Mountain Biking - Suspension fork question

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Pockymonster
06-02-08, 09:43 PM
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?

elf 232
06-02-08, 10:16 PM
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...
xcracer13
06-02-08, 10:26 PM
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.

ProFail
06-02-08, 10:50 PM
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.
Pockymonster
06-02-08, 11:01 PM
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?