For some time now I have had little effect when using my rear brake. The brake lever feels firm when I apply it but but the brake has little effect. It is impossible to lock the wheel, (not that I would want to) and using the rear brake alone would not stop me on anything but the gentlest of slopes. I tried new blocks without success, (I use the same blocks on my other bikes and they are fine). I tried a different make of blocks, again, without success. I then called in my mobile bike mechanic and the only fault he could find was that one of the grub screws was cross threaded which I already knew about so he drilled it out and tapped in a larger thread as a tempory measure. It looks a bit Heath Robinson but it works OK. Incidently I have just replaced the wheel but the problem was there while I was still using the old one. The bike was returned yesterday and my mechanic was as baffled as I was and all he could suggest was to replace the brake with a Tektra CR720. Can any of you guys offer a suggestion as to what is going on. I have been using the same bike man for a number of years now and have never had reason to doubt his ability.
View attachment 693210
View attachment 693211
