If your drivetrain is squeaking, your shifts feel gritty, or your chain looks dry and dull instead of lightly oily, it's time for a lube job. This is the single most impactful piece of maintenance you can do for your bike, and also the most commonly done wrong — most people just drip oil on a dirty chain and call it done, which does more harm than good. This guide covers the full process: clean, dry, lube, wipe.
This applies to any derailleur or single-speed chain, road or mountain. Budget 15-20 minutes, most of which is just letting things dry.
Chains pick up grit constantly, and that grit acts like sandpaper between the rollers and your cassette and chainrings once the lubricant dries out. Lubing more often in wet or muddy conditions, and less often if you ride mostly dry pavement, is the general rule.
Put the chain in a middle gear so it's easy to backpedal through the whole drivetrain without the derailleur fighting you. If your bike is in a stand, this also keeps the chain taut and easy to work with.
Apply degreaser to a rag and hold it loosely around the chain while backpedaling, or run the chain through a chain cleaning tool filled with degreaser. Either way, keep backpedaling until the rag stops coming away black. Don't skip this step even if the chain "looks fine" — old lube holds grit, and lubing over that grit just grinds it deeper into the rollers.
While you're in there, use the stiff brush on the cassette cogs and chainring teeth. This is easy to skip but grime here transfers straight back onto a freshly cleaned chain within a few pedal strokes.
Wipe the chain down with a clean, dry rag, backpedaling through several full rotations to get every link. The chain needs to be fully dry before the next step — lube applied over degreaser or water won't bond properly and will just run off.
Hold the lube bottle over the top of the lower chain run (where the chain is moving toward you as you backpedal) and apply one drop per link directly onto the rollers, not the outer side plates. Go slowly enough that you can actually hit each link rather than spraying the whole length at once.
Give the lube a few minutes to penetrate into the rollers and pins, where it actually needs to be. Most lube bottles will tell you a wait time on the label — follow it rather than guessing.
Backpedal the chain through a rag held snugly around it, several full rotations, until the rag comes away mostly clean. This is the step most people skip, and it's the one that matters most: excess lube on the outside of the chain does nothing for lubrication and just collects dust and grit, which turns into the grinding paste that wears out your drivetrain.
Shift through the full range of gears and backpedal to check for smooth, quiet running. A properly lubed chain should look lightly satin, not shiny-wet and not dry and dull.
A basic clean-and-lube is about as accessible as bike maintenance gets, and there's rarely a reason to pay someone else to do it. That said, if your chain is stretched (worth checking with a chain wear tool), skipping and jumping under load even after a fresh lube, or visibly rusted with stiff links that won't work loose, you're looking at a chain replacement rather than a lube job — a shop can measure wear and recommend a full drivetrain check if things look further gone than expected.
Still hearing noise after a fresh lube? That's often a worn cassette or a derailleur adjustment issue, not a lubrication problem — worth checking separately before you reach for the oil again.