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  1. #1
    "El Whatever"
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    Syncros (and others) stem stack height...

    Hi everyone!!

    Anyone can share please the stack height of their stems??

    Thomson's Elite are 48mm...

    I'm asking because i'm eyeing to give myself as Xmas gift a new bar+stem combo. Go down to 70mm length and wider bars.

    However, I don't really need my bars to be higher. Here's when the stack height comes in... As I'd need to order the right rise for the bars.

    Yeah, I know you can use spacers under the stem and that if anything the short stem could be lower (depending on rise)... But now I have only 3 or 5 mm of spacers under the stem and I don't want to end up with a too high front end (bars 26" and over, could have higher rise).

    Thanks for you input, folks!!
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  2. #2
    I AM I AM
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    Syncros FR 50mm x 15deg, Stack Height: 50mm

    I had to remove a 10mm spacer when I replaced my Thomson X4 90mm stem (stack height of 40mm) with the Syncros

    Are you sure your measurement is correct? A quote from the Thomson site-
    Q - What is the stack height of the X4 Stem?
    A - 40mm, 2mm less than the Thomson Elite Stem.

  3. #3
    "El Whatever"
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    Quote Originally Posted by ducktape
    Syncros FR 50mm x 15deg, Stack Height: 50mm

    I had to remove a 10mm spacer when I replaced my Thomson X4 90mm stem (stack height of 40mm) with the Syncros

    Are you sure your measurement is correct? A quote from the Thomson site-
    Abolutely correct, bro... Mine is a plain Elite. Not X4. And their page says 48mm for that one. Must be the different clamp system.

    Thanks for the measurement on the Syncros!!!
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  4. #4
    TJT
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    Race Face Atlas AM stem. Height 42mm.

    Really nice - just got it. Well made, seems really sturdy, and light.

  5. #5
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    Syncros Bear Hug 70mm stack height of ~45mm

  6. #6
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    If you're looking for low and wide, someone, I think Sunline, is making a wide .5" riser. Salsa also makes some wideish flat bars.

  7. #7
    Nightriding rules SuperModerator
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    Syncros AM 50mm stack height

    FSA Gravity Gap 40mm

    Thomson x4 40mm

  8. #8
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    I love Syncros but only have this on my Trek 7000. I think staying in the range you want is more important then exact figures given every geometry.
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    Finesse is everything.

  9. #9
    "El Whatever"
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    Quote Originally Posted by venus1
    I love Syncros but only have this on my Trek 7000. I think staying in the range you want is more important then exact figures given every geometry.
    Problem is, I'll be making all these changes to the same geometry... That's why I'm being so anal.
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  10. #10
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    Quote Originally Posted by Warp
    Problem is, I'll be making all these changes to the same geometry... That's why I'm being so anal.
    So you want your new set up to replicate exactly what you have now? Compensating for your new shorter stem but maintaining the same point of rotation is a challenge. The exact same action is hard to find. You canít have space shuttle technology here. Wing it & try the 70mm with some rise. What bars do you want to use?
    Finesse is everything.

  11. #11
    "El Whatever"
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    Quote Originally Posted by venus1
    So you want your new set up to replicate exactly what you have now? Compensating for your new shorter stem but maintaining the same point of rotation is a challenge. The exact same action is hard to find. You canít have space shuttle technology here. Wing it & try the 70mm with some rise. What bars do you want to use?
    I want the grips to end up at the same height with a shorter stem and a wider bar.

    But in the end... I guess you're right... I'll have different sweep/rise on the bars and all of it will go FUBAR.

    I was overthinking this issue.
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  12. #12
    Trophy Husband
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    Quote Originally Posted by Warp
    I was overthinking this issue.
    Typical engineer.
    Extreme stationary biker.

  13. #13
    Te mortuo heres tibi sim?
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    why not just get a thomson in the 70mm length? how long is your current stem? a little shorter won't mess with your bar height too much. how wide are your current bars, how much rise? how much wider do you want to go?

    all that'll help a lot for us giving suggestions.
    Florence Nightingale's Stormtrooper

  14. #14
    "El Whatever"
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    Quote Originally Posted by scrublover
    why not just get a thomson in the 70mm length? how long is your current stem? a little shorter won't mess with your bar height too much. how wide are your current bars, how much rise? how much wider do you want to go?

    all that'll help a lot for us giving suggestions.
    I'm running a Thomson in 90mm with a Race Face Evolve XC Low Rise (1") and a bar width of 25".

    Wider?? Up to 27" max I think... I don't have very wide shoulders. Size 38 shirt and 140 pounds for you to have an idea.

    I want to go to a 70mm stem and wider bars to go with it.
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  15. #15
    Te mortuo heres tibi sim?
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    Quote Originally Posted by Warp
    I'm running a Thomson in 90mm with a Race Face Evolve XC Low Rise (1") and a bar width of 25".

    Wider?? Up to 27" max I think... I don't have very wide shoulders. Size 38 shirt and 140 pounds for you to have an idea.

    I want to go to a 70mm stem and wider bars to go with it.
    there ya go. get yourself a thomson 70mm and some bar with a 1.5" rise, and 27" width. move spacers from under your stem if the little bit of extra rise is too much.
    Florence Nightingale's Stormtrooper

  16. #16
    I AM I AM
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    Quote Originally Posted by Warp
    I'm running a Thomson in 90mm with a Race Face Evolve XC Low Rise (1") and a bar width of 25".

    Wider?? Up to 27" max I think... I don't have very wide shoulders. Size 38 shirt and 140 pounds for you to have an idea.

    I want to go to a 70mm stem and wider bars to go with it.
    Exactly the same set up I had! I then went to the Syncros stem, but still the same bars.
    My new bike will come with Race Face Evolve bars which will be wider so interesting to see the difference, If I don't like then some switcharoo will be happening.

    Thomson 70mm with maybe Syncros Gain Bars (1" rise still but 26" wide (660mm)) You would gain 40g in weight for it.

    http://www.syncros.com/bars.htm

  17. #17
    "El Whatever"
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    Quote Originally Posted by ducktape
    Exactly the same set up I had! I then went to the Syncros stem, but still the same bars.
    My new bike will come with Race Face Evolve bars which will be wider so interesting to see the difference, If I don't like then some switcharoo will be happening.

    Thomson 70mm with maybe Syncros Gain Bars (1" rise still but 26" wide (660mm)) You would gain 40g in weight for it.

    http://www.syncros.com/bars.htm
    I can snatch a Syncros Gain, but in 40mm rise... that would send me 15mm higher. But I'm thinking getting a lower stack stem (no dough for the Thomson anyways) and remove the 5mm spacer I have underneath the stem.

    It would be a few mm's (like 5mm I'm thinking) higher, but in the ballpark.

    Weight is not an issue. It should be but I don't really care.
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  18. #18
    I AM I AM
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    Just about to dig something out which should be a good help to ya....


    Here we are, stem fit calculator courtesy of Zinn!

    STEM FIT CALCULATOR

    Plug in all the numbers and it will spit out your effective reach and actual rise when taking into account the head angle. Very handy because you can calculate your current rise given by the stem, add the rise from your bars & then determine what new bar / stem combo will give you that same rise. (hope this makes sense).

    Or the other version:

    http://www.habcycles.com/stemfit.jpg

  19. #19
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    Are you sure........

    Quote Originally Posted by crisillo
    Syncros AM 50mm stack height

    FSA Gravity Gap 40mm

    Thomson x4 40mm
    the Syncros AM Stem is 50mm stack height?

  20. #20
    I AM I AM
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    Quote Originally Posted by daugela
    the Syncros AM Stem is 50mm stack height?
    The Syncros FR certainly is, and the steerer part on the AM does look pretty much the same hey?

    The FR does measure exactly 50mm (tape in photo isn't quite straigh so looks to be out by a couple of mm).




    Last edited by ducktape; 12-27-2007 at 01:00 PM.

  21. #21
    Nightriding rules SuperModerator
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    Quote Originally Posted by daugela
    the Syncros AM Stem is 50mm stack height?

    yep...

  22. #22
    "El Whatever"
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    Here are some comparators:

    Stem

    Frame and TT

    Bike
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  23. #23
    "El Whatever"
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    Quote Originally Posted by Warp
    Here are some comparators:

    Stem

    Frame and TT

    Bike

    BTW... I ended up going to a FSA Gap stem in 75mm X 6į and Syncros Bulk 7075 20mm rise bars. I'll use spacers under the stem to get the height I want.

    I'll be gaining like 70-75grs... but I'll be dropping like 100grs on the fork and 10grs on a hub.... Not that I really care about weight
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