if they keep coming loose when seeimgly done up tight, it could be that they are not narrow enough. The bolt needs to be clamping against the surface of the chainring & spider. If it isnt (the bolt mereley reaching the end of its threads) it is likeley to come loose, some washers or narrower bolts will help you here.
if they keep coming loose when seeimgly done up tight, it could be that they are not narrow enough. The bolt needs to be clamping against the surface of the chainring & spider. If it isnt (the bolt mereley reaching the end of its threads) it is likeley to come loose, some washers or narrower bolts will help you here.