Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
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.