Simply measure your wheels and enter the gear numbers, and Bicycle Gear Calculator will calculate the gear ratios. The measurements can be made and displayed in inches or centimeters, as well as in American and metric standard gearing. Enter your cadence, and you will also be able to display your estimated speed in miles or kilometers per hour. Version Calculating the proper spoke length is a key step in building a bicycle wheel. This software will help both professional and home mechanics calculate the spoke lengths needed for any hub and rim combination quickly and easily.
All measurements are in millimeters, and the calculated spoke length is corrected for spoke stretch.
These are my own derived formula's that I have proofed against other formula and practical experience. Provides printing and previewing of detailed Wheel Maker reports. Version New, upgraded version of the original version. Some Tour de France commentators would benefit from using this. Particularly the ones who think that big riders automatically have a significant advantage when descending, due to extra weight.