You are reading a single comment by @Alexnharvey 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.
@Alexnharvey
I wanted to post a follow-up. I think we got off in the wrong track here with the sprocket radius idea. While what we have said about radius is correct it has missed the point that there is also an additional half link of chain used up with each tooth increase.
Anyway, the axle moves about 1/8 inch with each tooth change, or around 3.2mm rather than 2.