TST R004 Full Suspension Fat Tire Electric Bike
- Maximum Weight Recommendation: 450 pounds
- Wheel Size: 20 inches
- Lithium Battery Energy Content: 1200 Wh
- Electric Assist Type: pedal assist, throttle assist
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A solid, comfortable fat tire ebike for most riders, but check the ebike class sticker against your state's rules before you buy if that matters to you.
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ASIN: B0GCZRVH4VModel: R004Category: Electric Bicycles
More from this brandAll TS TST GRP LLC electric bicyclesColors Available
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Overview
This TST R004 is a 20 inch fat tire electric bike with a 750W motor (1500W peak), a 48V 15Ah removable battery, and front and rear suspension, positioned by TST as a commuter that can also handle off-road trails.
It ships about 90 percent assembled with an included tool kit and video, and TST backs it with a 180-day warranty. A reviewer in California found a factory sticker limiting it to 20 mph out of the box, worth checking against local ebike rules before buying.
- 750W motor, 1500W peak, 7-speed drivetrain
- 48V 15Ah removable battery, up to 60 miles PAS
- 20 by 4 inch tires with front and rear suspension
- 450 lb max load, 180-day warranty
Who it's for
It suits a buyer who wants a fat tire ebike for both daily riding and occasional trail use, and who is comfortable with basic self-assembly. It is a weaker fit for anyone in a state with strict ebike class rules who needs to confirm speed class before purchase, since the bike's factory speed limiter may not match every state's expectations.
Pros and cons
- Front and rear suspension smooths rough surfaces
- Strong customer support reported for parts and repairs
- Handles hill climbs well according to multiple riders
- Factory speed sticker may limit it below advertised class
- A frayed wire stopped one bike from powering on
- Handlebar stem loosened for one rider despite proper tightening
Performance notes
The 750W motor (1500W peak) and 48V 15Ah battery are rated for up to 60 miles in pedal assist and 40 miles on throttle alone, with a 6 to 7 hour recharge. Front and rear suspension and 20 by 4 inch tires are aimed at smoothing out bumps rather than pure speed, and mechanical disc brakes with a 7-speed drivetrain and 3 working modes let a rider match the bike to city streets, mountain paths, or beach sand. An LCD display tracks speed, distance, and battery level.
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 | TS TST GRP LLC |
|---|---|
| Model | R004 |
| Dimensions & fit | |
| Maximum Weight Recommendation | 450 poundshigher than 94% of 266 electric bicycles |
| Wheel Size | 20 inches |
| Size | 20*4.0 |
| Capacity & performance | |
| Number Of Speeds | 7 |
| Bicycle Drivetrain Type | Hub Drive |
| Bicycle Gear Shifter Type | Twist Grip |
| Age Range Description | Adult |
| Power & efficiency | |
| Lithium Battery Energy Content | 1200 Whhigher than 80% of 221 electric bicycles |
| Power Source | Rechargeable Battery |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Color | Black |
| Included components | |
| Unit Count | 1 |
| Included Components | Tool Kit |
| Warranty & support | |
| Warranty Description | 6 months |
| Warranty Type | Limited |
| Other details | |
| Electric Assist Type | pedal assist, throttle assist |
| Brake Style | Disc |
| Suspension Type | Dual |
| Bike Type | Electric Bike |
| Derailleur Configuration | Rear |
| Is Assembly Required | Yes |
| Specific Uses For Product | Road, Trail |
| Theme | Motorcycle |
| Additional Features | LCD-Display |
| Intended Riding Terrain | Mountain Terrain, Unpaved Trails, Urban Terrain |
Closest rivals on specs
Frequently asked questions
How far can the TST R004 ride on a charge?
TST rates it up to 60 miles in pedal assist mode and 40 miles on throttle alone, depending on rider weight.
What is the TST R004's weight capacity?
The bike itself weighs about 66 lbs and carries a maximum load of 450 lbs.
Is the TST R004 street legal at full speed?
One reviewer in California found a factory sticker limiting it to a Class 2, 20 mph rating, so check your state's ebike class rules before assuming full advertised speed applies.