Originally Posted by
Kaben
Do you still need to glue knurled chain ring bolts?
I will be setting up my new dura ace cranks soon and the bolts that come with it are knurled on the female side. Is that knurling enough to keep them in the back of the crank spider?
Nope. You will need a large slot screwdriver or chainring tool to install them. The knurls are just slightly larger than the outside diameter of the hole, and as you tighten the bolts, they get pulled in. The tool is just to help the process get started, as once they have bitten into the back of the spider enough, they will stop rotating and jut get pulled in. IF you strip one that's already installed, you will have to hammer it out.