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Brakes - Rotors
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
Hey all, looking for some advice.
I think its time to replace the rotors, (worn and warped), I would like to know what tool to use to unlock the DT Swiss lock ring on the rear wheel. Ive tried my cassette lock tool but its slightly too big. The ring has 12 teeth.
Secondly, can I replace the rotors with any rotor (as long as its the same size) and therein lies an additional question whats a good inexpensive rotor for XC use?
Note, currently have Avid 160mm G3CS's onboard.
Thanks
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Shimano cassette lockring tool should do it. I thought Centrelock followed the Shimano standard - it does on the XT hub on my commuting wheels.
It did take a little jiggling to get it in past the shimming washer behind the face of the axle that bites into the dropouts the first time... one of those rubber mallet moments
Yeah i thought it was a bit odd too, the tool is definitely like 1mm larger. Plus the teeth on the tool are flatter (but line up). The notches in the ring are significantly deeper, maybe I'll try a different brand cassette tool.
And yeah I did consider taking to it with a hammer/mallet, but generally when I do that............bad things happen!!
On my other questions, do you have any thoughts/points?
The centrelock definitely uses the same tool as a standard cassette lockring. I have a vague memory that there's another tool that's the same but 1-2mm bigger, maybe the tool for removing the internal bottom brackets?
re: substituting rotors, just make sure the diameter is exactly the same, and the rotor brake track is as wide or wider than the pads.
Why? If your pads are wider than the brake track and overhang onto the rotor spokes, the bit of pad that doesn't engage with the brake track doesn't wear as much and leaves a protruding lip, which will undercut and eventually wear through the rotor spokes! I nearly had this happen with some Hayes Nines, and that was with the standard Hayes rotors. Wasn't impressed with that design "feature" and have not used Hayes since. Had to replace the rotors to sell the bike - I couldn't in all conscience let it go to a newb like that.
I use Avid G2 Cleansweep rotors on one wheelset with my 2010 Shimano XT brakes, as the track is wider than the pads, but suspect I couldn't use my (2006) Shimano XT rotors with my son's Avid brakes on his bike, as the track would be narrower than the pads.
So, something to watch for.
Also you have to watch the Shimano rotors alloy carrier which can foul the bottom of Avid Elixir calipers if you mix these two together. May be the same for other brands too.
Some rotors are resin only, i.e the material of brake pads , resin or metal pads.
If so rotors will have "Resin Only" written on them & metal pads will ruin them.