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  1. #1
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    Suspension fork question

    I have a 2008 Trek 3700 that has a suntour fork that has 60mm of travel. I was wondering that if say I replaced the fork with one that has 100mm of travel will the front of my bike get hiked up and be higher? I don't quite understand how it would all work as I'm sort of a noob. Would somebody enlighten me?

  2. #2
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    It could definetly "goof" with the geometry giving you a minor loss in comfort and good pedaling posture but since its hard to find good 60mm replacement forks i would go with an 80mm to be safe.

    I speak from experience, i put a 145mm fork on a previously 100mm frame... bad idea...
    elf 232 contra mundum.

  3. #3
    Nitro xcracer13's Avatar
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    Quote Originally Posted by elf 232 View Post
    It could definetly "goof" with the geometry giving you a minor loss in comfort and good pedaling posture but since its hard to find good 60mm replacement forks i would go with an 80mm to be safe.

    I speak from experience, i put a 145mm fork on a previously 100mm frame... bad idea...
    It wouldn't mes it up too bad. The front end will just come up a little bit easier on steep climbs. With proper sag it will be between 85mm and 80mm. Don't listen to elf.
    www.teamnrc.com
    When you feel good, racing is hard. When you're not good, its worse.. - Sager

  4. #4
    Generic Title ProFail's Avatar
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    Quote Originally Posted by xcracer13 View Post
    It wouldn't mes it up too bad. The front end will just come up a little bit easier on steep climbs. With proper sag it will be between 85mm and 80mm. Don't listen to elf.
    I don't know.... 60mm to 100mm is a 66.6% increase. Seems like it would be a noticable change. I'd going to agree with Elf, go with 80mm to be safe.


    But who am I to judge? I'm usually wrong anyway.
    Generic Joke

  5. #5
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    I am actually not going to change it anytime soon. I was just curious and also I know eventually this fork is going to break. The Trek 3900 uses a 80mm fork. I think the bike has an identical frame to mine so I wonder how they used a 80mm fork and kept everything from being a weird height. I guess I'll have to look at them side by side at the store. Is it possible that they used a 80mm fork and somehow it didn't affect the height infront? Whats a 80mm fork thats a reasonable price? My bike costs 369.99 Canadian so I'm really not looking to spend more a lot, especially not on something that costs more than the bike. Any suggestions?

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