TST R9 Fat Tire Electric Dirt Bike 48V 30Ah
- Maximum Weight Recommendation: 450 pounds
- Size: 20 Inches
- Electric Assist Type: pedal assist, throttle assist
- Brake Style: Disc
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
The power and range specs are strong on paper, but reported build defects on more than one unit mean a careful post-assembly inspection is worth doing before the first ride.
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ASIN: B0G92M68KPModel: R9Category: Electric Bicycles
More from this brandAll TS TST GRP LLC electric bicyclesOverview
TS TST GRP LLC's R9 model packs a 1500W peak motor into a fat tire frame, running on a 48V battery available in 15Ah or 30Ah, with a claimed range up to 60 miles electric-only and 130 miles with pedal assist.
- 1500W peak motor with 90 N.m torque, rated Class 2 to Class 3
- 48V battery in 15Ah or 30Ah, UL 2849 tested
- 20x4 inch puncture-resistant tires with dual mechanical disc brakes
- 360-degree LED lighting across headlight, brake light and turn signals
Who it's for
Riders after serious off-road power and range, and willing to inspect a new bike closely before the first ride, are who this fits. Shorter riders, under about 5 foot 6, may find the stock seat position awkward based on reviewer feedback.
Pros and cons
- Strong power delivery on hills and off-road terrain, per reviewer feedback
- 360-degree LED lighting for night visibility
- One buyer found a bent front brake rotor causing rubbing on the pad
- Another unit's front fork wouldn't swivel due to a factory assembly defect
- Seat height runs tall, not recommended for riders under 5 foot 6
- Fender mounting screw was thread-locked tight at the factory
Performance notes
The 1500W peak motor and 90 N.m torque are built to handle up to a 35 degree slope, with the waterproof 48V 15Ah battery charging fully in about 5 hours. Range claims run over 60 miles per charge, though as with most e-bikes that figure depends on terrain, rider weight and how much throttle is used versus pedal assist.
Specifications
| Brand | TS TST GRP LLC |
|---|---|
| Model | R9 |
| Dimensions & fit | |
| Maximum Weight Recommendation | 450 poundshigher than 94% of 266 electric bicycles |
| Size | 20 Incheslower than 55% of 98 electric bicycles |
| Capacity & performance | |
| Bicycle Drivetrain Type | Hub Drive |
| Bicycle Gear Shifter Type | Trigger |
| Power & efficiency | |
| Power Source | Electric Motor |
| Construction & materials | |
| Wheel Material | Rubber |
| Color | Yellow |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Electric Assist Type | pedal assist, throttle assist |
| Brake Style | Disc |
| Derailleur Configuration | Rear |
| Is Assembly Required | Yes |
| Specific Uses For Product | Trail |
Closest rivals on specs
Lpqviatas Dual Motor Fat Tire Electric Bike 8000W- Size 20 vs 24 inches (-17%)
MOONCOOL ZT-E20 Folding Fat Tire Electric Trike- Maximum Weight Recommendation 450 vs 400 pounds (+13%)
PUCKIPUPPY Boxer Full Suspension Fat Tire Electric Bike- Maximum Weight Recommendation 450 vs 400 pounds (+13%)
- Size 20 vs 26 inches (-23%)
Frequently asked questions
What's the range of the TST R9?
TST lists up to 60 miles in pure electric mode and up to 130 miles using pedal assist, depending on the 15Ah or 30Ah battery configuration and riding conditions.
What size rider does it fit?
One reviewer noted the seat sits high and doesn't suit riders under about 5 foot 6, since their feet couldn't reach the ground.