I even wrecked a allen key bolt (is that how you call it?) of my rear break which I can't adjust properly anymore now
Yup! You mean the one who secures the caliper? I did the same on the front break =/
Look it up RiderAce or ThinkRider torque wrenchs on Aliexpress -- great quality for the value.
It's the one to adjust the pads. This one:
Thabks for the tip. I will check it out!
Oh yeah, is there a way to replace that bolt? Maybe you could super glue a cheap allen key just to remove the bolt and then screw a new one
I don't think so. It's on the inside of the caliper. It's working now and I adjust the pads with tightening the cable, but the finer adjustment with the allen key cannot be done. And a new brake is quite expensive, so I will leave it for now.
Sure, makes sense. Or you could migrate to hydraulics, though I think it would me even more expensive.
For now they work fine, so replacement isn't needed yet.
In the long term I want to buy a new bicycle. Then I would go for hydronic disc brakes.