TST Electric Bike for Adults 1500W Peak 20" Fat Tire All-Terrain E-Bike 60/130 Miles…
- Electric Bicycle
- 450 pounds
- Electric motor
- Trigger
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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How it ranks among the 478 electric bicycles we track
3.4★ across 4 Amazon ratings, Bayesian-smoothed toward the category average.
4 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 478 electric bicycles we track - how the scorecard works · full electric bicycles data report. Confidence: limited - limited rating history.Last refreshed Jun 21, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
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.
What buyers say
From Amazon customer reviews.
One buyer called it an excellent, well-shipped bike, but two others ran into assembly problems, a bent front rotor rubbing against the brake pad on one unit and a front fork that wouldn't swivel on another, along with a seat height that a shorter rider found unworkable.
Strengths and trade-offs
Drawn from this product's published specifications.
- 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 pounds |
| Size | 20 inches |
| Capacity & performance | |
| Bicycle Gear Shifter Type | Trigger |
| Bicycle Drivetrain Type | hub drive |
| Power & efficiency | |
| Power Source | Electric motor |
| Construction & materials | |
| Wheel Material | Rubber |
| Color | yellow |
| Included components | |
| Included Components | Front and Rear Suspension System, 20"x 4" Puncture-Proof Snow Tires |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Electric Assist Type | pedal assist, throttle assist |
| Is Assembly Required | Yes |
| Brake Style | Disc |
| Specific Uses For Product | Trail |
| Derailleur Configuration | Rear |
Other TS TST GRP LLC electric bicycles
How it compares
This product against the closest alternatives we track in electric bicycles.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| TST Electric Bike for Adults 1500W Peak 20" Fat Tire All-Terrain E-Bike 60/130 Miles…This product | 3.4 / 5 | 4 | 2.7 / 5 |
| Wooken Electric Bike for Adults with 500W MotorWooken | 4.4 / 5 | 312 | 4.1 / 5 |
| TotGuard Electric BikeTotGuard | 4.4 / 5 | 286 | 4.1 / 5 |
| ANCHEER 14" Folding Electric Bike for TeensAncheer | 4.2 / 5 | 329 | 4.0 / 5 |
| Gotrax 16" Folding Electric BikeBrand | 4.4 / 5 | 555 | 4.0 / 5 |
Similar electric bicycles from other brands
Questions about the TS TST GRP LLC R9
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
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.
Is the TST R9 reliable out of the box?
Reviews are mixed on assembly quality, one buyer found a bent brake rotor and another a front fork that wouldn't swivel due to a factory defect, so checking the bike closely after assembly is worthwhile.
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.