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  1. #1
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    Mar 2007
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    Lighter replacements for my CenterLock XT SM-RT77 rotors

    Hi All,

    I'm building a new set of wheels for my MTB, for road-use only. I was thinking in saving some weight on brake rotors. I currently have the XT discs (SM-RT77), CenterLock, listed at 156g.
    I considered XTR first, but it won't make such a tremendous difference.
    So my question is: do you know any light, preferably cheap (and no, it doesn't have to be strong ) CenterLock rotor, in 160mm size?

    Also, some loss in braking won't bother me, as this set of wheels will stay on road.

    (The 6-bolt rotors seem to be out of the question, because they rapidly approach the weight of my current XTs as I consider the adaptors and the bolts - however, I'm open to any idea).

  2. #2
    ups and downs
    Reputation: rockyuphill's Avatar
    Join Date
    Nov 2004
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    13,657
    Marta SL 160mm disc and DT Swiss centerlock adapter weighed 120gms, same as the new XTR 160mm centerlock.

  3. #3
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    Never got the chance of weighing them, but Shimano lists XTR SM-RT97 160mm centerlock as 135g.
    I was thinking more like 100g per disc . Something like this (ARO-03 160mm rotor 92g) but centerlock: http://www.bikeonline.it/catalog/pro...oducts_id=1550

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