How to Tell If Your Bike Needs a Tune-Up
Six signs your bike is overdue. Most are cheap if you catch them early and expensive if you wait.
Your bike rides fine. Mostly. There is a click somewhere when you pedal hard. The shifting is a little clunky between two specific gears. The brakes feel slightly less crisp than they used to. Each thing on its own is small enough to ignore. Together, they are your bike telling you it is overdue.<br/><br/>Bike maintenance is one of those things where small problems become expensive problems if you let them ride. A worn chain that costs fifteen dollars to replace becomes a worn cassette that costs eighty if you wait. Here are the signs that mean book the appointment.
Six diagnostic signs, ranked from cheap-fix to expensive-if-you-wait.
The chain skips under load
You stand up to pedal hard and the chain jumps a tooth. This is almost always a stretched chain wearing into a worn cassette. A new chain on a worn cassette will skip even worse — at this point you usually need both. A chain checker tool costs ten dollars and tells you in five seconds. If your chain is past the wear line, it is past time.
Shifting hesitates or lands in the wrong gear
You shift, and there is a delay, or it goes one gear past where you wanted, or it makes a grinding sound for a few seconds before settling. This is usually cable stretch or a derailleur hanger that has been tweaked. Cable stretch is a five-minute adjustment. A bent hanger is also five minutes if you have the tool. Both are cheap if caught early; both can damage shift components if ridden long.
The brakes squeal or grab
A small squeak after rain is normal. A constant squeal, a grab that lurches you forward, or pads that scrape even when you are not braking — these are all signs of pad contamination, glazed pads, or misaligned calipers. Pads are cheap. Rotors are not. If you ride contaminated pads long enough you eat into the rotor and the bill triples.
Clicking, ticking, or creaking that is new
Bikes make some sound. New sounds mean something has changed. A click on every pedal stroke can be a loose crank, a dry pedal bearing, or a bottom bracket starting to fail. The earlier you investigate, the cheaper. A pedal that needs grease costs nothing. A bottom bracket replacement is sixty dollars in parts plus an hour of labor.
The handlebar or the seat shifts under you
If you can twist the handlebar against the front wheel, the headset or stem is loose. If the saddle moves, the seatpost clamp or the saddle rails are loose. Both are quick to tighten and dangerous to ignore — a moving handlebar can fail at speed. Check by holding the front brake and rocking the bike forward and back. Any clunk or wiggle in the front end means tighten now.
Diagnose the problem before you spend money.
Describe what you are hearing or feeling and Bike Medic narrows it to the actual cause. You get the fix steps, parts list, and a clear answer on whether you can do it yourself.