(The tallest gear on which you can clear the steepest gradient) x a percentage based on individual physiological strengths, weather, and attitude on the day
This would equate to 39x26 for me. Only because I don't have anything smaller.
@Sam 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.
(The tallest gear on which you can clear the steepest gradient) x a percentage based on individual physiological strengths, weather, and attitude on the day