Responsive Power for Every Trail
Build
The torque sensor responds naturally to every pedal stroke, delivering smooth assistance, confident control, and effortless performance across climbs, trails, and daily rides.
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- Motor
- 48V 500W
- Battery
- 48V 13Ah
- Top speed
- 28 mph
- Max Range
- 80 Miles
- Sensor
- Torque Sensor
- Max Load
- 330 Lbs
E-Bike · Hybrid
In stock
SU42-PRO Hybrid E-Bike
$1,150
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SU42-PRO
MTB Torque Sensor E-Bike Hill way
Components up close
Torque you can feel
Power
Tuned for stop-and-go traffic and steep grades alike.
Range that outlasts your ride
Range
Lightweight aluminum MTB frame with integrated battery design. Low standover geometry allows easy on-and-off, combining everyday practicality with reliable riding performance.
Stops reliably when you need it
Braking
Confident stopping power in traffic, rain, or loaded with cargo.
Aluminum Strength, Ergonomic Comfort
Build
Lightweight aluminum construction pairs ergonomic comfort with modern styling, while a 330-pound payload capacity delivers dependable strength for commuting, recreation, and everyday riding with confidence.
Torque Sensor
Sensor
Advanced torque sensor delivers smooth, natural power assistance by detecting pedal force instantly, improving efficiency, control, comfort, and overall riding experience.
Confidence for every ride
- 6061 AluminumFrame
- 27.5 inchWheel Size
- 48V 500WMotor
- 28 mphTop Speed
Specs & details
Every number that matters, grouped so you can scan it fast.
Electrical System
Motor48V 500W (Peak 1200W）
Battery48V 13Ah
Top Speed28 mph (for regions where permitted)
Range80 Miles
Braking & Drive System
BrakeHydraulic Disc Brake
Pedal Assist1-5 Level Pedal Assist
ThrottleTwist Throttle
Shift LeverShimano 7 Speed
SensorTorque Sensor
Frame & Geometry
Frame Material6061 Aluminum Alloy
Weight68 Lbs
Max Load330 Lbs
Chassis & Suspension
Tire27.5" × 2.0"
SuspensionFull Suspension
Suspension Travel120mm
Quick Release LeverWheel Quick Release
Questions about specs? Ask us.
Delivery & setup
From order to first ride
Order today
Choose your options and check out.
We check and ship
Ships in 1–2 business days
Delivered to your door
Arrives in 5–10 business days · Free shipping over $100
Set up and ride
About 85% pre-assembled, 10–15 minutes to finish
Prefer to see it first?Reserve SU42-PRO for pickup or an inspection at our Monrovia shop.
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Good to know
Can’t find your answer? Talk to WholeBikes before you order.
The torque sensor on a mountain e-bike measures the force you apply to the pedals. When you start pedaling, it detects the amount of rotational force (torque) you're exerting. Based on this measurement, it sends a signal to the motor controller, which then adjusts the level of motor assistance accordingly. For example, if you pedal harder, the sensor detects the increased torque and the motor provides more power to help you tackle steep inclines or rough terrain more easily.
The torque sensor can actually help improve battery life. Because the motor assistance is precisely matched to your pedaling effort, it avoids wasting energy by providing excessive power when it's not needed. For example, when you're coasting or pedaling lightly on a flat section, the motor provides minimal assistance, conserving battery power. This efficient use of energy means you can ride for longer distances on a single charge compared to a system that doesn't adjust power as intelligently.
Regular maintenance of the torque sensor is relatively simple. Keep the area around the sensor clean and free of dirt, mud, and debris, as these can interfere with its operation. Also, check the sensor's connections periodically to ensure they are secure.
