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hello. I'm building a frame up and it's been my first encounter with flat mount calipers front and rear. The rear caliper was easy to centre up but I couldn't get the front one to run without the rotor touching the pad or feeling squishy at the lever
I concluded the fork mounts are slightly off axis and took a file to the adapter to correct the offset - successfully it turns out - but I'm curious if this is just a duff job and most of them are perfect or if the design itself is a bit intolerant of slight manufacturing defects.
With a post mount you have a bit of space to run some domed washers or face the mounts but with only a thin plate to fix the caliper to on the fork, there's not much room for error adjustment.
Yes on my carbon forks as well, didnt want to file any thing downso used some old avid washers.
how far out did that move the caliper scruff? Presumably the pads are still grabbing enough rotor?
Just to be clear I filed the mounting plate - not the fork. I'm prepared to sacrifice a few quid of aluminium to my bodging skills but not a £100+ bit of fancy plastic
I have had to face a few, I use the Park DT-5.2 facing tool.
Some its just cleaning up paint, some the mount face is out.
Have seen plenty needing facing, again with a Park DT-5.2
I've got the old IS facing tool which was fine as it was just a hole. However, if a post mount is off, isn't there the chance if the thread being off and therefore reducing the amount of effective correction you can make?
thanks - good to know it's not too un-common. The mounting points on my fork (I think they are aluminium) are embedded into the carbon and the surface is flush so can the facing tool face-off the carbon as well without splintering it?