1 inch headset question - steerer tube hitting headset

xman007
xman007 Posts: 22
edited November 2010 in Workshop
I am replacing the forks on my road bike. I am having a problem with the new 1 inch forks in that after the crown race there is a step up to the fork steerer for about 20mm . This is hitting the inside of the lower headset. I am using an older Campag headset. Anyone else had this problem. Maybe the depth of the older Campag headsets were thicker??

Comments

  • Monty Dog
    Monty Dog Posts: 20,614
    Firstly, are you sure your fork is only 1" and not 1.125"? Have you manged to fit the crown race to your new fork? Check the fork steerer diameter - you may have JIS rather than ISO standard which is slightly bigger. Check out SheldonBrown.com.
    Make mine an Italian, with Campagnolo on the side..
  • xman007
    xman007 Posts: 22
    Definitely 1" but the fork steerer says 27?? Is this the JIS spec? I have taken it all to a shop so I dont mash it!! Prob a new headset (I can use the old one on turbo trainer bike) What a palava for a small job!
  • Monty Dog
    Monty Dog Posts: 20,614
    JIS crownrace seat is 27mm dia whereas ISO is 26.4mm - I have filed one down in the past.
    Make mine an Italian, with Campagnolo on the side..

Categories