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fork sizes question..

Old 05-01-07, 08:17 PM
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derekdehaas
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fork sizes question..

i have been meaning to ask here but never ask sooner but here goes. i want to get a new fork and upgrade it someday but my fork is 80mm and i been searching for that size and only find a few. would it be okay to have 100mm on my bike? i never understood the fork travel and mm thing in bikes. so now it time for me to learn and help would be great. thanks.
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Old 05-01-07, 08:31 PM
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markjenn
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I'm not authority, but I've got an 80mm and have been doing a lot of reading on what fork to replace it with. As I understand it, you can use a longer travel fork, but it may upset the balance and attitude of the bike since it will be riding higher in the front. Many forks have both external and internal travel adjustments so that's another option.

The shorter travel forks are commonly called cross-country or XC forks so you probably want to be looking in this category. Most XC forks are 80mm to 120mm.

80 to 100mm probably will work, and might even work better, but if you start putting a downhill 160mm fork on there, obviously the bike's handling will be affected.

- Mark
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Old 05-01-07, 08:39 PM
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derekdehaas
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yeah that what i'm afraid of...the bigger the bad you will get with a longer forks. i hardly see any 80mm forks. i just want a better fork thats all right now i have a manitou axel i think it a low level crap i am not sure.
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Old 05-02-07, 07:04 AM
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Originally Posted by derekdehaas
yeah that what i'm afraid of...the bigger the bad you will get with a longer forks. i hardly see any 80mm forks. i just want a better fork thats all right now i have a manitou axel i think it a low level crap i am not sure.
I replaced a 80mm fork with a 100mm fork, and love the slight change in geometry. If you want a slightly more slack headtube angle for descending (I did), this swap is for you. As a bonus, you'll get close to an inch more travel. You're slow speed handling may slow a bit, but I can hardly tell, and the better downhill exerience is more than worth this slight trade off. Good luck!

... Brad
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Old 05-02-07, 07:35 AM
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Stacey
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I replaced a 40mm (with 10mm of sag) fork with an 80mm (with 15mm of sag) for a net effective increase in fork length of about 35mm or 1 1/2". It gave me a noticable slacker and higher head tube. Slowed down the steering a bit and the bars feel like they want to tip in a bit when turning, neither is a problem. The upside is it dosen't feel like the front wants to plow or wash out in the turns any more. It just stays planted.
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Old 05-02-07, 08:50 AM
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thanks for the info guys. i will keep in mind.
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