A tool for bike geometry comparison of up to 4 bikes. Includes bike fit parameters. Check the “Include Cockpit Fit Measurements” button at the bottom of the form to view additional inputs and calculated measurements for optional bike fit comparison. 

Click here for a figure demonstrating the geometry measurements included in this calculator. Read this blog post for tips on entering the geometry of mullet (mixed wheel) bikes. 

Note that manufacturers usually round their measurements so the wheelbase, effective top tube, etc. calculated here are shown with decimal places not likely to be shown on the official geometry table.

The bike overlays look best on desktop computers.