GT Peace 9r - can I use a 100mm fork?- Mtbr.com
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  1. #1
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    GT Peace 9r - can I use a 100mm fork?

    I just got a 2010 GT Peace 9r and I want to upgrade a few things. Among the upgrades I am looking at getting a suspension fork and in particular the Tora SL 100mm. I know the frame is corrected for 80mm. Is 100mm going to work?

    Thanks,

    Robin

  2. #2
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    Why?

    It will slow the steering down. Adding a 20mm longer fork is like making the head angle a bit over a degree more (I read that somewhere) hence making the steering slower. It will also raise the handle bar height. So if you like riding a "chopper" style bike ie goes good in a straight line and you like the "sit up and beg" riding position go for it.

    I notice Niner bikes are starting to use shorter forks. Maybe a lesson to be learnt there?

  3. #3
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    It'll work fine, but as mentioned it'll steer slow. This will make it more stable through rough stuff, but will make tight turns harder. It's just a matter of what you want to use the bike for. I ride a Banshee Scirocco with a 160mm fork (Fox Float 36 RC2). It steers like a truck but I love being able to plough into things with an abject lack of finesse and have the bike just figure it out.

    It'll also put more strain on the headtube. Being a steel frame, this should be fine so long as GTs welds are up to scratch.

  4. #4
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    I would go for it. On the trails that I like to ride and the way that I like to ride them, a slightly slacker head angle makes things more fun. You may notice the front wheel wondering on climbs a little bit more than the stock fork, but totally worth it on the way back down.

    EDIT: I also want to mention that 20mm is not a very big difference when it comes down to it. U-Turn/Talas/ATA... all of the travel adjustable forks have way more than a 20 mm range.
    Last edited by DanD; 03-27-2010 at 08:08 PM.

  5. #5
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    Thanks for the suggestions! I talked to the guys at my local LBS (bought the bike online) and they had similar suggestions. They said that the 100mm will make climbing a little more squirly, but it will actually improve the handling on the way down.

  6. #6
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    Head angle is 72* on the M and the L. Changing it to 71* with a fork change won't be that big of a deal. The Peace is a quick steering bike to begin with.

  7. #7
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    I have a small frame...

    Loving it so far...handles great. Ordered new brakes, saddle, seat post, headset, fork...today. I have a nice stem to stretch me out a bit. A little bit of bling to make her sweet.

    So much fun!

    Thanks! I will post pics once she is complete.

  8. #8
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    I replaced my seat, handlebar, stem, and tires so far. I also switch between 18 and 20 out back when needed.

    The seat, I replaced with an ISM Adamo because I needed a short nosed saddle.

    The bars were swapped for a Gnar bar. Truely a sweet handlebar.

    The stem was swapped because I wanted something shorter.

    I recently put on a set of Bonty FR3's for tires. These things are massive-ly awesome.


    I have a set of Blunts being built up, and will hopefully have a new rigid fork for it soon (have a new headset waiting for the fork.)


    The Peace is a great platform, and is plenty fun. It is a bit heavy, but it is quite stable while hauling as s.

  9. #9
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    Quote Originally Posted by robbybird
    I just got a 2010 GT Peace 9r and I want to upgrade a few things. Among the upgrades I am looking at getting a suspension fork and in particular the Tora SL 100mm. I know the frame is corrected for 80mm. Is 100mm going to work?

    Thanks,

    Robin
    Nice. Was that the Peace that you had borrowed when I saw you last?

    You should bring it up here to Annadel!


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