Sport |
| Intended Riding Terrain | Mountain Terrain, Unpaved Trails |
Closest rivals on specs
Frequently asked questions
Can this bike handle jumps or aggressive off-road riding?
One reviewer specifically warns against jumps, noting the rear suspension bottoms out under that kind of impact.
How much assembly is needed out of the box?
It arrives 90 percent pre-assembled, and multiple buyers finished setup in about an hour using the manufacturer's video guide.