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  1. #1
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    160 to 200 mm rotors

    hi guys,
    should i upgrade from 160 to 200mm rotors?
    want more braking power but heard that the 200mm rotors are noisy and tend to bend,is it true?
    tnx

  2. #2
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    I don't know about "tend to bend" but certainly it's easier to bend a 200 due to the additional leverage. The thickness of the rotors doesn't change as the size goes up. Have you thought about a 180mm? What kind of riding do you do? How much do you weigh? How long are your down hills?

  3. #3
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    im a beginer that likes to trail and jump,own the 2013 norco fluid9.2,im whey 170pounds,
    i need a stronger bite from the front rotor but want it to be as quiet as stock.

  4. #4
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    160 to 200 mm rotors

    Quote Originally Posted by avi1777 View Post
    im a beginer that likes to trail and jump,own the 2013 norco fluid9.2,im whey 170pounds,
    i need a stronger bite from the front rotor but want it to be as quiet as stock.
    What brakes are they?

  5. #5
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    160mm

  6. #6
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    160 to 200 mm rotors

    Quote Originally Posted by avi1777 View Post
    160mm
    No, what brand and model are your brakes? Not your rotors.

  7. #7
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    Front Brake Avid Elixer 3 hydraulic disc brake
    Rear Brake Avid Elixer 3 hydraulic disc brake
    Brake Levers Avid Elixer 3
    Brake Cable Casing Avid 160 mm rotor front and rear

  8. #8
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    160 to 200 mm rotors

    180mm at the front should give you a big enough improvement, but I'd also get a shop to check that your brakes are bled properly, and that the pads are good. You did bed your pads in correctly per the instruction manual when you got them, right?

  9. #9
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    ok tnx,
    all was done correctly at shop.

  10. #10
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    Yeah, no way you should need more than a 180 up front if you've got everything else right. I'm 210 without my gear, and I run a 180 up front and a 160 in the rear. Make certain you're doing 60-70% of your braking up front, as that's where your traction will be due to weight shifting forward when you brake.

  11. #11
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    One thing to check is to make sure that your fork is capable of handling the larger brake rotor. Some forks have a rotor size limit recommendation.


    That being said, I'm 185 lbs and run a 180 front and 160 rear rotor. Plenty of braking power.

  12. #12
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    great tnx guys,
    i might upgrade from the fluid9 to the shinobi but dont want to get heavier bike,
    need to find out what the weight difference.

  13. #13
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    You might want to try checking out other disc brakes that are within the same MM but an upgrade to the existing set that you have.

    i.e. Avid Elixir 5

    Cos if you would to upgrade to a 180MM, you will need an 180MM adapter - which is about another $20-30

  14. #14
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    got the shimano xt with a 203 mm front rotor.

  15. #15
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    160 to 200 mm rotors

    Quote Originally Posted by skewe View Post
    You might want to try checking out other disc brakes that are within the same MM but an upgrade to the existing set that you have.

    i.e. Avid Elixir 5

    Cos if you would to upgrade to a 180MM, you will need an 180MM adapter - which is about another $20-30
    Hem... An upgrade would be more of a Shimano SLX or XT brakeset rather than the Avid, and adaptors can be had for less than $15 usually too.
    Quote Originally Posted by NicoleB28 View Post
    topless. that's what all mtb girls do. we go ride, get topless, have pillow fights in the woods, scissor, then ride home!

  16. #16
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    IF I am not mistaken, 203MM is no longer the standard and the industry is trying to standardize the MM size...
    I think I read it somewhere but I am not 100% sure

  17. #17
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    why?whats wrong with the 203mm?

  18. #18
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    Nothing is functionally wrong with 203mm. The size is based on an imperial measurement of 8 inches, the bike industry is moving to a common metric standard of 200mm even.

    Here's an example of a 203mm advantage. I have a fork with clearance for a 200mm rotor, but the necessary 60mm adaptor won't fit because of its straight shape, an adaptor for 203mm fits fine. I have the same bracket shape compatibility issue with the rigid rear stays also.

    Noise has more to do with pad compound than rotor size.

    Power (work per lever effort) can improve with a larger rotor. Sometimes, but not always, modulation can suffer somewhat on poor traction surfaces with a large rotor. Once again this is another characteristic than be improved upon with pad compound selection. I recommend installing the largest diameter, beefiest, rotor that will fit, and Swiss Stop Green pads (Disc26).

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