Check
Check rim brakes
Brake blocks, their position on the rim, rim wear and lever feel — a full round of your rim brakes in ten minutes, with hardly any tools.
Easy · 10 minutes
Describe your bike
Service and repair your own bike
A few questions, one per screen. Each one explains how to check the answer on your own bike, and “I don’t know” picks the most common answer for you.
1/12Assistance
Does your bike have electric assistance?
How do I check this on my bike?
- 1. Battery on the down tube
- 2. Motor around the crank axle
- 3. Or a motor in the rear hub, with its cable
Look for a battery and a motor. The battery is a removable block bolted to the down tube or sitting on the rear rack, or a noticeably fat down tube with a key lock. The motor is a bulky housing around the crank axle, or a rear hub much larger than usual with a cable coming out of it. None of that, and the bike is muscle-powered.
What you can do here
Describe your bike
Brakes, drivetrain, wheels, pedals: the questions rebuild your bike, even if you do not know a single brand name.
Check every part
Tap a part on the 3D model to see what it is, then run a full or targeted checkup and note what is wrong.
Fix, adjust, replace
Step-by-step guides with the tools you need and their alternatives, and the right questions to ask before buying a part.
Guides to explore
See all guides- Adjust
Adjust the rear derailleur
Check the hanger, set the H and L limit screws, re-tension the cable, fine-tune indexing with the barrel adjuster, then the B-screw. Crisp, quiet shifting.
Intermediate · 30 minutes
- Clean
Clean and lube the chain
Degrease, dry and lube the chain so it shifts quietly and lasts twice as long. Do it again every few hundred kilometres.
Easy · 20 minutes
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