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Does it matter which rotors?

russ_gillespieruss_gillespie Posts: 165
edited July 2010 in MTB workshop & tech

I've bent my front formula rx rotor and the bike shop have true'd it as well as they can but say I may need to replace it. I haven't actually collected the bike and looked at it myself yet so this could all be pointless, but...

...If I was to replace it, do I have to get another (rather expensive) formula rx rotor? Or can I get a superstar flame, for example. I understand that different rotors will affect performance and pad life, but is there any other reason to stick with the same manufacturer, or even the same design?



  • The RookieThe Rookie Posts: 27,802
    As long as the diameter is the same and the mounting to the wheel the same, it matters little what disc (I'm English, rotor is English (US) - to plagiarise form Microsoft) you use, some are better material, some will be lighter, you'll get more or less mud clearance 'holing' but they will all work just fine.

    Current steed - Whyte T129, 2013 frame, mongrel Revelations, Giant dropper, Stans S1 wheelset. 12, Magura Trail Sport brakes, 1x11. 12.8Kg
  • S_J_PS_J_P Posts: 908
    Some disc brakes have wider pads than others, so as well as diameter and thickness also consider width when buying new.
  • It should be fine.
  • Mark ElvinMark Elvin Posts: 997
    Of course it matters, you NEED Alligator Aries discs.....
    2012 Cannondale Synapse
  • joshtpjoshtp Posts: 3,966
    no reall dif... the superstars are great value.
    I like bikes and stuff
  • cavegiantcavegiant Posts: 1,546
    Formula pads are quite narrow, so you can get away with less braking track and less weight.

    A disk you might be interested in is the new shimano XT floating rotor (got mine at CRC).

    Far higher build quality that the other floating rotors, light and cheaper (than other floaters).

    I use them with my Formula the One and am impressed.
    Why would I care about 150g of bike weight, I just ate 400g of cookies while reading this?
  • thanks chaps very helpful.

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