I was sitting on my Lynskey and rocked it back and forward with the rear brake fully pulled, i noticed there was quite a lot of movement.
Looking back at my rear brake i noticed the whole calliper flexing back and forward with the rotor. I've tightened all the bolts and it's doing the same thing. I’m not sure if this is because the flat mount section of the chain stay is weak, or because I don’t have the proper TRP mounting bolts.
Is that normal? it's a flat mount trp hy/rd with a 140m rotor. Should i be worried?