What you need and why it matters
A dirty, dry chain is the fastest way to wear out your drivetrain. Cleaning and oiling it every 150–200 miles keeps your gears shifting crisply and saves you money on replacements. The whole job takes less than 20 minutes once you know the steps.
Gather your supplies
You need chain degreaser (citrus-based degreasers work well and smell better), a chain cleaning tool or an old toothbrush, some clean rags, and bicycle-specific chain lube: either wet lube for rainy conditions or dry lube for dry weather. Avoid WD-40 as a lubricant: it displaces water but doesn't lubricate moving parts.
Wet vs dry lube
Wet lube lasts longer in rain but attracts grit. Dry lube stays cleaner in dry conditions but washes off faster. Match it to your riding environment.
Degrease the chain
Shift to the smallest chainring and smallest rear sprocket so the chain is as straight as possible. If you have a chain cleaning tool, fill it with degreaser, clip it onto the lower run of the chain, and backpedal for 20–30 seconds. Without a tool, apply degreaser directly and scrub with a toothbrush, working around the full length of the chain.
Rinse and dry
Wipe the chain thoroughly with a clean rag, pulling it through your fingers section by section. If you used a lot of degreaser, a light rinse with water followed by a full dry is fine: just make sure no moisture remains before you apply lube. A damp chain traps new grit almost immediately.
Avoid high-pressure water
Blasting a chain with a pressure washer forces water into bearings and bushings, causing rust faster than a dirty chain ever would.
Lubricate and wipe
With the chain clean and dry, apply one drop of lube per link along the inner side of the chain: the part that contacts the rollers. Work slowly around the full chain length. Then wait two to three minutes so the lube can penetrate the rollers properly.
The wipe-off step most people skip
Hold a clean rag lightly around the chain and backpedal for several revolutions. This removes excess surface lube: the part that picks up dirt and turns into grinding paste. The lube you want is inside the rollers, not coating the outside. Your chain should look barely shiny, not wet or black.
Check your work by listening
Take a short ride. A well-lubricated chain runs quietly. If you still hear squeaking or grinding after lubricating, the chain may be worn and due for replacement.
Keep on top of it
Build a quick habit: after every wet ride, wipe the chain dry and re-lube before storing the bike. In dry conditions, check the chain every two to three rides: hold a rag against it and backpedal; if the rag comes away black and greasy, it's time to clean again. Consistent light maintenance beats an occasional deep scrub every time.
Know when to replace the chain
Chains stretch over time. A chain wear indicator tool costs a few dollars and tells you whether the chain has stretched beyond 0.5% or 0.75%: the two common replacement thresholds. Replacing a worn chain before it damages your cassette and chainrings is one of the cheapest maintenance decisions you can make.
How often to clean
A rough guide: wet or muddy rides every time, dry road riding every 150–200 miles, dry trail riding every 50–100 miles.