Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member
    Join Date
    Jul 2007
    Posts
    681
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Quill stem & steerer tube problem

    I got a Nitto Technomic Deluxe stem today and am having some trouble with it. I can only get it in to about the minimum insertion mark. The original stem will go in farther. I figured that maybe I had slightly bulged the steerer tube or something, but seeing the thread on tapered steerer tubes makes me wonder if that is what is coming into play. The wedge of the original stem is shorter overall and rounded at the bottom while the Nitto's is more squared off. The short side of the original wedge is also very short while the Nitto's short side is maybe .75 cm. Wish I'd seen the tapered steerer tube thread earlier because I've already taped up the handlebar. Are wedges interchangeable between stems? I didn't think to try the wedge from the original stem on the Nitto stem, so I don't know if it would make a difference anyway, but if it's safe to switch them I'll give it a try.
    Last edited by Pendergast; 08-21-07 at 02:50 AM.

  2. #2
    Senior Member
    Join Date
    May 2004
    Location
    Wilmington, DE
    My Bikes
    2003 Specialized Hardrock, 2004 LOOK KG386i, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1
    Posts
    8,851
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Can you see down inside the steerer tube with a flashlight? There might be a bunch of corrosion/crud inside that had built up right below the wedge on the old stem. You could probably get in there with some sand paper or even a bearing scraper and remove the corrosion/crud.

    Before swapping wedges, measure the angle on the wedge and the stem and make sure they match up like the original combo did. This will be an easy task if you have an optical comparator available but you could probably get a decent estimate with a protractor.

  3. #3
    Sometimes knows stuff. rmfnla's Avatar
    Join Date
    May 2005
    Location
    La La Land (We love it!)
    My Bikes
    Gilmour road, Curtlo road
    Posts
    2,538
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by joejack951 View Post
    Before swapping wedges, measure the angle on the wedge and the stem and make sure they match up like the original combo did. This will be an easy task if you have an optical comparator available but you could probably get a decent estimate with a protractor.
    Or you could put the wedge on the stem and eyeball it to see if it engages evenly as it is tightened.

    An optical comparitor..?
    Today, I believe my jurisdiction ends here...

  4. #4
    Senior Member
    Join Date
    May 2004
    Location
    Wilmington, DE
    My Bikes
    2003 Specialized Hardrock, 2004 LOOK KG386i, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1
    Posts
    8,851
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rmfnla View Post
    Or you could put the wedge on the stem and eyeball it to see if it engages evenly as it is tightened.

    An optical comparitor..?
    You know, you have a good point considering I did suggest eyeballing the angle using a protractor But, I'd hate to see a half to 1 degree angle difference that someone missed using the eyeball method ruin the guy's steerer tube. I just happen to have a comparator readily available at work so the suggestion came naturally. I realize not everyone has these things around though.

  5. #5
    Senior Member Deanster04's Avatar
    Join Date
    Dec 2005
    Location
    Boulder, Colorado
    My Bikes
    Cinelli Supercoursa 69, Ritchey Breakaway Cross, Mondonico Diamond Extra 05, Coors Light Greg Lemond (built by Scapin) 88, Scapin MTB, Stumpjumper 83, Specialized Stumpjumper M4, Lemond Poprad 2001
    Posts
    1,366
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by joejack951 View Post
    You know, you have a good point considering I did suggest eyeballing the angle using a protractor But, I'd hate to see a half to 1 degree angle difference that someone missed using the eyeball method ruin the guy's steerer tube. I just happen to have a comparator readily available at work so the suggestion came naturally. I realize not everyone has these things around though.
    see if the new stem bolt will fit the old steerer tube expansion nut. If it does then use it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •