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  1. #1
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    disc brake bolt pattern

    hey guys im from Chesapeake, va and we have no mountains here and well i just love my bike
    ive got a 2011 Haro Flightline Trial
    2011 Haro Flightline Trail | Mountain Bike Components and Reviews

    ive built a Trike in the mean time and need a little bit of help with Disc brakes

    this thing has 160mm rotor on it and i want to upgrade to a 203mm but compared to the two disc and the Haro, measuring from one hole to the opposite hole is 44mm and my trike disc is 48mm.....


    can anyone shine some light on this and help me find a 203mm that has a 48mm bolt pattern(i guess)?

    thanks Brian

  2. #2
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    maybe im asking the wrong question.....
    im finding universal bolt patterns and ISO (international Standard) bolt patterns but no measurements for either

  3. #3
    Fat-tired Roadie
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    Interesting. I haven't heard of there being multiple six-bolt patterns.

    I'd speculate that the trike has something non-standard.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

  4. #4
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    Is the trike rated for a 203mm rotor? Not all forks are.

  5. #5
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    i built this trike from BMX parts and a variety of parts, the rotor is designed for a motorized bike (26") its called a THREAD ON DISC BRAKE CONVERSION KIT
    on this site Custom Motored Bicycles - DISC BRAKES,BAND BRAKES, DRUM HUB BRAKES,DUAL BRAKE LEVER,BRAKE PARTS
    scroll down a little bit and you will see it.

    i used this disc and hub adapter but its not enough brake power to stop my trike on a downhill at about 45mph so i want to get a 203mm rotor which is what alot of other guys are using except i got some off the wall rotor i guess cause i cant find a 203mm rotor with a 48mm bolt pattern

  6. #6
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    btw i think its a little strange that a fork can buckle under the pressure of 203mm rotor, but im just new to this and BMX was my life and this disc stuff is all new to me so im ready to hear anyones suggestions and recommendations, thanks

  7. #7
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    This entire set up looks sketchy as hell. Plastic wheel + 45mph + single front disc brake + thread on disc adapter = not ending well.

    And yes, it appears to be a non-standard rotor.

  8. #8
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    Quote Originally Posted by Berkley View Post
    This entire set up looks sketchy as hell. Plastic wheel + 45mph + single front disc brake + thread on disc adapter = not ending well.

    And yes, it appears to be a non-standard rotor.
    yes indeed it is sketchy as hell but until you try a drift trike you wont know the rush it can give
    Trike Drifting - YouTube

  9. #9
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    Quote Originally Posted by Berkley View Post
    This entire set up looks sketchy as hell. Plastic wheel + 45mph + single front disc brake + thread on disc adapter = not ending well.
    Yep. I would get a disc brake fork and ditch the fork and disc brake adapter ASAP. Then you face death only from the inherent nature of what you're doing, rather than the threat of your fork folding.

  10. #10
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    Quote Originally Posted by ColinL View Post
    Yep. I would get a disc brake fork and ditch the fork and disc brake adapter ASAP. Then you face death only from the inherent nature of what you're doing, rather than the threat of your fork folding.
    noted, now to find a 20inch disc brake fork

  11. #11
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  12. #12
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    Guys, that looks like a lot of fun but please, wear a helmet!

  13. #13
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    i always do and discourage anyone from not

  14. #14
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    Quote Originally Posted by driftninja View Post
    maybe im asking the wrong question.....
    im finding universal bolt patterns and ISO (international Standard) bolt patterns but no measurements for either
    IS is a 44mm BCD.
    mtbtires.com
    The trouble with common sense is it is no longer common

  15. #15
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    Looks like fun, we lack paved hills around here, its mostly too flat to gain any speed. But I know what I could do with some of the bike frames I've been saving though.

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