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  1. #1
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    Brake rotor size rear

    I know that up front the fork usually is limited to a certain size rotor, for me 160mm, but is there usually an issue running a bigger rotor in the rear? I have a 2006 Giant Trance 4 if that makes a difference and I'd like to run 180mm or 200mm rotors.

  2. #2
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    Whatever you do, don't run a larger rotor in back than in front or you will lock the rear wheel all too often.
    ...and proud member of the anti-sock puppet desolation

  3. #3
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    Yeah, I'm wondering why it is that you want a larger rotor in the back?

    And you should be able to run a larger rotor in the front, you just need an appropriate adapter. This is where you need the larger rotor, if one is needed at all.

    Can we ask how much you weigh, and what kind of riding you're doing?
    Stay aware of those who hide in plain sight.

  4. #4
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    I weigh 180 and do all mountain riding/ more technical trail riding. I live in colorado so I have a wide variety of stuff to ride. I figured that might be the case with wanting a bigger rotor in the front, I use my front brakes more than my rear. The problem is I bought the bike used and it came with crappy disc brakes, I replaced the front when I got a new fork that was post mount. Matching rotor sizes would be ideal then I'm guessing?

  5. #5
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    Quote Originally Posted by lagocza View Post
    I weigh 180 and do all mountain riding/ more technical trail riding. I live in colorado so I have a wide variety of stuff to ride. I figured that might be the case with wanting a bigger rotor in the front, I use my front brakes more than my rear. The problem is I bought the bike used and it came with crappy disc brakes, I replaced the front when I got a new fork that was post mount. Matching rotor sizes would be ideal then I'm guessing?
    You would do fine with 180 up front/160 in the rear or 180/180, for your weight. If you do long, steep descents, then 180/180 makes more sense.
    ...and proud member of the anti-sock puppet desolation

  6. #6
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    So with my avid bb5 brakes I could use the 180mm adapter it comes with and put a bigger rotor up front?

  7. #7
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    Not positive because many adapters are front or rear specific. Does it sat "F" or "R" or front or rear on the adapter itself?
    ...and proud member of the anti-sock puppet desolation

  8. #8
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    I'd have to check, but if I dont have the correct one finding one probably wouldn't be too tough.

  9. #9
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    Quote Originally Posted by lagocza View Post
    I'd have to check, but if I dont have the correct one finding one probably wouldn't be too tough.
    Yes, easy to locate.
    ...and proud member of the anti-sock puppet desolation

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