Bicycle Parts & E-Bike Components

Source drivetrain, braking, and electronic components for road bikes, mountain bikes, gravel rigs, and electric bikes. Search by Shimano series or SRAM model code.

Where to Find Your Model or Part Number

To guarantee 100% compatibility, check these standard locations for model badges, OEM stampings, and serial numbers:

Shimano Components: Stamped on the rear/inner face of the component (e.g. RD-R7000 on rear derailleur)
Frames: Stamped on underside of bottom bracket shell (serial number)
E-Bike Motors: Data sticker on the bottom underside of the motor drive unit (e.g. Bosch Performance Line CX)

Frequently Replaced Components & Spares

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Rear Derailleurs & Hangers

Clutch rear derailleurs and CNC replacement frame hanger brackets

Chains & Hyperglide Cassettes

8, 9, 10, 11, and 12-speed directional chains and wide-range cassettes

Hydraulic Disc Brake Pads

Resin organic, metallic sintered, and semi-metallic disc brake pads

Bottom Brackets

BSA threaded, Hollowtech II, BB30, and PressFit bottom bracket bearings

Common Symptoms & Fault Diagnostics

Observed Symptom	Likely Root Cause	Recommended Action
Gears jump and skip when applying hard pedalling pressure	Elongated/stretched chain skipping over worn cassette teeth	Check chain wear with a chain checker tool and replace chain & cassette
Hydraulic disc brakes feel spongy and lever pulls to handlebar	Air bubbles in hydraulic line or worn brake pads	Inspect pad thickness and perform mineral oil / DOT brake bleed

Compatibility Verification Checklist

Before ordering replacement components, verify these technical specifications to avoid returns:

Match exact drivetrain speed count (e.g. 10-speed vs 11-speed have different cable pull ratios)

Verify brake pad shape code (e.g. Shimano B01S / B05S vs L05A road finned)

How to Photograph Your Part for AI Identification

1Photograph the stamped model code on the inner face of the derailleur or brake calliper.