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  1. #1
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    anyone running a 100mm fork on a karate monkey?

    Anyone do this? I know the frame is corrected (or whatever the verbage is) for 80mm, but can you run 100mm on it?

  2. #2
    Never enough time to ride
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    I've got a 100mm Reba on mine and it's just fine. Been there for about a year, slowed the handling just a bit, but it still carves and handles really well. Still climbs nice too.

    happy trails...

    squish
    Get out and ride!

  3. #3
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    I'm running a 100mm manitou tower pro on mine and haven't noticed any handling or performance issues. Go for it!

  4. #4
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    same boat

    I am seriously considering the same thing too,
    I feel I just couldn't take a beating anymore from my rigid fork too :-(
    When trails gets tougher, Just stand up and deliver.

  5. #5
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    I have a 100mm on mine and it doesn't seem to cause any problems that I've noticed.

  6. #6
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    does it void the warranty on the frame if you run a 100mm instead of an 80? I can't seem to find the answer to that on Surly's website

  7. #7
    Ariolimax columbianus
    Reputation: nativeson's Avatar
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    Just slapped an older 100mm Reba hand me down on my ogre. Cruising up to Oregon next week to hit up Oakridge for a few days w/a buddy. I'm sure it'll be a good test for the bike. Maybe I'll be able to roll it up to the trails in Santa Cruz in the next few days if I can finish wrenching on my bike. Thanks for posting and all the replies, pics in a few weeks hopefully.

  8. #8
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    I just put a Reba RLT on my KM with 100mm travel and it is awesome. Actually considering changing to 120, but for now very happy with it...
    Attached Thumbnails Attached Thumbnails anyone running a 100mm fork on a karate monkey?-surly-fork.jpg  


  9. #9
    I work in .001 tolerances
    Reputation: HomegrownMN's Avatar
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    Count me in the long travel boat as well.

    I've actually got my Reba set up @ 110mm travel. I like to have a full 100mm when sag is applied. Wouldn't change it for the world and I've been running it that way for a year+

    Some people think the KM will explode if you run more than 80mm forks.

    Truth be told, I find the handling perfect when slowed down slightly on the KM

  10. #10
    Fat boy Mod Moderator
    Reputation: donalson's Avatar
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    I ran mine with at 100mm on an older fisher/rockshox g2 fork... worked great and gave a smidge more bb height which was good
    - Surly Disc trucker
    - '82 trek 560 roadie

  11. #11
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    I have a 100mm Reba and it rides great. My frame was on the smaller side, so the raised front end was a welcomed addition.

  12. #12
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    I run a 100 mm reba as well. With a little sag, not that much difference.

  13. #13
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    I just got a used RS Reba Race that I am pretty sure is set up at 100mm.

    1. how do I tell if it's 100mm or 80mm without needlessly taking it apart?
    2. can/should I make up for the additional height on the front end by lowering the stem?

  14. #14
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    Just measure the exposed part of the fork legs. If the distance is 80mm then it's 80mm. If its 100mm then it's 100mm

  15. #15
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    I am very tempted to do this direction too as I can get a pretty good deal on an Xfusion Slide 29.
    My only concern is that it will make my front end very tall,
    Currently running the stock fork with no spacer under the stem
    When trails gets tougher, Just stand up and deliver.

  16. #16
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    here is my KM with a 100mm RS Reba from 2008(?)


    and here it is a few minutes later when I put the "80mm" KM fork back on:


    the 100mm fork definitely seems to jack the front end up a bit, but I am not taking sag into account.

    the Reba came right back off because the damper is leaking oil, but that needs to be addressed in the suspension forum...
    Last edited by mack_turtle; 08-01-2012 at 07:20 PM.

  17. #17
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    I just did

    Just put on a new X-Fusion slide 29 on my Monkey today,
    Much more comfortable than the stock fork,
    I found that 100mm is just right for the Monkey,
    Attached Thumbnails Attached Thumbnails anyone running a 100mm fork on a karate monkey?-img_0598.jpg  

    When trails gets tougher, Just stand up and deliver.

  18. #18
    is turning a big gear
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    For anyone who wants to reference the actual A/C numbers:

    KM rigid fork 468mm; 43mm offset
    REBA 29 @ 80m 486mm; 46mm offset
    REBA 29 @ 100mm 506mm; 46mm offset
    REBA 29 @ 120mm 526mm; 46mm offset

    Subtracting 20% sag you get:
    80mm - 470mm A/C
    100mm - 486mm A/C
    120mm - 502mm A/C
    Get it unlocked.

  19. #19
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    120?

    So basically, a 120mm. would be somewhat terrible on a 22"?...

    Very interested to see if anyone has done it, and if so what's the verdict?

    Thanks,

    PF

    EXCUSES ARE THE NAILS IN THE COFFIN OF FAILURE.

  20. #20
    is turning a big gear
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    Quote Originally Posted by PanFry View Post
    So basically, a 120mm. would be somewhat terrible on a 22"?...

    Very interested to see if anyone has done it, and if so what's the verdict?

    Thanks,

    PF
    I would not buy a 120mm fork that can't be adjusted.

    Some people like the feel of the bike with a longer fork. I race my 22" monkey with a 80mm Reba and 15-20% sag. I prefer the geometry and handling of the frame as it designed/ intended by Surly, but nothing stops you from experimenting and finding what you like. IMO, it's going to feel like a chopper at 120, but hey- it's a Surly and no two custom built bikes are the same.
    Get it unlocked.

  21. #21
    meh?
    Reputation: Map204's Avatar
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    So what's the verdict on a 120mm fork? I run a 120mm Manitou Tower on an SC Chamelon. I know, I know, it sounds ridiculous, but it actually works well and fits into Santa Cruz's range of recommended A/C lengths for the Chameleon. However, it means I'm still running 26" wheels. The Karate Monkey checks all the boxes for my next bike (hardtail 29er, steel, cheap, good looks, steeper head angle than I have now). However, I own a 120mm 1 1/8" fork so I need to know if it's ok to put my fork on this frame.
    Anyone have pics? Anecdotes? hell, just some reassurance? I've got a broken wrist, so I wouldn't be buying until this summer. If I can do this, it'd be perfect.
    2013 Chromag Rootdown
    2010 SC Chameleon
    2001 Specalized Rockhopper FSR

  22. #22
    Always Learning
    Reputation: BruceBrown's Avatar
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    Quote Originally Posted by Map204 View Post
    So what's the verdict on a 120mm fork? I run a 120mm Manitou Tower on an SC Chamelon. I know, I know, it sounds ridiculous, but it actually works well and fits into Santa Cruz's range of recommended A/C lengths for the Chameleon. However, it means I'm still running 26" wheels. The Karate Monkey checks all the boxes for my next bike (hardtail 29er, steel, cheap, good looks, steeper head angle than I have now). However, I own a 120mm 1 1/8" fork so I need to know if it's ok to put my fork on this frame.
    Anyone have pics? Anecdotes? hell, just some reassurance? I've got a broken wrist, so I wouldn't be buying until this summer. If I can do this, it'd be perfect.
    If you find that 120mm just doesn't feel right, I would think (I don't know the Manitou forks) that you ought to be able to adjust your fork's travel. If not - you always have the option to sell your fork and purchase another. That is, if needed. The Karate Monkey comes with a rigid fork and you may like that.

    After 10 years of riding the KM rigid fork, I now love the 100mm on my KM. I prefer the suspension at my age and the KM"s handling does not seem to suffer with the extra AC...at least with the 100mm fork. Not sure what it would feel like with 120mm.

    BlackKM

  23. #23
    meh?
    Reputation: Map204's Avatar
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    I just sent a message over to Hayes tech support and no, the tower 120 is not adjustable.
    Honestly, I'm not so sure 20mm on the A/C is going to matter to me. I'm not exactly a racer and I'm really not that great of a rider. It's just not going to be noticeable to me.

    Also, thanks for your input!
    2013 Chromag Rootdown
    2010 SC Chameleon
    2001 Specalized Rockhopper FSR

  24. #24
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    How easy (or hard) is it to change out the stock fork?

  25. #25
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    ^not any more difficult than changing any other fork.

    I suggest you read the Park Tool tutorials on:

    Star-fangled nut installation
    Crown race removal
    Threadless Headset Service

    if that sounds too difficult, or you don't have the right tools, you'd better leave it to your local bike shop or co-op.

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