In the app it lists a distance from front to rear sprocket, if you know the maximum and minimum values for your dropouts it works nicely
@flickwg started
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.
In the app it lists a distance from front to rear sprocket, if you know the maximum and minimum values for your dropouts it works nicely