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  • Newbie question regarding disc brakes and rotors.

    I'm currently running 160mm disc on my all city, and after a couple of rides I found that my disc was rubbing against the pads, (front and back) I thought it might be an alignment thing and tried to centre the calliper however this didn't really solve anything.

    I was wondering how could have this happen and what are the signs when I need to replace the disc and if so is there any difference in upgrading something like hope disc rotors?

  • you need a new bike obvs

  • is there any difference in upgrading something like hope disc rotors

    When has that ever stopped you before?

  • I was wondering how could have this happen

    The two most obvious things are excessive disc runout and insufficient pad retraction.

    Park Tool have a decent article on measuring and correcting runout. It's less likely with floating rotors.

    Insufficient pad retraction is usually a feature of hydraulic brakes which have been rode hard and put up wet, causing the pistons to stick in the cylinders due to contamination or corrosion. If it's not terminal it can be fixed, sometimes just by external cleaning around the piston seals, otherwise by rebuilding with new seals and possibly pistons. If the cylinder bores are damaged, it's terminal and you need new calipers.

  • Rotors could need trueing

  • Sticky pistons maybe.

    Take it to a LBS and let them deal with it.

  • What discs are you currently running? I had the same issues with my Avid (Sram) rotors and had some friends wit the same issues. Didn't really slow me down and after a few months the pads and discs got a bit of wear and the issue was gone..

    However on my Shimano R785 + RT99 setup I had none of these issues.. I think floating discs are the solution here

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