You are reading a single comment by @wvm 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.
@wvm
Just bought a new crankset and found that the chainring is slightly off centre. Looking at the chainring the out of trueness is barely visible, probably no more than 1mm but where it is obvious is in the chain tension. The difference between the loose and tight point adds around 20mm to the play in the chain. I cannot use the Sheldon method to adjust the chainring on the spider so it's where it's at.
I understand it's not unusual to have some out of roundness but the question is just how much is acceptable. The offending article is a Stronglight Track 2000 so not the most expensive but not too cheap either.