Bigger front rotor

bazil27
bazil27 Posts: 7
edited September 2009 in MTB workshop & tech
I have a set of avid juicy 3 if I increase the front rotor to 185mm from 160mm will this improve stopping power and will it invalidate the warranty of my forks (Dart 2) as sram say 160 is max

Comments

  • bomberesque
    bomberesque Posts: 1,701
    yes it will improve the stopping power
    yes it will invalidate the warranty, if that's what SRAM says

    what answers were you expecting?
    Everything in moderation ... except beer
    Beer in moderation ... is a waste of beer

    If riding an XC race bike is like touching the trail,
    then riding a rigid singlespeed is like licking it
    ... or being punched by it, depending on the day
  • RealMan
    RealMan Posts: 2,166
    If SRAM say 160 is the max, doesn't that mean 185 wouldn't fit?

    But yes, it would improve your stopping power.
  • bomberesque
    bomberesque Posts: 1,701
    could simply mean that they don't recommend the extra stresses, but yeah, could mean there's not the clearance also I guess
    Everything in moderation ... except beer
    Beer in moderation ... is a waste of beer

    If riding an XC race bike is like touching the trail,
    then riding a rigid singlespeed is like licking it
    ... or being punched by it, depending on the day
  • bazil27
    bazil27 Posts: 7
    The reason I ask thought maybe someone had done it and sram work on the side of caution by recommending only 160mm
  • J55TTC
    J55TTC Posts: 224
    So, fit a bigger rotor and keep the 160 rotor should there be any warantee issues :wink:
  • The Northern Monkey
    The Northern Monkey Posts: 19,136
    the reason the don't reccoment bigger rotors is because of the extra forces put on the fork leg... the dart isn't as stong as other forks, so could be liable to breaking under heavy braking!
    Santa Cruz Butcher
  • bazil27
    bazil27 Posts: 7
    Must be a bit slow today didn't think of keeping rotor and denying all knowledge in event of problem- Nice one :lol:
  • mea00csf
    mea00csf Posts: 558
    you might want to make your mates aware then should it break with little warning and you're unconscious, it's not just the bike that could break......
    http://www.bicycletourist.weebly.com
  • 26 to Life
    26 to Life Posts: 194
    And so, the cycle (industry) continues. I hope SRAM read this board ;)
  • J55TTC
    J55TTC Posts: 224
    There wont be a significant difference IMO.

    If you slam on front brakes with both the 160mm rotor as well as the 180mm rotor you are going to fully compress the forks and go over the handlebars as a result of stopping instantly. Warrantee aside the stress on the forks is going to be fractionally different, if not the same.

    Where you will notice the difference the most with the bigger rotors is in control, you will have to squeeze the lever slightly more with the smaller rotor to acheive the same effect as it will be travelling slower and therefore carrying more torque. Thats physics.

    The most significant difference will be cosmetically as the bigger rotor will look better.

    As soon as the front rotor on mine is due to be replaced, it will be replaced with a bigger one.

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