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  1. #1
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    Synapse owners - does your stem looks like that on your steerer tube

    Extension of another thread:
    Cracked aluminum steerer?

    Synapse owners - does your stem looks like that on your steerer tube-86d04e98a91330776cf214634a84ac40.jpg

    Don't mind the vertical line - it's normal.

    When you clamp your stem to your steerer tube, can you make the spacing even at both bolts? It seems that for a given torque, the two halves at the upper bolt always end up closer to one another.

    Everything is assembled and torqued to spec.

  2. #2
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    Did you torque it alternately until you reach the desired NM? If not, try doing it that way.

  3. #3
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    Quote Originally Posted by ARPRINCE View Post
    Did you torque it alternately until you reach the desired NM? If not, try doing it that way.
    I did.

  4. #4
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    Synapse owners - does your stem looks like that on your steerer tube-p1130084.jpg

    Mine has the same problem in reverse. I think I remember trying several times to get them equal but it wasn't having it. I'm over it.
    use a torque wrench

  5. #5
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    Quote Originally Posted by MMsRepBike View Post
    Click image for larger version. 

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    Mine has the same problem in reverse. I think I remember trying several times to get them equal but it wasn't having it. I'm over it.
    Stem pointed down from what I see? That would make it consistent with my problem since mine is pointed up.

    Anyone else?

  6. #6
    tlg
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    Quote Originally Posted by ToiletSiphon View Post
    When you clamp your stem to your steerer tube, can you make the spacing even at both bolts? It seems that for a given torque, the two halves at the upper bolt always end up closer to one another.
    If I'm not mistaken one band is wider than the other. And it's the narrower band that has the smaller gap.
    Makes sense that equal torque would pull them together differently.
    Custom Di2 & Garmin/GoPro mounts 2013 SuperSix EVO Hi-MOD Team * 2004 Klein Aura V

  7. #7
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    Quote Originally Posted by ToiletSiphon View Post
    Stem pointed down from what I see? That would make it consistent with my problem since mine is pointed up.
    I'd call it levelish with the ground, but yes. -17 degree stem pointed down.
    use a torque wrench

  8. #8
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    Quote Originally Posted by tlg View Post
    If I'm not mistaken one band is wider than the other. And it's the narrower band that has the smaller gap.
    Makes sense that equal torque would pull them together differently.
    Seems to be the opposite on my picture. I'll take a closer look

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    Quote Originally Posted by ToiletSiphon View Post
    Seems to be the opposite on my picture. I'll take a closer look
    Checked my bike. The narrow band has a wider spacing... Not sure I get it.

    MMSrepBike, how's yours?
    Last edited by ToiletSiphon; 03-09-2017 at 04:15 PM.

  10. #10
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    Well I have the same stem on another bike with even spacing. Same brand and angle anyway. Also have 5 bikes and all are even spacing but this one, all with similar compression plugs that are low enough to fully support both bolts.

    Zipp stem by the way, alloy service course. Did get this stem used though, so that could be something. All the rest I've bought new.
    use a torque wrench

  11. #11
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    OK I just checked my Synapse. I have the same slight bigger gap at the bottom than the top.

    Adding this is not the original stem. It's a 3T ARX but I bought it new several years ago.


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    Quote Originally Posted by ARPRINCE View Post
    OK I just checked my Synapse. I have the same slight bigger gap at the bottom than the top.

    Adding this is not the original stem. It's a 3T ARX but I bought it new several years ago.

    Stock expansion plug?

  13. #13
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    Quote Originally Posted by ToiletSiphon View Post
    Stock expansion plug?
    Yes (star nut).

  14. #14
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    Quote Originally Posted by MMsRepBike View Post
    Click image for larger version. 

Name:	P1130084.JPG 
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ID:	318247

    Mine has the same problem in reverse. I think I remember trying several times to get them equal but it wasn't having it. I'm over it.
    Well, tried to flip my stem today to see if it was caused by the stem itself. Even with the stem flipped, the spacing is still wider at the bottom. I'm puzzled... Might be caused by the expansion plug?

  15. #15
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    Has anyone of you noticed irregular vertical lines on your steerer, like the one circled below? I have two like that on mine and I'm trying to determine if they are just artefacts of Cannondale molding/curing process or if they are resin cracks. Can't be felt with a fingernail, sound fine to the tap test and not visible when the steerer is looked at from the top.

  16. #16
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    My Cannondale is nude carbon. That thing would probably give you a heart attack. As in everything looks normal to me.

    Seems to me like you're the type of person that should send all of your bikes in to Spyder to be x-rayed just in case. Probably would be worth the cost to you.
    use a torque wrench

  17. #17
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    Quote Originally Posted by MMsRepBike View Post
    My Cannondale is nude carbon. That thing would probably give you a heart attack. As in everything looks normal to me.

    Seems to me like you're the type of person that should send all of your bikes in to Spyder to be x-rayed just in case. Probably would be worth the cost to you.
    I definitely am. I just can't find this service around here.

    Just out of curiosity, could you snap a pic of one heart attack inducing section of your bike?
    Last edited by ToiletSiphon; 04-10-2017 at 12:13 PM.

  18. #18
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    I'm not getting any to come out really good. But if you've seen any nude carbon frames, it's the same. You can see the individual pieces of carbon and seams and all manor of weird shapes. Something like this:


    use a torque wrench

  19. #19
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    Looks like they made a frame with all the leftovers they had

  20. #20
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    Quote Originally Posted by ToiletSiphon View Post
    Looks like they made a frame with all the leftovers they had


    Mine is for sure cleaner. No woven carbon in sight. I think what you're seeing on the Cervelo are repairs/alterations as well as the bare frame. I believe they patched/filled the hole for the cable stop in the down tube and fixed some minor issues, which is where the visible 3k woven patches are. All of the other stuff though is bare UD carbon from the stock frame.
    use a torque wrench

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