PRACTICAL GUIDE · 4 MIN READ
How to measure your bike seat height
Make a repeatable starting record before changing anything.
Everyday Bike Fit product guide · updated 2026-09-21 · Independent fitter review pending.
Record the bike you actually ride
Write down the model, frame label, shoes, pedals and seat you are using. A measurement is useful only when you know what it describes. Photograph the current setup and the seatpost markings before making changes.
Support the bike upright on level ground. This is a measurement task: do not sit on an unsupported bike while holding a tape measure.
Choose two repeatable points
Find the centre of the bottom bracket: the axle around which the pedal arms turn. Measure from that centre to a marked point on the top of the seat, following a consistent line. Record exactly where your seat mark is and repeat the measurement.
Use millimetres for the bike dimensions in Everyday Bike Fit. A centimetre is ten millimetres. If two readings disagree, reposition the tape and measure again rather than averaging clearly different methods.
A record is not a target
This number preserves your starting position; it does not establish an ideal height. A different seat shape, shoe or pedal can change your contact position even when the recorded number stays the same.
Before adjusting anything, read the component instructions, insertion marks and torque requirements. If you cannot identify the limits or tighten the part correctly, take the record to a shop. Keep the original measurement so a trial can be reversed.