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  1. #1
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    Lower back pain, handle bar height/Lefty stem???

    I have a 2011 Flash 29er 1 ( aluminum) Recently I've been getting some lower back pain which I feel is related to being to raked over. I've adjust my saddle and that's helped but I was looking to raise my handlebars..
    I'm having trouble finding a stem that fits the lefty, where do I find them? Is this the best route? I also hve the stock handle bar, should I just get a bar with a little more rise?

    ANY INFO will be helpful, I'm still very wet behind the ears in this whole MTB thing. So thank you in advance for your help!!!!

  2. #2
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    I have the same bike. I'm 6'4" and during my bike fit, my dealer swapped out my stem to a little taller one to get my body position a little more upright.

    You can simply go with a riser bar. I prefer the look of a flat bar on my XC bike. Not sure where to get the proper stem but a reputable LBS should be able to track one down. Did you buy the bike from a LBS? If so, I would start there.

    Also what is your height and frame size. Do you feel stretched out or just leaned over. Theres a difference IMO.

  3. #3
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    I have a medium framed bike and i stand 5'8" on a good day right after ive gotten out of bed... Haha. When i tested out the bike the LBS employee stated that i had a longer torso and shorter legs so i think thats why i feel leaned over maybe not so much strectched out..

    The LBS i purchased from isnt that close to my home so i was hoping to look for the parts online...

    I spoke with a women at cannondale that suggest i try either a 20degree stem, a lefty steer tube extender ( which adds like 2" and sounds like over kill) or bars with more rise. Im open to the stem or new bars but being very green at bike mods i figured i pick some brains and go the route someone else has instead of trying to throw money at this and buy something that doesnt really solve my issue.

    I love the bike, this has been the only drawback for me.

    CAn anyone suggest a good set of handle bars or should i locate a stem? there seems to be a lot on ebay..

  4. #4
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    Yea. I dont think your necessarily stretched out either. I would start with a riser bar. I would suggest a new stem but without going to a LBS, you might have a tough time with finding a lefty stem. If that doesnt solve the issue try maybe a shorter stem.

    BTW, this is all assuming that you were properly fit to the bike. Proper seat height, fore aft position etc.

  5. #5
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    I'm on a medium Flash 29 at 5'8 with a 32" inseam. My body is the opposite, shorter torso with longer legs. Here's what I had to do to get proper fit.

    When I first built up the frame from my old F29 Caffeine, I was running riser bars with 100mm x 5deg stem and the stock 380mm seatpost at the max line. Felt like my hands were too high and my body was too stretched out. Tried flipping the stem to -5 but didn't feel much better.

    I'm now running an SI stem at 90mm x -5deg and flat bars with 11 deg bend. I've installed a 410mm Thomson post raising the seat height about level with the bars and centered in the clamp. All is good now. Might try moving the seat alittle forward and higher to see how it feels.
    2014 Cannondale F29 Carbon 3
    2009 GT Peace 9R SS
    2008 Cannondale Prophet 4, Lefty Max TPC

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