I have been riding a power2max with 3D24 crank arms and Praxis Buzz chainrings for about two months now. It was delivered with rotor aluminum bolts, that are speced for 7-8Nm and come with some sort of loctite on the threads.
Ever since I assembled the chainrings for the first time - dry and at 7Nm - I am having a terrible creaking while pedalling. After a couple of rides I tightened them to 8Nm - still dry - and the creacking became a bit better but didn't subside. Also it got a bit quieter during the ride, only to be back at full volume at the start of the next ride. I then removed all bolts, cleaned the loctite thing off, applied grease both on the threads and outers of the bolts and reassembled at 8Nm. Creacking still there but much more silent, and even stopped completely towards the end of rides, but was always there at the beginning of rides. So today in desperation I decided that I maybe should try to torque it a bit above specs at 9Nm, which resulted in breaking one bolt.
Any ideas what causes the creaking problem? When I removed the bolts in order to apply grease i noticed that the "nut part" of the bolt had made a tiny groove on the back of the head of the "front" part of the bolt - I hope this description makes sense. So I suspect that somehow the spider and rings are a tiny bit thinner than what the bolts are speced for which results in the front and rear of the bolts tightening into themselves instead of tightening the rings. Is that possible?
Since I now have to replace my bolts anyways, do you have some recommendation for other bolts that are easier to make/keep quiet?
My power2max with 3D24 crank arms and Praxis chainrings (not Buzz) came with Praxis bolts and have been silent both with and without grease.