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Hydro brakes and when to replace the pads?

Discussion in 'Bicycle Mechanics and Repairs' started by Spud1969, 9 Jan 2017.

  1. Spud1969

    Spud1969 Regular

    I'm sure this has been asked 100s of times before so please forgive me, but I just bought a new bike with Tektro hydro brakes and it's my first experience of hydro brakes.
    This may sound like a stupid question, but I just wondered what to look out for to know when the brake pads need replacing or is it just when they start to be less effective?
  2. Brandane

    Brandane Guru

    They should be replaced when there is less than 1mm or so of pad material on the metal backing plate. You can see if you look into the caliper, but you might need to clean away some of the built up crud; and you need to know what you're looking for. Once you hear metal to metal when braking, that's the backing plate rubbing against the disc rotor and you're in trouble. You will then need to replace the rotor as well as the pads as it will be scored. RoadCC probably explains it better than me!
    Last edited: 9 Jan 2017
  3. lpretro1

    lpretro1 Guest

    It's difficult to just measure the pad material. Rule of thumb we use is 3mm including the backplate - easier to measure with calipers
  4. meta lon

    meta lon Guru

    Dont forget to clean the caliper pistons thoroughly before you push the pistons back into the caliper when you fit the new pads.

    1mm here too or as a idiot guide ,the pad springs are touching the disc =worn out pad material
    Last edited: 11 Jan 2017