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  1. #1
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    Karate Monkey with 120 mm fork = Allmountain Hardtail?

    29" allmountain hardtails/trailbikes are very popular here in germany this time.

    So I compared the geometry of a few allmountain 29" Hardtails and took the calculator…

    Karate Monkeys geometry is suspension corrected for 80 mm forks.
    So what happens to the geo, if I take a 120 mm fork?

    Front is coming 40 mm higher -> good for descents

    Steering angle goes down from 72 deg to 70 deg -> more stable going downhill. OK, not the angle of a real AM/Trailbike (about 68-69 deg) but you should feel the difference.

    Seat angle goes down from 73 deg to 72 deg -> not so good for uphill, but if you use a setback seattube, you can compensate this with a non-setback one

    BB drop goes down from 68 mm to 59 mm -> some AM hardtails (e.g. Kona Honzo) have such values and so it should be OK.


    Has anyone tried a Karate Monkey with a 120mm fork and can write about it?

  2. #2
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    Reputation: LyNx's Avatar
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    Nope, no one.

    I think you mis-calculated the height of the BB, AFAIR it went up a lot more than 11mm, but I liked the tall BB, less pedal strikes. I liked it, but since the frame wasn't designed for it by 40mm I decided to not ride it like that for safety reasons, although it most likely wouldn't do it anything.

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  3. #3
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    Interesting. Come spring, I'm planning to split the difference and put a 100mm Reba on my KM. I figured that the slight slackening/BB raising might do the Karate Monkey some favors.

  4. #4
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    I have a 100mm travel reba on mine. Works great. With a little sag, it comes out just right.

  5. #5
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    Quote Originally Posted by Jstews View Post
    Come spring, I'm planning to split the difference and put a 100mm Reba on my KM. I figured that the slight slackening/BB raising might do the Karate Monkey some favors.
    Mine resembles those remarks.

    P1010002

    And for the OP - I'm typing this post on my way back from Germany to the US (was in Schorndorf near Stuttgart the past 8 days).

  6. #6
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    100 seems to be perfect for my KM. It is not quite as spirited on the climbs, but screams on the way down.
    "Don't take life too serious. You'll never get out alive."

  7. #7
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    I actually think a travel adjust 90-120mm fork might be the ticket if you're really wanting to use the KM as such, not sure though still if I'd trust the HT.
    One day your life will flash before your eyes, will it be worth watching??
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  8. #8
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    i have a buddy with a KM on a 120... i will see if i can get some pics. he loves the ride, i have pedaled it a bit and it feels a bit strange to me

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