SPECIFICATIONS

Torque Sensor EBike Conversion Kit TSDZ2B TSDZ8 TSDZ16 Mid Drive Motor Kit Tongsheng 48V 500W 750W 80N.m 140N.m 160N.m Powerful High Torque Electric Bicycle Motor Engine for Commuter City Bike Road Mountain City Bike 68-73mm

Certification: CE

Chain Wheel: 42T for 500W /44T for 750W / 46T for 1000W

Delivery Time: 2 - 7 Days Delivery

Design: Brushless

Max Torque: 80N.M for 500W,140N.m for 750W, 160N.m for 1000W

Motor: Side Hung Motor

The Motor Kits: Battery is not Included

Voltage: 48V

Wattage: > 400w

Varstrom & Tongsheng Torque-Sensing Mid Motor Kit

Upgrade your bicycle with genuine Varstrom torque-sensing power. The TSDZ2B 48V 500W, Z8 48V 750W, and TSDZ16 48V 1000W mid-drive kits transform standard mountain bikes, city bikes, and folding bikes into smooth, high-torque electric machines.

Power flows through your existing drivetrain, so you keep the natural riding feel while gaining enough torque to climb steep grades without breaking a sweat. A new bidirectional free-wheeling clutch lets you pedal naturally with zero drag when the motor is off—unlike traditional one-way clutches. The latest reinforced 1T4 main wiring harness uses the Tongsheng communication protocol, ensuring stable connection with various displays. Contact strength is improved by 15%, significantly reducing after-sales issues and enhancing overall reliability. Nylon composite gears with external clutch handle higher torque while keeping operation quiet and extending drivetrain life.

Whether you need a 500W city setup or a 1000W trail rig, this kit delivers factory-grade durability and intuitive torque-sensing assist.

Ride Modes That Adapt to You

Multiple cycling modes put full control on your handlebar. E-Bike Mode delivers direct motor power via thumb throttle. Torque Sensor Assist reads your pedaling force in real time—the harder you pedal, the faster you go. No jerky on/off feeling, just smooth, proportional power that matches your effort. Walk Mode provides low-speed walking assistance when you need to push the bike. Normal Bike Mode shuts the motor off completely for unassisted riding.

Linear Thumb Throttle — Press for Instant Power

The Varstrom motor features a non-gear thumb throttle that delivers intuitive, linear power control. The more you press, the stronger the output—press to the limit for full power. No preset power levels, just seamless acceleration that responds directly to your thumb input.

Wide Compatibility — Check Before You Buy

Our kits fit bikes with a bottom-bracket inner diameter of 33.5mm to 36mm and threaded BSA shells. All TSDZ2B, Z8, and TSDZ16 motors suit 68–73mm bracket lengths.

Compatible with mountain bikes, road bikes, hybrids, folding bikes, and commuter bikes. Not recommended for carbon-fiber frames or coaster-brake bicycles. Please measure your bottom-bracket width and inner diameter before ordering. Send us a photo if you are unsure — we will confirm fitment within 24 hours.

Mid-Drive Power for Every Rider

TSDZ16 48V 1000W — The heavy-duty choice. Packs 160N.m of torque for cargo hauling, steep mountain trails, and sand/snow riding. Reaches 50–60 km/h under standard conditions. Features IPX6 water resistance. Supplied with a 46T chainring, designed for extreme off-road and heavy-load applications.

The BB shell wall thickness must be T≤ 12mm for proper installation.

Chainstay Clearance Dimension: ≥50mm.

Fits standard 68–73mm bottom brackets.

Z8 48V 750W — The hill-climbing specialist. Delivers 140N.m of torque and a top speed of 45–55 km/h, handling steep climbs with ease. IP65 rated. Includes a 44T chainring, ideal for hilly terrain and spirited commuting.

The BB shell wall thickness must be T≤ 10.5mm for proper installation.

Chainstay Clearance Dimension: ≥43mm.

Fits standard 68–73mm bottom brackets.

TSDZ2B 48V 500W — Light, efficient, and street-legal friendly. Rated torque reaches 80N.m with a top speed of 38–45 km/h. IP65 rated. Comes with a 42T chainring, offering a good balance for commuting and light trails.

The BB shell wall thickness must be T≤ 8.5mm for proper installation.Chainstay Clearance Dimension: ≥48mm.

Fits standard 68–73mm bottom brackets.

In the Box:

1× Tongsheng mid-drive motor unit (model per your selection)

1× Display (DZ40 /VD18MT / EKD01 / SW2-M58 per your choice)

1× Speed sensor with magnet

1× Chainring (500W: 42T / 750W: 44T / 1000W: 46T )

1× Wiring harness and 1T4 connector cable

1× Thumb throttle

1× Brake levers or brake sensors (Optional)

1× Installation tool set and locking nuts

1× User manual