Brake pad wear – one side only

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  • Brake pad wear – one side only
  • You need to pull the other lever harder to balance it out

    Premier Icon Drac
    Subscriber

    Badly aligned.

    Sticky piston.

    excitable1
    Member

    First check your disc hasn’t got a bend in it. If it has use an adjustable spanner to grip the disc and bend it back. It will take a few goes and you’ll not get it micro perfect but it will be enough so don’t over do it.

    Pull the pads out and soak a cloth in white spirit and drag it through to clean up the pistons of brake pad dust. This often gathers round the edges of the piston and causes them to stick.

    While the pads are out, GENTLY & SLOWLY pump the brake lever so that you can see which piston is sticking. Then use a knife or thick alum key to push and hold the good piston back into its housing. Whilst holding the good piston in with the alum key,GENTLY & SLOWLY pump the lever again so the sticking piston comes out of the housing a bit. When you have revealed SOME of the outside edge of the sticking piston use a silicon lube and an ear bud to lube up the edge of the piston. Push both pistons back in fully to their housing and then keep repeat the process for the good piston holding in the sticking piston. Keep doing this for both side until you start to see equal movement in them both when you pump the lever (SLOWLY). Remember to push the pistons all the way back in before you put the wheel back on but you may need to bring them out a couple of millimeters so they don’t stick in their housing off the first ride.

    DO NOT OVER PUMP THE BRAKE LEVER WHEN YOU HAVEN’T GOT THE WHEEL IN, OTHERWISE THE PISTONS WILL FALL OUT AND YOU’LL GET AIR IN THE SYSTEM AND YOU’LL NEED TO BLEED THE BRAKES.

    Apologies if this is all grandma egg sucking… all works for me and my F1’s.

    hallz
    Member

    Bit of advice required if anyone can help?!

    My bike has Formula R1 disk brakes and the rear pads are wearing out quite quickly. I am finding though that one pad is substantially worse than the other. When i say substantially – i mean its been obliterated whilst the other side looks fine!

    Why would that be?

    Cheers

    hallz
    Member

    Thanks for the advice – particularly to you exciteable1. No danger of overstating the obvious with me!!!

    excitable1
    Member

    Hallz, no problem…. I learnt the hard way. I was very red faced when I sheepishly had to go back into my LBS with the bike in one hand, the pistons in the other and a trail of break fluid behind me 😳 !!!

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