The drivetrain — chain, cassette, chainring, and derailleurs — takes more wear than almost any other part of the bike, and it's also one of the easiest systems to maintain yourself once you know the basics.
Cleaning the chain
A degreaser and a chain-cleaning tool (or just a rag and some elbow grease) removes built-up grime that acts like sandpaper on the chain and cassette. Cleaning after wet or muddy rides matters more than a fixed schedule — dirty conditions accelerate wear far faster than dry ones.
Lubricating correctly
Apply lubricant to a clean, dry chain, let it sit for a minute to penetrate the links, then wipe off the excess. Too much lubricant left on the outside of the chain actually attracts more dirt than it prevents, so wiping down after lubing is as important as the lubricant itself.
Checking for wear
Chains stretch slightly with wear, and a stretched chain accelerates wear on the cassette and chainring if it's not replaced in time. A chain-wear indicator tool is inexpensive and takes the guesswork out of knowing when it's time — catching it early is much cheaper than replacing a chain, cassette, and chainring all at once after riding on a worn chain too long.
When to get a tune-up
Skipped shifts, chain noise that doesn't go away with cleaning and lubrication, or visible wear on the cassette teeth are all good reasons for a professional tune-up rather than continuing to ride it as-is.
Find drivetrain parts and upgrades in our Bike Parts & Drivetrains collection.