Brake caliper (105) working loose?
Hello - never had this before but the last two times I've got home from a ride I've found my rear brake caliper (105/5600) has worked loose such that one of the pads is rubbing on the rim due to the spring (no wonder it gets harder to pedal as the ride goes on...!) forcing the pad onto it.
It's a titanium frame, am I doing something wrong here? I've tightened the nut up as tight as I thought I could although maybe not until I'm blue in the face just in case I break something. Is there any sort of treatment I can put on the bolt to stop it from working loose or do I just need to tighten it up even tighter??
Thanks for any help.
It's a titanium frame, am I doing something wrong here? I've tightened the nut up as tight as I thought I could although maybe not until I'm blue in the face just in case I break something. Is there any sort of treatment I can put on the bolt to stop it from working loose or do I just need to tighten it up even tighter??
Thanks for any help.
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Comments
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Have you got a torque wrench? I think they should be tightened to 10nm, but Shimano will have the spec on their site.
Mine have moved from time to time, but when torqued up correctly they stay put.0 -
I do have a torque wrench actually, bought it not long ago, but as yet it hasn't found its way out of the box so maybe this is as good a reason as any :-\0
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Yeah, shimano brake caliper mounting bolts should tighten between 8-10nm, however you should double check any specifications for your frame in case they quote a different max torque.0
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Just re-set the caliper and nipped up the bolt then used the torque wrench - appears I'd already tightened up to at least 10Nm. What's the next plan if "tight" is not tight enough then? Thread lock??0
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Make sure the brake bridge counterbore and the nut are both clean. If there's any crud beneath the head of the screw if can creep out over time releasing the tension in the screw.
Aside from that, just do it up a bit tighter. Torque wrenches are not the most accurate devices in the world and I often find that bike torque recommendations tend to be a bit conservative.- - - - - - - - - -
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