Thinking of building some wheels? FreeSpoke is a powerful spoke length calculator with a user-updatable database of rim and hub measurements.
Inspired by the Park Tool TCC spreadsheet, but more powerful, web-based, and compatible with several different tensiometers. Use this utility to help balance the tension of your wheels.
New! Compare any two bicycle drivetrains side-by-side in graph format. Supports many internally-geared hubs.
This calculator uses the same visual style of the main calculator, but has added features for fixed gear applications. (in progress)
The original kstoerz calculator. This provides a unique way to compare and select gear ratios for singlespeed and fixed gear drivetrains.
A mileage logging utility for cyclists. (mothballed project)
copyright 2007-2011 Karl Stoerzinger