I want to replace the bolt on a red etap rim brake 11sp shifter clamp and not sure of the correct clamp. I bought the group used and noticed the head on one of the bolts was slightly stripped. I secured on the handle bar everything torqued up to spec. I changed the bar and when tightening got the dreaded spinning and no tightening. I got it to where it wont move but its not to spec. Any body know the correct clamp and can I leave everything in place and just replace the bolt? Thanks in advance.