Best Mid Drive Motor for E-Bike and Motorcycle Builds

#1 · Best Overall

1. Varstrom TSDZ16 1000W

• Voltage: 48 V

Best for: High-Torque TSDZ16 Conversions.

Why it ranks #1: The 48V kit lists 1000W, 160 N·m and a 68–73 mm bottom-bracket fit, giving e-bike builders clear output and mounting details.

The TSDZ16 is specified at 160 N·m, the clearest differentiator for this 48V, 1000W Varstrom torque-sensor kit. Its title also gives a 68–73 mm bottom-bracket range, providing a concrete frame measurement for builders assessing whether this mid-drive can suit their planned conversion.

The 160 N·m torque figure distinguishes this kit for buyers comparing higher-torque options, while the 1000W rating and 48V specification identify its stated electrical configuration. The 68–73 mm bottom-bracket range gives a fit dimension to check against a frame before installation. Because the product is described as a torque-sensor mid-drive kit, it is suited to shoppers specifically seeking that sensor approach; use the stated dimensions and electrical figures to plan the build.

Skip it if you have a bottom bracket outside 68–73 mm; the BAFANG BBS02B / BBS-HD B0FP2HQPY7 title lists 100 and 120 mm options.

This Varstrom kit suits builders seeking a 48V, 1000W torque-sensor mid-drive with a stated 160 N·m figure. Its fit boundary is explicit: the title lists 68–73 mm bottom brackets, so check that measurement against the frame.

Listed on Amazon as: TSDZ16 160N.m 48V 1000W Torque Sensor Mid Drive Kit for 68-73mm BB

#2 · Best Torque Sensor

2. Varstrom VSM01 750W

• Voltage: 48 V

Best for: Torque-Sensing 48V Builds.

Why it ranks #2: Its 750W motor lists 130 N·m, a torque sensor and four ride modes, including throttle-only, pedal assist and walk assist.

A 130 N·m torque-sensor motor is the central draw of Varstrom’s 750W VSM01 kit, with assistance listed up to 28 mph (45 km/h). Four ride modes include throttle-only, torque-sensing assist and walk-assist, giving riders several stated ways to manage assistance across riding and pushing situations.

The torque sensor is described as delivering natural pedal assistance, while the 130 N·m figure and 750W rating identify the motor’s stated output. Four modes include throttle-only cruising, torque-sensing assistance and walk-assist, so the system covers both riding and walking the bike. The listing specifies 48V and assistance up to 28 mph (45 km/h), plus greater than 80% efficiency; use these stated figures when checking the build’s intended operating range.

Skip it if you require assistance beyond 28 mph (45 km/h); this kit’s listed assistance reaches that ceiling.

Choose this Varstrom kit for a 48V build where torque-sensing pedal assistance, walk-assist and throttle-only operation are useful. Its stated assistance ceiling is 28 mph (45 km/h), an important boundary for choosing a system.

Listed on Amazon as: Vastrom VSM01 750W 48V Mid Drive Torque Sensor Motor Ebike Conversion Kit

#3 · Accessory-Rich Kit

3. BAFANG BBS02B BBS-HD Kit

• Voltage: 48 V

Best for: DIY Kit With Included Tools.

Why it ranks #3: This 500W, 750W or 1000W conversion kit lists a display, throttle, speed sensor, chainwheel and removal tool among its accessories.

A bottom-bracket removal tool comes among the listed accessories, giving DIY builders a component for the removal stage of a conversion. This BAFANG kit also lists a brake lever, chainwheel, thumb throttle, speed sensor and headlight, while allowing the battery and LCD display to be selected separately.

The accessory list combines parts for fitting and operating a conversion, including a brake lever, chainwheel, thumb throttle and speed sensor. A bottom-bracket removal tool is also listed, which supports the installation workflow rather than leaving that task unaddressed in the accessory list. The kit is offered in 500W, 750W and 1000W versions, and the title describes adaptable fit; battery and LCD display are optional, so account for them as separate choices.

Skip it if you want a battery and LCD display guaranteed in the package; both are identified as optional here.

This BAFANG kit fits DIY converters who value a broad accessory list and a bottom-bracket removal tool. Choose it only after accounting for the optional battery and display, and selecting the power version appropriate to your build.

Listed on Amazon as: BAFANG BBS02B BBS-HD 500W 750W 1000W Mid Drive Electric Bike Conversion Kit

#4 · Highest Listed Torque

4. BAFANG CAN Bus Kit

• Voltage: 48 V

Best for: Power-Selectable BAFANG Builds.

Why it ranks #4: The CAN Bus kit offers 500W, 750W or 1000W choices, with its 1000W version listed at up to 160 N·m.

Three listed power configurations let this BAFANG kit serve builds seeking different output levels, from 500W to 1000W. CAN Bus technology is specified for smooth power delivery, while the title lists several bottom-bracket widths, making this a candidate for conversion projects that need options in both power and frame fit.

The 500W, 750W and 1000W configurations are paired with stated torque figures of 100, 120 and 160 N·m, respectively, so buyers can choose output around their intended riding demands. The CAN Bus system is described as supporting smooth power delivery, and the title specifies 68–73, 100 and 120 mm bottom-bracket widths. The LCD display is included in the title, while the battery is optional, so plan that part of the build separately.

Skip it if you need a battery included with the conversion kit; this title identifies the battery as optional.

This BAFANG option suits builders choosing among several power levels and bottom-bracket widths who want CAN Bus control and an LCD display. It is less suitable when an included battery is essential to the purchase.

Listed on Amazon as: BAFANG BBS02B / BBS-HD Mid Drive Motor Kit,36V/48V/52V 1000W/750W CAN Bus Ebike Conversion Kit with LCD Display, USB Programmable, Fits 68-73/100/120mm Bottom Bracket, Battery Optional

#5

5. Varstrom TSDZ Torque Kit

Best for: Torque-Sensor Kit Shoppers.

Why it ranks #5: This torque-sensor mid-drive kit is offered in 500W, 750W and 1000W versions and includes a one-year warranty and lifelong technical guidance.

A torque-sensor mid-drive format is the defining feature of this Varstrom kit, aimed at builders who specifically want that sensor type in a 500W, 750W or 1000W conversion. The supplied specifications also identify an LCD display, aluminum frame material and a 26-inch wheel-size entry.

The torque-sensor designation gives this kit a clear starting point for shoppers comparing sensing approaches, while the three listed power levels let a build target 500W, 750W or 1000W. An LCD display is identified as a special feature, offering a stated display component in the product specifications. The listing also records aluminum frame material, a 26-inch wheel size and nine speeds; verify those entries against your specific conversion plans before buying.

Skip it if you need stated torque and top-speed figures before choosing a version; this listing supplies power options but no such figures.

This Varstrom kit suits shoppers who prioritize a torque-sensor label and want an LCD display listed among the features. The supplied details are limited, so buyers needing specific torque or speed targets should seek those figures before choosing.

Listed on Amazon as: TSDZ-2B Z8 TSDZ16 500W 750W 1000W Torque Sensor Mid Drive Kit

#6

6. Varstrom TSDZ2B Z8 TSDZ16

Best for: Protocol-Matched Commuter Builds.

Why it ranks #6: The listing compares three kit families, with stated torque from 80 to 160 N·m and peak speeds from 45 to 60 km/h.

A bidirectional free-wheeling clutch lets you pedal with motor-out power without the drag associated with traditional one-way clutches. Varstrom’s TSDZ2B, Z8 and TSDZ16 options also span different torque and speed figures, giving conversion builders a choice of performance level within this kit family.

The upgraded 1T4 main wiring supports displays using the Tong-sheng communication protocol, which gives builders more display choices within that protocol. The free-wheeling clutch matters if you need to pedal when motor power is out, since the listing says it eliminates drag from traditional one-way clutches. Model figures differ substantially: the TSDZ2B is listed at 80 N·m and 45 km/h, while the Z8 and TSDZ16 reach 140 and 160 N·m respectively.

Skip it if you need a complete, explicitly itemized accessory bundle; the supplied listing focuses on motor and wiring features.

Choose this Varstrom family if you want a mid-drive conversion with motor-out pedaling and a choice among three stated torque levels. Check which model and Tong-sheng-protocol display suit your build before selecting.

Listed on Amazon as: TSDZ2B Z8 TSDZ16 48V 250W 500W 750W 1000W Mid Drive Kit for Ebike

#7

7. BAFANG UART Motor

• Voltage: 36 V

Best for: Motor-Only BAFANG Replacements.

Why it ranks #7: This BAFANG motor offers 36V and wattage options across the range, but the listing says the box contains only the motor, not conversion parts.

This listing is explicitly for a motor only: its packing details say the 36V 500W BAFANG motor arrives without other bike assembly parts. That makes it a component-focused option for builders who already have the required conversion hardware, rather than shoppers expecting a complete kit.

The BBS01B, BBS02B and BBSHD family is described as compatible with mountain, road and commuter bikes, with a 34 mm lower-bracket diameter and standard JIS 68 mm specification. The listing names a 36V 500W motor and states that the box contains no other bike assembly parts. That distinction affects installation planning: buyers must source any needed assembly accessories separately. The motor’s stated maximum torque is 100 N·m.

Skip it if you need a complete conversion kit with assembly accessories; the BAFANG BBS02B BBS-HD B0DL5G6XWN lists a broader accessory set.

This BAFANG motor suits a builder replacing or sourcing a motor for a project with other required parts already arranged. It is not the pick for a one-box conversion, since the listing explicitly excludes other assembly components.

Listed on Amazon as: BAFANG 36V/48V 250W/500W/750W/1000W UART Version Mid Drive Kits

#8 · Motorcycle Build

8. Mechanivis QS138 3kW

Best for: Motorcycle Terrain Conversions.

Why it ranks #8: The 3kW QS138 PMSM mid-drive is designed for electric motorcycles, mopeds and dirt bikes, rather than standard bicycle conversions.

A 1:2.35 internal reduction gear amplifies torque for steep slopes and complex terrain, distinguishing this 3000W QS138 V3 mid-drive from ordinary bicycle conversion kits. Its listing targets electric motorcycles, mopeds and dirt bikes, with modular motor, controller and sensor construction intended to make individual component replacement possible during maintenance.

The internal reduction gears amplify torque, a practical match for the steep slopes and mountain terrain named in the listing. The motor, controller and sensor are highly integrated, yet parts can be replaced separately, which can make maintenance more targeted than replacing the entire assembly. Its compatibility is described across vehicles with different wheel diameters and tire types, while center placement is said to improve driving stability. The product is listed as a 3000W PMSM motor.

Skip it if you are converting a commuter bicycle and need a low-power kit; the BAFANG BBS02B BBS-HD B0DL5G6XWN is listed in 500W, 750W and 1000W versions.

Consider this Mechanivis motor for an electric motorcycle, moped or dirt bike tackling steep or varied terrain, particularly if modular servicing matters. Its 3000W specification makes it a different scale of build from a conventional commuter conversion.

Listed on Amazon as: Mid Drive Motor, QS138 70H 3000W V3 100kmh PMSM Mid-Drive Motor with 1:2.35 Internal Reduction Gears for Electric Motorcycle Moped Dirtbike

#9

9. GregYoung QS165 72V

Best for: 72V Motorcycle Motor Projects.

Why it ranks #9: This 72V QS165 motor with an internal gearbox targets electric motorcycles and dirt bikes, so it is not a typical e-bike conversion choice.

The 72V QS165-50H is identified as a PMSM mid-drive motor with an internal gearbox, making it a motorcycle or dirt-bike project component rather than a complete conversion bundle. Its title lists 4000W, while the additional description uses a different wattage figure, so confirm the intended specification before committing.

An internal gearbox is the key mechanical feature named for this motor, and the title positions it for electric motorcycle and dirt-bike use. The 72V specification and QS165-50H model identify the listed platform, while the product details name metal construction and a 33-pound item weight. Only the mid-drive motor is listed as an included component, so plan the rest of a project around separately sourced parts and resolve the conflicting wattage descriptions first.

Skip it if you need an unambiguous wattage specification before selecting a motor; this listing gives conflicting 4000W and 5000W figures.

This GregYoung listing may suit a motorcycle or dirt-bike builder seeking a 72V QS165 motor with an internal gearbox. The wattage conflict is a material boundary: establish which figure applies before planning the rest of the system.

Listed on Amazon as: 72v Mid Drive Motor,QS165 4000W 50H PMSM Motor,High Torque Electric Motorcycle Dirt Bike Mid Drive Motor with Internal Gearbox

#10

10. Mechanivis SIA200-50

Best for: Encoder Motor Kit Assemblies.

Why it ranks #10: The listing describes a 12kW PMSM motor kit and Fardriver controller for high-power vehicle builds, making it the least suitable everyday bicycle option.

This Mechanivis listing identifies a Fardriver encoder motor alongside an ND721200B controller and adapter, giving project builders several named drive-system components together. The title cites a 1:2.04 gear ratio and IP67 motor, while the included-item description names a 12kW PMSM motor and 520 14T sprocket.

The listed 1:2.04 gear ratio connects to the product’s broader description of gear reduction amplifying torque for steep or complex terrain. The motor, controller and sensor are described as highly integrated, with parts replaceable separately during maintenance. The included-item description names the Fardriver ND721200B controller, adapter and 520 14T sprocket, useful details for planning a project around the supplied assembly. The title also specifies an IP67 motor.

Skip it if you need one consistent power rating for component planning; the title and included-item description give different figures.

This Mechanivis assembly suits experienced project builders seeking a Fardriver encoder motor package with named controller and sprocket components. Treat the 26kW and 12kW descriptions as a specification boundary to resolve before matching the system.

Listed on Amazon as: Mid Drive Motor, Mid Drive Motor Peak 26kW 92N.m PMSM Motor with 1:2.04 Gear Ratio IP67 Motor with ND721200B Fardriver Controller Encoder SIA200-50