Rory Semple Posted July 28, 2018 Report Share Posted July 28, 2018 About to go for a ride and noticed the rear rotor was really loose. Turns out that two of them have sheared halfway down meaning I can’t unscrew them. Whats the best way to try getting them out? Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted July 28, 2018 Report Share Posted July 28, 2018 Where exactly do you mean by halfway down, Rory? Flush/lower than the face of the hub mount is going to be a bit tricky to remove, though if it's above this then you should be able to remove the rotor and remove the studs with some molegrips (no head on the bolts means no tension on the threads so they'll be easy to whizz out, other than any corrosion going on inside). If there's nothing standing proud of the mount to grab hold of, then you'll need to drill them out, or get someone experienced to help if you're not too confident doing so yourself Be careful not to over-torque the new rotor bolts when you refit the rotor. They only need a pretty low torque and doing them more than is necessary will do more harm than good. Quote Link to comment Share on other sites More sharing options...
ScottM Posted July 29, 2018 Report Share Posted July 29, 2018 If they are broken down inside the hub mount the best thing I have found for that kind of thing are left-handed drill bits. Center punch the bolt first then start drilling into it with the left-handed bit and at some point it should catch and come right out. Quote Link to comment Share on other sites More sharing options...
Rory Semple Posted August 1, 2018 Author Report Share Posted August 1, 2018 Thanks for the tips! I’ve managed to get the first one out. It was sitting very slightly proud of the hub, but not enough to grip with mole grips/pliers. I used a very small chisel and a hammer and managed to slowly tap it round enough so that I could get the mole grips to grab it. will most certainly need to drill the other one out as it is sheared near the bottom of the hole. Quote Link to comment Share on other sites More sharing options...
TBoneWilson Posted August 1, 2018 Report Share Posted August 1, 2018 Use a 3mm drill then wedge an Allen key in there. Quote Link to comment Share on other sites More sharing options...
trialsalot Posted August 1, 2018 Report Share Posted August 1, 2018 Is there loctite on the bolts? I'm guessing so. I've removed a bolt before by super gluing (extremely carefully) a smaller bolt to the sheared of part and unscrewed it. It had no loctite and the threads were clean. Bit of heat will help melt the loctite too, again very carefully! Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 2, 2018 Report Share Posted August 2, 2018 Almost all rotors bolt you buy now will have threadlock pre-applied unless they're ti upgrade bolts or similar. Hope, SRAM, Shimano, Magura, etc. all use threadlock as standard. 2 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.