Best Motor Attachment For Bike: 10 Conversion Kits Compared

#1 · Best Overall

1. BAFANG G020 G0900 Hub Motor

Best for: BAFANG 26-inch hub option.

Why it ranks #1: Its 48V 500W and 750W front/rear hub options suit electric conversion buyers, and the listing specifies a 26-inch wheel, disc brake and nine speeds.

A specified 26-inch wheel size gives the BAFANG G020 G0900 listing a clear starting point for buyers comparing hub-motor conversions. It names a 48V 500W or 750W front- or rear-hub motor, with a digital display and aluminum wheel among the listed features.

The 500W and 750W options let buyers compare two listed motor ratings, while the front- or rear-hub description identifies the placement choices named for this kit. A digital display is listed as a special feature, and the aluminum frame and wheel materials give additional construction details. The 26-inch wheel size and disc-brake listing are useful build-screening facts; the battery and display are described as optional components, so included equipment should be checked against the intended setup.

Skip it if you need a supplied 20-inch hub wheel; the LOYALHEARTDY 20-inch kit specifies a 20-inch assembly.

This suits buyers comparing a 26-inch BAFANG hub conversion with 500W or 750W options and front- or rear-hub placement. The display and battery are listed as optional, so component selection is an important boundary.

Listed on Amazon as: BAFANG Ebike Conversion Kit G020 G0900 48V 500W 750W Front/Rear Hub Motor

#2 · Best Chain-Drive Kit

2. FONSOLUM 24V 250W Kit

Best for: Lightweight chain-drive retrofit.

Why it ranks #2: The 24V 250W chain-drive kit lists a motor, chain, freewheel, controller and accelerator, plus stated compatibility with 16- to 28-inch wheels.

At a listed 7.5 pounds, the FONSOLUM 24V, 250W chain-drive motor kit offers a comparatively light component package for a DIY retrofit. Its stated 16-to-28-inch wheel range and standard 0.87-inch handlebars provide two concrete sizing references for buyers planning an electric conversion.

The kit includes a DC motor, chain, freewheel, adapter, controller, mounting plate, and accelerator handle, bringing the named drive and control components together for assembly. Its stated compatibility with 16-to-28-inch wheels and standard 0.87-inch handlebars helps narrow the relevant bicycle and handlebar dimensions before installation. A cable length of about 4.92 feet offers a specified connection reach to consider when routing the cable to the controller.

Skip it if you want a 1500W rear hub setup; the Bdujhit 48V 1500W kit lists that higher motor rating.

Choose this for a DIY chain-drive project when its 24V, 250W motor and listed wheel and handlebar dimensions suit your bicycle. The included components support assembly planning, but the 250W rating sets a clear power boundary.

Listed on Amazon as: Electric Bicycle Motor Kit, 24V 250W E-Bike Conversion Kit, Electric Bicycle Retrofit w/Brushed Controller, DIY Powerful Electric Scooter Motor Kit Chain Drive Convert for 16-28''Wheel

#3 · Best 20-Inch Hub

3. LOYALHEARTDY 20-Inch Hub Kit

Best for: 20-inch off-road hub conversion.

Why it ranks #3: This hub kit specifies a 20-inch wheel, a 48V 1000W brushless motor, a 48V/30A controller and a 280-pound maximum weight recommendation.

A 48V, 1000W brushless hub motor and 45 Nm rated torque define the LOYALHEARTDY kit for riders considering hills, gravel, dirt, or forest roads. Its 20-inch wheel assembly and SW-810LED display combine a specified wheel size with a named display for this electric conversion.

The kit lists a 48V/30A controller and a maximum no-load speed of 42 km/h, giving buyers concrete electrical and speed figures to compare. Its rated 45 Nm torque and stated 280-pound load capacity are relevant when assessing the listed use for daily commuting and light off-roading. The 20-inch wheel specification and disc-brake listing help identify the wheel and brake details to evaluate for a build, while the LED display is included in the product description.

Skip it if you need a 26-inch wheel hub; the BAFANG G020 G0900 listing specifies a 26-inch wheel.

Consider this for a 20-inch-wheel electric conversion aimed at commuting or light off-road routes, with a stated 280-pound capacity. Its speed figure is no-load, and wheel size and the listed disc-brake detail matter when evaluating a build.

Listed on Amazon as: 20" Front/Rear Wheel Hub Electric Bike Conversion Kit, 36V 250W/48V 1000W E-Bike Powerful Hub Motor Kit with SW-810LED Display Waterproof Wire Front/Rear Wheel Hub Assembly Motor Kit (US Stock)

#4 · Highest Listed Power

4. HuaShuani 48V 2000W Kit

Best for: High-power 20-inch hub conversion.

Why it ranks #4: Its 48V 2000W rear hub kit is specified for 20-by-4-inch wheels and includes an LCD display, PAS sensor and five-speed gearing.

A 48V, 2000W rear hub motor is the defining feature of the HuaShuani kit, pairing substantial rated power with a specified 20-by-4-inch wheel size. The listed five-speed settings, cruise function, and LCD display give riders both operating choices and ride information as part of the conversion.

The five adjustable speed gears let riders choose among settings, while fixed-speed cruise offers another listed way to maintain a selected pace. The LCD reports power, speed, mileage, faults, voltage, and current, helping riders monitor multiple system readings from one display. Its 20-by-4-inch wheel specification makes wheel sizing a key compatibility consideration, and the kit includes a hub motor and assembly accessories. The 34-mile-per-hour figure is specified as no-load speed.

Skip it if you need a kit specified for 26-inch wheels; the BAFANG G020 G0900 listing specifies a 26-inch wheel.

This kit suits riders seeking a high-power rear hub conversion with cruise and an information-rich LCD. Check that the specified 20-by-4-inch wheel size matches your build, and treat the listed top-speed figure as no-load.

Listed on Amazon as: Electric Bike Conversion Kit, 48V 2000W Electric Bicycle Rear Wheel Hub Motor Kit for 20 4 inche Wheel Sizes, 5-Speed Gears, Fixed-Speed Cruise, LCD Display, Intelligent PAS Sensor

#5

5. Bdujhit 48V 1500W Kit

Best for: Efficient 20-inch rear hub.

Why it ranks #5: The 48V 1500W rear hub kit lists a 20-inch wheel, seven gears and a PAS sensor, giving buyers several useful conversion details.

An efficiency rating above 82% distinguishes Bdujhit’s 48V, 1500W rear hub kit, with the listing positioning it for commuting and short-distance cycling. The 20-inch rear wheel, PAS sensor, LCD display, and seven gears add practical conversion details for riders comparing wheel size and control options.

The listed PAS sensor supports pedal-assist operation, while the LCD provides a display-based companion to the conversion system. Seven gears give riders selectable gearing, and the 20-inch rear wheel specification narrows the wheel-size match to check before choosing the kit. The brushless, gearless hub motor is paired with a dual-layer rubber wheel; listed rust-, impact-, and scratch-resistant materials speak to durability considerations, while the stated load capacity is about 150 kg.

Skip it if you have a 26-inch bike to convert; the BAFANG G020 G0900 listing specifies a 26-inch wheel.

Consider this for commuting or shorter rides when a 20-inch rear wheel, PAS sensor, and seven gears suit your conversion plan. Its stated wheel size is the key fit boundary, and the listed load capacity is about 150 kg.

Listed on Amazon as: Electric Bicycle Conversion Kit, 48V 1500W Ebike 20" Rear Hub Motor Wheel Kit with PAS Sensor & LCD Display, 7 Gears Electric Snow E-Bike Conversion Kit, Upgrade Brushless Gearless Hub Motor Kit

#6

6. SXQYCH 200W Assist Device

Best for: Long-range daily assist.

Why it ranks #6: This 200W electric assist device lists an 18V 10Ah battery, up to 50 km of assisted range and a maximum assisted speed of 25 km/h.

A stated assisted range of up to 50 km (31 miles) is the SXQYCH’s clearest advantage, giving commuters and everyday riders a way to add electric assistance across longer outings. Its 200W system and 18V 10Ah rechargeable battery pair that range claim with assistance for hills and daily travel.

The 200W assist system is rated for up to 25 km/h, a defined ceiling for riders seeking a boost rather than an unspecified top speed. The 18V 10Ah battery is listed for up to 50 km under typical conditions, which can support longer journeys between charging stops when conditions align. One speed keeps the setup simple, while the listed alloy-steel frame and adjustable handlebars give buyers concrete frame and riding-position details to consider.

Skip it if you need multiple gears for varied terrain; the HuaShuani 48V 2000W kit lists five adjustable speed gears.

Choose this for everyday rides and longer commutes where a stated 50 km assisted range and 25 km/h ceiling suit your needs. Its one-speed listing is a boundary for riders who want selectable gearing on varied routes.

Listed on Amazon as: 50KM Range Bike Assist, Lightweight Bike Motor, Bicycle Assist Device

#7

7. Bikerid 80cc Engine Kit

Best for: 80cc gas kit for 26–28-inch bikes.

Why it ranks #7: The gas engine kit is stated to fit most 26- to 28-inch bicycles and lists a maximum speed of up to 38 km/h.

Compatibility with most 26- to 28-inch bicycles is the Bikerid 80cc kit’s clearest practical feature, letting owners consider a gas conversion while reusing an existing bike. The listing also states a maximum speed of up to 38 km/h and highlights a supplied speedometer.

The 80cc, two-stroke engine identifies the type and displacement of the gas conversion, while the stated 38 km/h maximum speed gives a listed performance reference. A speedometer is included according to the title, so riders have a named way to monitor speed. The stated fit for most 26- to 28-inch bicycles makes wheel size a primary screening point; the listing says major frame modifications are not needed, supporting reuse of a compatible existing bicycle.

Skip it if you have a 20-inch-wheel bicycle; the LOYALHEARTDY 20-inch hub kit specifies that wheel size.

This is for riders considering an 80cc gas conversion on a compatible 26- to 28-inch bicycle and wanting a supplied speedometer. The stated fit range and 38 km/h maximum-speed claim are the key boundaries to weigh.

Listed on Amazon as: 80cc 2 Stroke Bicycle Engine Kit, Gas Motorized Bicycle Conversion Kit with Speedometer, Fits 26" – 28" Bikes

#8

8. Mahugde 110cc Engine Kit

Best for: DIY 110cc gas conversion.

Why it ranks #8: Its 110cc, two-stroke gas kit describes fit for many V-shaped frames with ample triangular space and lists CDI ignition and a 2L fuel tank.

A 110cc, air-cooled two-stroke engine with CDI ignition gives the Mahugde kit its defining gas-conversion setup. It is listed for bicycles with V-shaped frames and ample triangular space, offering DIY builders a specified frame-layout starting point for a motorized-bike project.

The 3 kW maximum power and 6,000-rpm specification describe the engine’s listed output, while foot-pedal starting identifies how the kit is started. A 2L fuel tank is specified for the gas setup, and the stated 16.4:1 total transmission ratio gives builders another concrete drivetrain detail. The compatibility description calls out most bicycles with V-shaped frames and ample triangular space, including mountain, road, and cruiser bikes; frame layout is therefore central to planning installation.

Skip it if you want an electric hub conversion rather than a gas engine; the LOYALHEARTDY 20-inch hub kit is an electric option.

This fits DIY builders considering a gas-powered conversion for a V-shaped-frame bicycle with ample triangular space. Its 110cc two-stroke engine, 2L tank, and foot-pedal start define the setup; frame layout remains an important fit boundary.

Listed on Amazon as: Upgraded 110cc Bicycle Engine Kit, 2-Stroke Gas Motorized Bicycle Conversion Kit for 26" /28" Bikes Fit Petrol Gas Motor Kit Engine Refit Full Set with CDI for DIY Motorized Bicycle Bike (Black)

#9

9. Tiozuiu 110cc Engine Kit

Best for: 110cc short-trip gas kit.

Why it ranks #9: This 110cc two-stroke kit is described for 26- or 28-inch bikes and includes air cooling and a CDI system, though fit details remain limited.

A 110cc two-stroke engine rated up to 6,000 rpm gives the Tiozuiu kit a defined gas-powered conversion profile for commuting and short trips. Its title specifies fit for 26- or 28-inch bikes, making wheel size an immediate point for buyers planning a motorized-bicycle build.

The 6,000-rpm figure describes the engine speed listed for this kit, while the two-stroke gas setup identifies its power type. Air cooling and a CDI system are named in the product title, giving buyers concrete engine-system details to weigh when comparing kits. The stated 26- or 28-inch fit narrows the intended bicycle sizes, and the listed 24.7-pound item weight is relevant when assessing the kit as a conversion package.

Skip it if you need a kit for a 20-inch wheel; the HuaShuani 48V 2000W kit specifies a 20-by-4-inch wheel.

This suits riders planning a gas-powered build for a 26- or 28-inch bicycle and short-trip use. Its 110cc two-stroke, air-cooled CDI setup is the relevant configuration; the stated wheel-size range is the central fit boundary.

Listed on Amazon as: 110CC Bicycle Engine Kit, 2-Stroke Gas Motorized Bicycle Conversion Kit, Gas Powered Engine Motor Kit with Air Cooling and CDI System,Gas Bike Bicycle Motor Engine Kit Fit for 26"or 28" Bikes, Black

#10

10. YIYIBYUS 100cc Engine Kit

Best for: Four-stroke gas conversion.

Why it ranks #10: The listing describes a 100cc four-stroke gas engine with double belt drive, but provides no wheel-size or frame-fit specifications.

A four-stroke gas engine and air-cooling identify the YIYIBYUS kit’s stated conversion type, offering a different engine configuration from two-stroke bicycle kits. The title also names a double belt drive, while the description presents the kit for riders seeking a motorized bicycle for outdoor cycling.

The four-stroke engine and air-cooling are the listed engine characteristics, giving buyers a defined configuration to consider for a gas-powered build. A double belt drive is named in the title, and the listing also includes “Chain” in the title, so the drive description warrants close attention during planning. The supplied facts do not specify wheel size, engine displacement, or output, making those details important unanswered fit and performance considerations before choosing the kit.

Skip it if you need a stated 26- or 28-inch fit; the Tiozuiu 110cc kit specifies those bicycle wheel sizes.

This may suit a buyer specifically considering a four-stroke, air-cooled gas conversion with a double belt drive. The supplied details leave wheel size, displacement, and output unspecified, so those are key boundaries for evaluating fit and performance.

Listed on Amazon as: Bike Motor Kit 100cc Motorized Bike Kit with with Double Belt Drive & Air-Cooling, 4 Stroke Gas Bicycle Engine Conversion Kit Fit for Bikes MTB Petrol Bicycle Engine Kit (Chain)