New tool: saddle height, stem length, and reach from four measurements.

Bike Fit is the 8th tool in Stamptivity — a calculator for getting a starting bike setup right, or checking whether your current one is close.

Enter four body measurements and it works out a starting saddle height, stem length, and bar reach — then checks whether your current setup actually fits those numbers, optionally validated against a video of your riding position. Free, browser-based, no upload — same as every other tool here.