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mounting caliper brakes on carbon frame?

Posted: Fri Dec 28, 2018 9:55 pm
by Catagory6
do you use the knurled washer?
plain washer?
no washer?

mounting caliper brakes on carbon frame?

Posted: Fri Dec 28, 2018 9:55 pm
by Weenie

mounting caliper brakes on carbon frame?

Posted: Fri Dec 28, 2018 10:07 pm
by Calnago
Knurled, and usually just one unless I need a teensy bit more clearance (usually at the front of the fork leg), in which case I might use two.
There is usually an alloy insert for the brake bolt to pass through in carbon frames (I can’t think of any that don’t off hand). Either way, the knurled insert helps keep things stay put.

Re: mounting caliper brakes on carbon frame?

Posted: Sat Dec 29, 2018 3:07 am
by uraqt
I would guess that the brake brand makes a difference, that said I use thin rubber washer. I think carbon dosn't like the knurled washer cutting into it.. I had no idea that there is a "alloy insert" in the brake bridge.

C

Re: mounting caliper brakes on carbon frame?

Posted: Sat Dec 29, 2018 4:16 am
by Calnago
Rubber (or anything remotely soft or flexible) would be the last thing I want between two pieces where an absolutely solid mount is required, as in the brake/frame interface. I guess if it was super thin then it would essentially be totally flattened out with the tightening torque anyway. But now you have me curious as to just how many frames use an alloy insert if some sort versus simple a carbon lip or insert for the brake net flange to butt up against. I know I said I wasn’t aware of any but I’m sure there are probably more than a few out there these days.