Bike fit calculator

Bought your bike online or second-hand and never had a fit? Grab a measuring tape. In two minutes you’ll have a starting saddle height, stem length, frame size and crank length.

Height

Standing, barefoot.

Inseam

Stand against a wall with a book pressed up between your legs like a saddle. Measure from the floor to the top of the book.

Arm span

Arms straight out to the sides. Fingertip to fingertip.

How do you ride?

Optional: your bike now (gives you more useful advice)

Current saddle height

Centre of the crank axle to the top of the saddle, along the seat tube.

Current stem length

Usually printed on the stem, e.g. 100. For an integrated bar, use the stem length in its size (380 × 100 → 100).

Current crank length

Printed on the inside of the crank arm.