Hi I have a Bianchi San Jose. It has Sugino cranks with a single chainring in the front (it was originally a single speed). I removed the smooth black chainring guard disc in order to install an actual chainguard.
The problem is now that the 2mm thick disc is gone, the chainring/crankarm bolts are 2mm too long. I went to the hardware store and got some 2mm washers and used those to fit the bolts, but two of them came loose last night (after about a week and a half).
My question is should I try to get thicker washers, or are there shorter bolts available?
For reference I believe my bolts are 10.5 mm long. I can post a picture if that helps...