Bike drivetrain parts guide
Your drivetrain turns pedalling into speed. Keeping it matched and fresh means smoother shifting and longer-lasting parts.
Chains
Match your speed count. Replace a worn chain early to protect your cassette and chainrings.
Cassettes
Check speed count, freehub body and gear range before you buy.
Chainrings
Match bolt pattern or mount type, tooth count and 1x or 2x setup.
Cranks
Choose crank length, axle standard and chainline to suit your frame and riding.
Bottom brackets
Your frame's shell standard and crank axle size decide which bottom bracket fits.
Derailleurs
Match brand, speed count and capacity. A spare derailleur hanger saves a ride.
Upgrading everything? See groupsets, and keep it running smoothly with chain lube.