The TST Defender 26″ Fat Tire Ebike is a high-torque, all-terrain fat-tire rig aimed at riders who want power, stability, and serious carrying capacity in one package. With a 1300W SUTTO (BAFANG sub-brand) rear hub motor, 48V 15Ah battery, 26″ x 4.0″ Chao Yang fat tires, and a spec’d up to 500 lb max load, it’s built for commuting, off-road exploring, and heavy cargo duty without feeling underbuilt.
TST positions the Defender as a go-anywhere, do-anything ebike: fast enough to cruise up to 28 mph, tough enough for mixed terrain, and capable enough to replace short car trips—especially for larger riders or anyone carrying gear.
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👉 Check current availability and full specs of the TST Defender 26″ Fat Tire Ebike here.
TL;DR – TST Defender 26″ at a Glance
| Category | Details |
|---|---|
| Bike Type | 26″ fat-tire all-terrain ebike for commuting, trails, and cargo |
| Motor | 1300W SUTTO (BAFANG sub-brand) rear hub motor, 85 Nm torque |
| Battery & Range | 48V 15Ah integrated battery, claimed up to 65 miles per charge |
| Realistic Range | Expect roughly 25–45 miles for most riders (terrain, weight, PAS level matter) |
| Top Speed | Up to 28 mph (throttle mode supported to 28 mph per TST copy) |
| Sensor Type | Speed sensor (cadence-based assist, not torque-sensor) |
| Brakes | 180 mm hydraulic disc brakes front and rear |
| Tires | 26″ x 4.0″ Chao Yang puncture-resistant fat tires (8 mm tread depth) |
| Drivetrain | Shimano 7-speed + half-twist throttle |
| Weight & Payload | Approx. 71.65 lb bike weight; brand lists 450–500 lb payload (see note below) |
| Rider Fit | Suggested rider height 5’3″–6’4″ |
| Best For | Heavier riders, utility use, and all-terrain riders who want power and stability |
👉 See the latest color options and bundle configurations for the Defender.
Key Specs: TST Defender 26″ Fat Tire Ebike
| Spec Category | Defender 26″ Details |
|---|---|
| Motor | 1300W brushless rear hub motor (SUTTO, a BAFANG sub-brand) |
| Torque | 85 Nm |
| Battery | 48V 15Ah detachable lithium-ion battery |
| Claimed Range | Up to 65 miles per charge |
| Top Speed | Up to 28 mph (supports 28 mph in throttle mode per motor description) |
| Charge Time | 4–5 hours |
| Charger | 54.6V / 3A |
| Assist Levels | 5 levels of pedal assist (PAS 1–5) |
| Sensor | Speed sensor (cadence-based) |
| Brakes | 180 mm hydraulic disc brakes |
| Tires | 26″ x 4.0″ fat tires, Chao Yang puncture-resistant, 8 mm tread depth |
| Drivetrain | Shimano 7-speed shifter and derailleur |
| Throttle | Half-twist throttle |
| Frame Material | 6061 aluminum alloy |
| Product Weight | 71.65 lb |
| Weight Capacity | Vehicle spec block: 500 lb max load; marketing sections also mention 450 lb payload |
| Rider Height Range | 5’3″–6’4″ suggested |
| Phone App | App support: YES |
| Warranty | 1-year warranty, 1–3 day delivery, local pickup option |
👉 Review the full TST Defender spec sheet on the official product page.
Design & Intent: Fat-Tire Utility Meets High Torque
The TST Defender is framed as a powerful, versatile fat-tire platform that works in the city and off-road:
- 26″ x 4.0″ Chao Yang fat tires for grip on sand, snow, gravel, and broken pavement
- A 6061 aluminum alloy frame designed to take city abuse and trail abuse in equal measure
- Puncture-resistant tires with 8 mm tread for debris-heavy routes
Payload is a key selling point:
- Marketing sections highlight a 450 lb total payload, including front and rear baskets
- The technical spec block lists 500 lb weight capacity / max load
If you’re a heavier rider or planning to use the bike with racks, baskets, and real cargo, it’s safest to treat 450 lb (rider + cargo) as the working number, with 500 lb as the theoretical ceiling. That still puts the Defender in rare territory for capacity.
👉 See how TST positions the Defender for heavy riders and cargo use.
Motor, Battery & Real-World Range
At the heart of the Defender is a 1300W SUTTO rear hub motor (a sub-brand of BAFANG) delivering 85 Nm of torque. TST calls out a 28 mph top speed and specifically notes that the motor supports up to 28 mph in throttle mode, not just pedal assist.
The 48V 15Ah (720 Wh) battery is rated for up to 65 miles per charge under ideal conditions. In everyday use, what you see depends heavily on rider weight, terrain, wind, and how often you use higher PAS levels or throttle.
A more realistic planning window for most riders:
- About 25–45 miles per charge in mixed use
- Example: a 230 lb rider using PAS 3 on rolling terrain, mixing in some throttle and carrying a small load, is likely to land somewhere around 30–40 miles per charge.
The included 54.6V / 3A charger can refill the battery in about 4–5 hours, which makes lunch-stop or workday top-ups straightforward if you have access to an outlet.
👉 Check the Defender’s motor and range details on the brand page before you decide.
Riding Modes, Assist & Controls
The Defender uses a speed sensor, not a torque sensor, which means assist is triggered by how fast the cranks are turning rather than how hard you’re pushing.
Key elements:
- 5 levels of pedal assist (PAS 1–5) to balance effort vs. speed
- A half-twist throttle so you can ride without pedaling when you like
- TST’s FAQ notes four working modes, including a Boost Mode for extra help on hills or in snow
In practice:
- Lower PAS levels give you a gentle push to keep speeds steady while protecting range
- Higher PAS levels and the throttle let the 1300W motor and 85 Nm torque really show, especially from a stop or up short, steep ramps
- As with most cadence-based systems, power delivery can feel more “binary” than a torque sensor, but TST tunes it for smoothness in day-to-day riding
Brakes, Handling & Safety
A powerful fat-tire bike needs serious brakes, and the Defender comes with:
- 180 mm hydraulic disc brakes, front and rear
Hydraulic brakes are a big plus here because they:
- Provide strong stopping power with less hand force
- Offer more predictable modulation in wet or dusty conditions
- Handle heat better on long descents than smaller or mechanical setups
Stability comes from:
- The 26″ x 4.0″ fat tires, which add grip and natural suspension
- A relatively long wheelbase (45.7″) and overall length (74.2″), which favor straight-line stability over ultra-nimble city-bike handling
On the ownership side, TST highlights a 1-year warranty, 1–3 business day delivery, options for local pickup in Ontario, CA, and shipping via major carriers like FedEx, UPS, and DHL.
Comfort, Fit & Geometry
TST suggests the Defender fits riders from 5’3″ to 6’4″.
From the geometry table:
- Total length: 74.2″
- Handlebar height: 45.3″
- Wheelbase: 45.7″
- Seat height range: 30″–39″
- Stand height: 30″
- Top tube length: 21.4″
- Handlebar length: 26.6″
Taken together, that describes a larger, stable platform with an upright position rather than a compact urban bike. Riders in the middle of the height range will typically find mounting and dismounting straightforward; if you’re at the shorter end with a shorter inseam, the 30″ stand height is worth noting.
Comfort touches include:
- Chao Yang fat tires to soak up chatter from rough pavement and gravel
- An 80 mm hydraulic front suspension fork to smooth potholes and washboard roads
- A padded saddle and upright cockpit aimed at relaxed, everyday riding rather than aggressive racing posture
Utility & Cargo: Baskets, Racks, and Real-World Use
The Defender is clearly built to do work, not just cruise bike paths.
Highlights:
- A rear rack and fender set are included as part of the current promotion
- An optional front basket is available, and TST markets the bike as having a 450 lb total payload including baskets and cargo
In real life, that makes sense for:
- Weekly grocery runs without taking the car
- Home Depot or hardware store trips with tools or materials strapped to the rack
- Hauling camping gear, fishing gear, or a full cooler out to a trailhead or lakeside
- Heavier riders who want a bike that still feels relaxed and controlled when loaded
The “What’s in the Box” list confirms you get:
- Bike, battery with keys, charger
- Rear rack, fender set, headlight
- Front wheel, seat, pedals
- Basic tools (wrenches and Allen keys) for final assembly
Most riders comfortable with simple assembly can finish setup in an evening; otherwise, a local shop can handle the last 10–15%.
👉 See the full list of what’s included with the Defender in the box.
Pros & Cons
Pros
- 1300W SUTTO (BAFANG) rear hub motor with 85 Nm torque for strong climbing and acceleration
- 48V 15Ah battery with a realistic 25–45 mile range for most riders, and a 65-mile claim under ideal conditions
- High published capacity, with 450 lb payload messaging and 500 lb max load in the spec block
- 26″ x 4.0″ puncture-resistant fat tires with 8 mm tread for grip and comfort on varied terrain
- 180 mm hydraulic disc brakes appropriate for a heavy, high-power fat-tire bike
- Shimano 7-speed drivetrain + half-twist throttle for flexible control
- Speed up to 28 mph, including throttle mode support up to 28 mph per motor description
- App support, 1-year warranty, and fast shipping (1–3 business days) with major carriers
Cons
- Speed sensor (not torque-sensor), so assist feel is less “natural” than on torque-sensor mid-drives
- Fat tires and a long wheelbase trade some nimbleness for stability, especially in tight urban riding
- The 450 lb vs 500 lb payload messaging is slightly inconsistent on the product page
- At around 71.65 lb, it’s still a lot of bike to carry up stairs or onto high wall racks
- Single frame size may not perfectly fit riders far outside the 5’3″–6’4″ range
Who the TST Defender 26″ Is Best For
The Defender is a strong match if:
- You’re a heavier rider or regularly carry cargo and want a bike that’s explicitly built with high payload in mind
- You ride mixed terrain—city streets, gravel, light trails, maybe snow or sand on occasion
- You want a high-torque, fast fat-tire ebike that can realistically replace many short car trips
- You value hydraulic brakes, fat tires, and a big rear hub motor more than shaving every pound of weight
- You’re in the 5’3″–6’4″ height range and prefer a stable, planted ride feel
Who Might Want to Skip It
You may want a different style of ebike if:
- You frequently carry your bike up flights of stairs or onto high racks and need something much lighter
- You ride exclusively on smooth city paths and prefer a nimble, narrow-tire commuter
- You’re below 5’3″ or above 6’4″ and highly sensitive to fit and standover height
- You specifically want a torque-sensor mid-drive for the most natural pedaling feel
In those cases, a lighter commuter or mid-drive city bike will likely feel better day to day.
Final Thoughts: Is the TST Defender 26″ Worth It?
If you’re looking for a powerful, high-capacity fat-tire ebike that can handle real-world loads, rougher terrain, and higher speeds, the TST Defender 26″ Fat Tire Ebike lines up well with that brief.
You’re getting:
- A 1300W SUTTO rear hub motor and 48V 15Ah battery
- Up to 65 miles claimed range, with realistic 25–45 miles for typical mixed-use riding
- Hydraulic disc brakes, 26″ x 4.0″ puncture-resistant fat tires, and one of the higher payload ratings in this category
- Utility-focused touches like a rear rack, fenders, optional front basket, and tools in the box
- Warranty, app support, and quick shipping from the brand
If you’re just hopping bike lanes with a laptop bag, this much bike might be overkill. But if you’re the person hauling coolers, tools, or a week’s worth of groceries, the Defender finally feels like an ebike built for the way you actually live.
👉 Learn more and check current availability of the TST Defender 26″ Fat Tire Ebike here.
