When to Replace and Lube a Bicycle Chain

Step-by-step instructions

1. 1

   Check chain wear first

   Shift onto the small chainring and a middle cassette cog. Insert the checker according to its instructions. Replace a 9–12 speed chain at 0.5% wear; follow the chain maker’s guidance for other drivetrains. Do not force the tool.

   Tip: A chain that is already beyond its limit can accelerate cassette and chainring wear.
2. 2

   Protect the brakes and remove surface grime

   Keep the bike upright, cover nearby brake parts with a clean rag, and wipe the chain while backpedalling. Brush dirt from the cassette and derailleur pulleys before applying liquid cleaner.
3. 3

   Degrease the drivetrain

   Apply bike-specific degreaser to a rag or chain-cleaning tool rather than flooding the bike. Backpedal several turns, brush the cassette and pulley wheels, then wipe away dissolved grime. Rinse only if the cleaner’s label permits it and avoid spraying bearings.
4. 4

   Dry the chain completely

   Wipe the chain until the rag comes away mostly clean and dry. Moisture or remaining degreaser dilutes fresh lube, so allow extra drying time after a wet wash.
5. 5

   Apply a small amount of lube

   Backpedal and place one small drop on each roller, not on the outer plates. Run the chain through the gears to distribute it, then wait for the product’s recommended penetration time.
6. 6

   Wipe off excess and test shift

   Hold a clean rag around the lower chain run and backpedal to remove excess. Shift through every gear on a short, safe test ride. The chain should sound quiet without leaving wet lube on the cassette.