Get a small piece of scotchbrite (the green washing up pads) and stuff it into the nut, hold it in there tight with your fingers and tighten the bolt. as above or look in kitchen drawer for a big knife etc.
How much does it cost to tighten chainring bolts?
A Shimano “General Operations” manual states the tightening torque for road chainwheels is 12-14 N-m. For mountain bike chainwheels it’s upped to 14-16 N-m for large and middle ring and 16-17 N-m for the smallest ring of a triple.
How do you drill out a chainring bolt?
You can hold the bolt in place with an allen key or torx from the front. If they’re two-piece steel ones, use a conical grinding stone and do the same. The countersink or drill bit will catch and snap on the existing hole in the chainring bolt.
Are chainring bolts universal?
Each chainring bolt – the number will vary depending on the chainset design, but is usually four or five – consists of two parts, a female-threaded ‘outer’ part and a matching male ‘inner’. The outer nut has a standard external diameter of 10mm so theoretically the bolts can be used to fit any chainset.
Do you put Loctite on chainring bolts?
Chainring bolts don’t need much torque and they rarely come loose (i’m inclined to say never). Loctite will just make removal more difficult, and generous coat of grease will prevent corrosion just fine in practice.
What torque should chainring bolts?
|Chainring bolt (steel)||Truvativ®||12.1~14 Nm|
|Chainring bolt (aluminum)||Shimano®||5~10 Nm|
|Chainring spider to crank arm||Shimano®||50~70 Nm|
Do you need Loctite on chainring bolts?
It won’t harm anything. But it’s not needed. When properly tightened, chainring bolts don’t come loose.
How do you remove a bolt that keeps spinning?
Best way: put a wrench on the nut and the proper driver or socket into or over the head of the bolt, and turn one while keeping the other stationary. Second best way: put a wrench on the nut, and a pair of locking pliers on the shank of the bolt.