Or here. http://www.bicyclesource.com/bike/gear/gear-javascript.html
@JOL started 17 years ago
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Or here.
http://www.bicyclesource.com/bike/gear/gear-javascript.html