You are reading a single comment by @crank and its replies.
Click here to read the full conversation.
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.
@crank
Second time I've seen this today.. Gear Inches aren't the distance you move per revolution, they're the the notional diameter of the wheel you'd be running on a penny-farthing-style bike with a 1:1 gear ratio.
Since Circumference=pi x Diameter, you move about 3 times this far per revolution.
3.14 x 69 = 217" == 5.5m
I think this is what Sheldon B calls 'metres development' on his gear calculator.
[ / ped-ant]