Electric Bike Parts List & Replacement Guide

Use this electric bike parts list to identify common replacement components, understand what each part does, and check compatibility before ordering. E-bike parts are not always universal, so compare your bike model, voltage, connector, dimensions, and mounting position with the original component.

Shop electric bike replacement parts or use the model-specific links below for a faster match.

Electrical and control parts

Controller: Regulates power between the battery, motor, display, throttle, and pedal-assist system. Match voltage, motor wattage, connector style, and wiring layout.
Display: Shows speed, assist level, trip information, and system status. A display must use the correct communication protocol and connector.
Throttle: Provides motor power from the handlebar. Check voltage compatibility, connector type, and whether you need a left- or right-side throttle.
Pedal-assist sensor: Detects pedaling and activates motor assistance. Match the sensor style, magnet count, crank position, and cable connection.
Charger: Match the battery's rated voltage, charging plug, polarity, and charge-current requirements exactly.
Wiring harness and cables: Connect electrical components. Compare every plug, pin count, cable length, and male or female orientation.

Motor and drivetrain parts

Hub or mid-drive motor: Match wheel size, voltage, wattage, dropout width, axle type, brake mounting, and connector.
Crankset and chainring: Check crank length, chainring tooth count, bottom-bracket interface, and chainline.
Chain: Choose a chain that matches the number of rear gears and drivetrain width.
Freewheel or cassette: Match the gear count, tooth range, mounting system, and derailleur capacity.
Derailleur and shifter: Match the number of speeds, cable-pull system, mounting style, and maximum sprocket size.

Brake parts

Brake levers: Verify left or right orientation, hydraulic or mechanical operation, hose or cable connection, and motor cut-off wiring.
Brake calipers: Match hydraulic or mechanical type, front or rear position, mounting standard, rotor size, and hose fitting.
Brake pads: Pad shape must match the exact caliper model. Compare the old pad before ordering.
Brake rotors: Check diameter, thickness, and six-bolt or center-lock mounting.

Wheels, tires, and inner tubes

Tires: Read the size printed on the tire sidewall, such as 20x4.0 or 26x4.0. Match diameter, width, tread style, and rim compatibility.
Inner tubes: Match the tire-size range, valve type, valve length, and valve angle. Browse fat bike tires and inner tubes.
Rims and wheels: Check diameter, width, axle, spoke count, brake mounting, and motor compatibility.
Fenders: Match wheel diameter, tire clearance, mounting points, and front or rear position.

Contact points and accessories

Handlebar grips: Match handlebar diameter, grip length, and throttle-side length.
Stem and handlebar: Check clamp diameter, steerer diameter, reach, rise, and mounting style.
Saddle and seatpost: Match seatpost diameter, rail clamp, length, and load rating.
Rack, bag, light, mirror, and lock: Confirm mounting dimensions, clearance, electrical voltage when applicable, and weight capacity.

How to confirm the correct replacement part

Find the bike model and model year.
Photograph the original part, label, connector, and mounting location.
Record voltage, wattage, tire size, measurements, and left or right orientation.
Compare connector shape and pin count; similar-looking plugs may use different wiring.
Check the product description and images before ordering.

Find Kasen parts by model

If you are unsure about compatibility, contact Kasen Bikes with photos of your original part and connector before ordering.