Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    long live Guthrie
    Join Date
    Dec 2008
    Location
    Philadelphia
    Posts
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    quill stem not tight enough

    I bought a cinelli quill stem tonight and I can't get it tight enough in the head tube to keep the stem from turning side to side under pressure. What am I missing here?

    The wedge style is like so:

  2. #2
    Senior Member
    Join Date
    Apr 2009
    Location
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
    Posts
    20,680
    Mentioned
    46 Post(s)
    Tagged
    1 Thread(s)
    Start by checking that the wedge thread and exterior is smooth and well lubed. Test it by turning the nut with the stem out of the bike. The wedge should draw in and flare the base without much torque required. If it doesn't, dis-assemble the wedge and bolt, and see if possibly a burr in the conical ID of the stem is blocking the movement of the wedge.

    When the stem is OK, assemble it into a clean steerer, with only a light film of grease or oil.

    You shouldn't have to do this, but you can also increase the holding power by coating the outside of the lower area (where it flares) with coarse lapping compound.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  3. #3
    biked well well biked's Avatar
    Join Date
    Jul 2005
    Posts
    6,799
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Let's get the terminology straight first. The stem goes into the fork's steerer tube, not the frame's head tube.

    Does the stem seem to slide into the steerer tube without any play? It shouldn't be difficult to get in, but it shouldn't be a loose fit, either. The inside diameter of the fork's steerer tube should be 22.2mm.

  4. #4
    Old fart JohnDThompson's Avatar
    Join Date
    Nov 2004
    Location
    Appleton WI
    My Bikes
    Several, mostly not name brands.
    Posts
    12,505
    Mentioned
    8 Post(s)
    Tagged
    0 Thread(s)
    Are you certain you don't have a metric diameter (22.0mm) stem? Metric stems from Cinelli weren't common, but they do exist.

  5. #5
    Senior Member
    Join Date
    Dec 2005
    Posts
    7,819
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Wonder if the guy has a caliper 1st, because measure that using a rule in inches will be a PITA

  6. #6
    Senior Member cyclist2000's Avatar
    Join Date
    Sep 2009
    Location
    Up
    My Bikes
    Masi (retired), Giant TCR, Eisentraut, Jamis Aurora Elite, Zullo (trainer bike), Cannondale, Stumpjumper, Waterford(N+1), Tern D8 (N+1)
    Posts
    2,794
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    is it even close? Is there a lot of lateral play when you just slide it into the steerer?
    I don't do vintage, I bought them new, rode them, kept them. Now they are just old bikes
    http://www.flickr.com/photos/bustercrb/sets/72157623483647522/

Posting Permissions

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