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Thread: New rotors?

  1. #1
    CEB
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    New rotors?

    I can't imagine "wearing out" a rotor. I have been on the same ones for 3 years now (XTR) and do change pads ( DOH), but haven't even given a thought to renewing rotors. Other than bending one, is there a reason to replace rotors??

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  2. #2
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    I just wore one out, cause of I think of a loose Rder hanger bolt, that allowed the alignment to get out of wack. took about a month to happen.

    The rotor was on about 8000 km, with three refacings.

    I wonder if Shimano hard surfaced their rotors (flame hardening or something), no one confirmed or denied. So if you finally wear through the surface hardening then the wear just skyrockets.

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    CEB
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    Quote Originally Posted by jeffscott
    ................The rotor was on about 8000 km, with three refacings.
    .............

    What do you mean refacing? Who does that?

    CEB

  4. #4
    Meh.
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    You can't turn rotors on bikes like you do with cars... Do you mean just sanding it? I consider that more cleaning...

    Just like with cars, the rotors can eventually wear out. Tell-tale sign is when grooves are worn in.

  5. #5
    29 some of the time...
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    Lucky

    I usually end up having to replace rotors every 6-12 months due to unforseen logs, crashes, or warping. I have also replaced rotors due to noise that wasn't easily cleared up with standard practices.

    3 years is fantastic. So long as you are using stock pads and are having good performance I say just go with it . Rotors do eventually wear to the point that they fail, but it does take quite a bit of wear. Just keep an eye on metal wear. When the wear path gets worn down to below about 70% of full thickness you should probably look into replacements

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    Well most people around here say use some sand paper in a figure eight motion to level and smooth out a worn or rough rotor.

    This was a used rotor from the LBS that they had sanded, I then used a bastard file to smooth it three times, I do this usually when I change pads.

  7. #7
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    Sure- rotors can wear out

    I have worn out a rotor- by worn out I mean that the rotor was getting too thin in an area. In my case it was an original pattern Hayes rotor that was six years old- it started out at about 2mm thick and had worn to about 1.5mm thick where the arms of the rotor meet the main braking surface. Decided to replace it since I have seen rotors come apart from being worn too much.
    I bike; therefore, I work

  8. #8
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    All rotors wear out. 1.5mm thick on the braking track is a good guideline for knowing when to say when and buy a new one as it's in the ball park of what the major players say.

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    CEB
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    Got Em!!!

    '07 XTR rotors......
    Attached Images Attached Images

  10. #10
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    Quote Originally Posted by XSL_WiLL
    Just like with cars
    What are these "cars" you speak of?
    Singlespeed since September 24, 2006.

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