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  1. #1
    Frys With That, Please
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    Upset Old 1.5" Steer Tube vs Newer 1.5" Steer Tube

    Does anyone own an older C'dale with a 1.5" steer tube as well as a new 1.5" steer tube?


    I own a 1994/5 Super V1000 with a 1.5" steer tube and I recently bought my son a '12 Trail SL 29'er 4 that also has a 1.5" steer tube.

    I installed a shorter stem on the Trail SL 4 and figured I could put the longer Trail SL 4 stem on my Super V1000 because they're both 1.5" steer tubes; right? WRONG !

    The steer tube on my Super V1000 is like 39.1mm with a groove machined at the top edge that's 38.1mm (38.1=1.5"). The Trail SL 4 stem fits that groove perfectly but that's as far as it will go. So the old C'dale steer tube isn't really 1.5" but 1.53937".


    My fault is trusting C'dale with their spec's. To me, 1.5" means 1.5".


    Anyone have this experience with C'dale?


    I'm thinking of maybe taking said new stem to a machine shop to see if they can hone/grind out that extra 1mm.

    Any suggestions?
    2012 Cannondale Trail SL 29ER 4

    1994 Cannondale Super V 1000

    1996 Cannondale F500 rigid-fork 69'er

    Motiv 26'er

  2. #2
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    Quote Originally Posted by cda 455 View Post
    Does anyone own an older C'dale with a 1.5" steer tube as well as a new 1.5" steer tube?


    I own a 1994/5 Super V1000 with a 1.5" steer tube and I recently bought my son a '12 Trail SL 29'er 4 that also has a 1.5" steer tube.

    I installed a shorter stem on the Trail SL 4 and figured I could put the longer Trail SL 4 stem on my Super V1000 because they're both 1.5" steer tubes; right? WRONG !

    The steer tube on my Super V1000 is like 39.1mm with a groove machined at the top edge that's 38.1mm (38.1=1.5"). The Trail SL 4 stem fits that groove perfectly but that's as far as it will go. So the old C'dale steer tube isn't really 1.5" but 1.53937".


    My fault is trusting C'dale with their spec's. To me, 1.5" means 1.5".


    Anyone have this experience with C'dale?


    I'm thinking of maybe taking said new stem to a machine shop to see if they can hone/grind out that extra 1mm.

    Any suggestions?
    Its pretty unfortunate but yes its widely known. You could always purchase a cdal specific stem from one of the many reputable shops. Thomson is even making them now.

  3. #3
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    I know what you mean. I tried changing stem from my 2010 SL4 29R to my 2000 F500, same problem. I would love to see a pic of your rigid 1996 f500. I was thinking of changing to a rigid for on my F500..

  4. #4
    Frys With That, Please
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    Quote Originally Posted by poconomtbiker View Post
    I know what you mean. I tried changing stem from my 2010 SL4 29R to my 2000 F500, same problem. I would love to see a pic of your rigid 1996 f500. I was thinking of changing to a rigid for on my F500..

    I'll post a pic here or maybe start a thread on it .
    2012 Cannondale Trail SL 29ER 4

    1994 Cannondale Super V 1000

    1996 Cannondale F500 rigid-fork 69'er

    Motiv 26'er

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