Hi All
I’m really not sure how this has happened and am convinced I am the problem and not the brake. I’ll try and explain. This relates to my Shimano Tiagra Rear Brake on my road bike, so naturally a rim brake. Like this one:
http://www.wiggle.co.uk/shimano-tiagra-br4700-rear-brake-caliper/
Cleaning my bike today I removed the entire caliper from the bike to give it a clean and inspection. Not really sure what I have now done but if I re-install the entire caliper on the bike and tighten the bolt that attaches it to the frame, the spring sticks and the calipers won’t re-open once pushed together.
However, if I loosen the bolt that attaches the calipers to the frame, the spring works again and is “springy” when I push the calipers together with my fingers. To achieve this though, the bolt attaching the entire caliper unit has to be loosened way, way too much- to the point where the caliper unit isn’t attached to the frame properly. As soon as I tighten to an appropriate force, the spring sticks again and won’t return 😕
I was out riding yesterday and the brake was working fine.
The cable is completely un-tensioned so it’s not a cable issue.
This has got to be me missing something obvious, right?
I thought there may be a spring tension adjustment bolt maybe but it seems there isn’t. Also even if there was, I wouldn’t have touched it anyway.
Does any of that make sense?!