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  1. #1
    Part of the furniture math2p14's Avatar
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    Stem angles and lengths? help!

    Hi all,

    Ok i just ditched the 110mm x 5deg stem i had, and put an old 90mmx10deg stem i had in the spare box. Now all of a sudden, i can pull wheelies (for the first time in my life) and i could also pull up without pedalling.

    Now there must be some strange gravitational anomaly in my parking lot, or i had an overnight sleeping-wheelie101. Since both are not the case i guess its the shorter stem.

    My knees have a distance of 9" from the bars (straight) at the closest point (knee high) and touch the bars when the bars are at a 45-50deg angle.

    My options are to get either a 90mm X 5deg (thomson), or 70mm x 0deg (thomson), or a 70mm x 10deg (non thomson).

    What do you reckon guys? .i just want the correct angle/length... i ll figure out myself about the brand (thomson, easton vice or diabolus).

    The question is... will the 70mm be too short given the measurements i gave earlier on with the 90mm i currently have?

    What will be the effect between 0, 5, 10 degress rise on the stem? (riding-wise).

    thanks a lot!
    Yannis.
    Where the skid marks stop...the tree begins....:D:D:D:D:D

  2. #2
    NCAA - DUAL CHAMPIONS! a2psyklnut's Avatar
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    Personally, I like Thomson or Race Face Diabolous stems. I've got a 50 mm RF Dia on my DJ bike, and a Thomson 90mm (if I remember right) on my Enduro.

    I'm going to try out the RF on the Enduro just for fun. I'll let you know how it turns out, but right now, I'm liking the 90 on it, so I may just leave it.

    Don't want to stir the sheet pot too much!

    L8R
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  3. #3
    Part of the furniture math2p14's Avatar
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    Cheers Vic,

    My only problem is that i am in a bit of a hurry to order one through my sis in law. Any ideas given the distances i gave earlier on?
    Where the skid marks stop...the tree begins....:D:D:D:D:D

  4. #4
    Pedalphile BurlySurly's Avatar
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    Math,

    Order the Diabolous 70 mm with a bit of rise. It will be fine.
    Dont PM me.

  5. #5
    Part of the furniture math2p14's Avatar
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    Quote Originally Posted by BurlySurly
    Math,

    Order the Diabolous 70 mm with a bit of rise. It will be fine.
    Burly, is there much of a difference between the 0deg 70mm rise thomson and the 10deg 70mm Diabolus?

    (apart from style and 100gr weight difference).

    My biggest concern is fit. Is it normal for the knees to touch the bars at 45-50degree wheel deflection (at the shortest possible point between knee bars ...knee high).????
    Where the skid marks stop...the tree begins....:D:D:D:D:D

  6. #6
    NCAA - DUAL CHAMPIONS! a2psyklnut's Avatar
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    It's pretty normal. I know I can touch my shifter paddles with my knee, with the 90 stem.

    The difference isn't significant in overal cockpit length. It will tighten up your steering and make rider input more dramatic. Your bike will steer quicker as the fulcrum length of the moment arm is shortened.

    L8R
    "Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
    "Your Bike Sucks" - Sky Yaeger

  7. #7
    Part of the furniture math2p14's Avatar
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    Cool...70mm diabolus or thomson then!!!! time to have powersteering at last

    Vic thanks man, if you try the diabolus on the SX drop me a line.
    Where the skid marks stop...the tree begins....:D:D:D:D:D

  8. #8
    pnj
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    i didn't see if this was answered or not...

    the reason you can pull up w/ a shorter stem is your weight is not over the front end as much. a wheelies balance point is over the rear of the bike. if your weight is further toward the front of the bike, it's harder to get the front to come up....

    I don't know about the degree stuff. I run a really really short stem and I run it upside down....
    4130

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