Does anyone torque their chainring bolts? If so what too? I suspect it wont need much.
Also do you/would you use locktite on them?
I’ve recently replaced my front chain ring and have found the bolts loosen up quite easily, and yes I’m doing them up tight with the correct tools (I’ve been a mechanic for more than a few years)
Or are there any ‘good’ chain ring bolts on the market to buy?
I’ve snapped a few alloy ones over tightening them (this is after unscrewing / screwing them a few times). I’ve heard the steel ones are the best. Never used loctite, but I’ve considered it. I just dab a bit of grease on the threads before screwing them together.
What I like about my Sugino 75’s is that the bolt screws into the crank. No dicking around with tools.
I’ve never had any problems with chainring bolts, cheap through to DA. I’ll always check them after the first ride ride though. I don’t bother to use a torque wrench - I just use a long (~20cm) allen key with firm pressure. I’m sure you know, but for others reading, make sure the threads are clean and greased. I don’t like using loctite in general.
One problem I’ve seen on some crank conversions is that the stack bolts don’t clamp down on the chainring and crank sufficiently - they bottom out ever so slightly and can then vibrate loose. This can happen with combinations like road double stack bolts and an extra thick track chainring, or using track stack bolts and a 3/32 chain ring.
Shimano advises 12Nm on DA road cranks, though I’ve seen 12-16Nm on others.
Cheers for the replies guys. I’ll try torquing them to 12nm and see how I go if that fails will re torque with loctite.
Don’t worry rolly they wouldn’t (fingers crossed) have used Loctite 277 on yours only 243 super nut lock hopefully.
Not really on the topic but I didn’t want to start a new thread for this.
I’ve got an intermittent clicking noise when pedalling that i can reproduce on both sides generally when I put a lot of weight on the pedals at low speed. Initially I thought it was the clips moving around on the pedal -no. Then made sure pedals were tight. I will check the chainring bolts today but I don’t think its that.
The only other things that I can think of seem unlikely (and bad). Bottom bracket moving in shell (relatively new soma frame with reall good threads when I installed it so don’t think its this) or cranks moving on the spindle (the noise is a very solid click part way through the pedal stroke and I don’t think that the cranks would create that sort of noise on the spindle if they were being rounded out because I torqued them up too high).
I think I’ve had a very similar problem to this recently, so I gave the whole drivetrain area a look over, and it ended up being loose chainring bolts that were the cause. Try making sure they’re nice and tight. Solved the noise problem for me.