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  1. #1
    Senior Member mr,grumpy's Avatar
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    MTB Fork swap question

    I want to to replace the OEM 63mm suspension fork on my Trek 820 with a rigid fork but the two cheep ones are rated to be correct for 85mm. Nashbar sells a carbon fiber fork for a hundred fifty bucks that is for" forks with less than 80mm of travel." but for less than the cost I can get a Rock Shox Dart 2. The carbon fork o rht e Dart would cost TWICE what I paid for the bike, so I'm hoping some one will say that i can replace with the 85mm correct fork.
    "I'm built like a marine mammal. I love the cold! "-Cosmoline
    "MTBing is cheap compared to any motorsport I've done. It's very expensive compared to jogging."-ColinL
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  2. #2
    coprolite fietsbob's Avatar
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    You measuring travel distance .. ? .. fork crown race to axle is another way to measure replacement forks

    OEM get pallets of Boxes of parts , buying parts aftermarket , retail, in the US will cost more.

    unless you travel to Taipei or Hong Kong, and buy stuff there.

    closer to where it all is made.. .

  3. #3
    Senior Member mr,grumpy's Avatar
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    All info from the words on the websites. No actual measurements were made on anything. Measure fully extended? As it sits? Rider on board?
    "I'm built like a marine mammal. I love the cold! "-Cosmoline
    "MTBing is cheap compared to any motorsport I've done. It's very expensive compared to jogging."-ColinL
    Rides:
    1999-ish Diamondback Sorrento (I'm not Dead Yet! I feal happy. I think I'll go for a walk!)
    1980ish Raleigh Marathon (Vintage Steel)
    2007 Gary Fisher Advance (giving the Sorrento a break)
    2006 Trek 820 (Captain Amazing)
    2010 Specialized Tricross (Back in Black)


    My little bike blog.

  4. #4
    Map maker cbchess's Avatar
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    just look to measure your Axle to crown measurement on your existing fork and look for something close - a little bit taller will be OK. If you go way too tall you will slacken your existing head angle and your steering will feel a bit sloppy. I personally like a slacker head angle - my first MTB had a 72* head angle (quick steering). Now My bike has 69* head angle (more relaxed steering)

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