You are reading a single comment by @qwerty69 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.
@qwerty69
I opted for a cheap sealed unit. Mine was British threaded and is a Shimano Un55 68 x 110
Check what was on the bike when you got it but the shimanos are cheap and well made so in reality all you need is to work out the size.
For me I asked around and was told 68mm (which I confirmed by measuring the diameter of the bb cage) and then didn't do any more than guess on the width; I checked and the original cup and cone and saw 110 stamped on it somewhere so went with that. In reality this was just a semi educated guess as I didn't know if 110 would give a correct chain line but decided I had nothing to lose.