Originally Posted by
vailskier3
pardon my ignorance...how do i measure chainline? is that the distance from the frame to the chainring in mm?
Close! The distance from the
centerline of the frame to the chainring. On a fixed-gear, you want the distance to the chainring and from the centerline of the rear hub to the cog to be as close to the same as possible. As mentioned earlier in the thread, it's okay to be a couple millimeters off, but I would try measuring what you have and possibly order a shorter bottom bracket if you're much over 42mm:
https://sheldonbrown.com/chainline.html