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Grinding sound of the rotor...
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
Hello everybody, hope you all are doing good.
I have a bit of problem about tune-in the rear Avid Elixir 5 hydraulic w/6” rotors, its a bit irritating and also I've notice some little change in my braking. I'm trying to tune it so to remove the grinding sound, but every time I tighten the lock and try to spin it again I can here the grinding sound again.
So I'm thinking if there is a problem with the rotor? or the pads.
I there anybody here experience that before and if so can you share it with me it will definitely help me
Thanks
-broly_anthemex2
[Mod. moved to MTB gear]
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Grinding suggests contaminated pads - dirt or grit. Rubbing is a contact issue with pad and rotor. For the former, remove the pads use a coarse sandpaper and sand them down slightly, then use rubbing alcohol or nail varnish remover with a lint free cloth over them. Also worth running the cloth over the rotors.
If it's rubbing, check rotors are straight firstly and that your wheel is aligned correctly.If OK, then undo bolts that mount the caliper to the adapter about 2 turns, pull the brake lever to center and tighten while holding the lever. 9 times out of 10 the above steps are enough is there are no alignment issues. Sometimes you have have to manually center the brake using eyesight between pad and disk.
If none of that works, time for a trip to local bike shop I'd say.
IS it grinding of pads or metallic?
I'd first check that caliper is mounted straight - ie. Is the rotor in the middle of the caliper at both ends? If your caliper is out of square then loosen, twist, tighten.
Do you have a spacer from the mounting bolt protruding and touching the rotor?
When you spin the wheel, is the rotor running true?
If you decide caliper is mounted correctly and no part is touching the rotor then check pads.
Are the pads retracting back into the caliper after you squeeze the brake? If not, get a clean rag, place it over the end of a screwdriver and very gently push pads back against pistons. Try brakes again. If pads don't retract properly it's best to get your local bike shop to have a look as it could be a number of problems such as gunk in your pistons/hydraulics etc.
Dose it sound like a turkey gobble because i've also got elixir 5's and its a very common problem with them. The noise is from my rear brake but i still find i've got full power, its just really annoying.
If you want just google "elixir 5 turkey gobble" and plenty of stuff comes up.
Btw how old are your brakes?
Jono.
Thanks for the wonderful reply I've just read it I will try to do those things that you recommend. I think is the pads that has a problem cause the rotor is really straightly aligned. and now I'm beginning to hate elixir five cause it's so annoying specially when you brake... well thanks again mate.. =)