You are reading a single comment by @saxby's 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.
@saxby's
simplest method in mental arithmetic is to divide chainwheel teeth by rear cog teeth then times wheelsize
ie: 48t chainwheel divided by 17t sprocket times 27" wheel = 76 inches