The bike knowledge base.

Clear, correct guides to keeping a bicycle running well — how to maintain it, how the different kinds of bike differ, and what has genuinely changed between an older bike and a new one.

About these guides

Written to be accurate rather than exhaustive. Figures — torque values, tyre pressures, wear limits — are sensible starting points, but a component or frame maker's own spec always takes priority. When a job affects braking, steering or the frame, and you're not sure, a bike shop is cheaper than a crash.