Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
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Bit confused with your question, does you bike have caliper brakes or not, the title suggest not, the content suggest you do?
If not, if you don't have a brake arch on the frame / brake arch hole on the fork, these won't work for you, as you need this to mount them.
If you have the holes, and no brakes, an M5 bolt/washer/nut will fit, length as required for your frame/forks.
If you do have caliper brakes, the mount slot in between the caliper & frame/fork, there should be enough thread in the pivot nut if these are added so a change won't be needed at the front (pivot nut), there is only one pivot nut size (length, 10.5mm) for the rear, so not an issue.