You are reading a single comment by @johnQdarwin 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.
@johnQdarwin
is there a link on here , or anyone know of an online magic gear calculator , or if there is even such a thing at all ??
cheers !!