Take the 2-minute tour ×  Trying to replace the headset cups and
race faces on a steel frame for 1" fork. Removed the old cups by
gently knocking them in a circle with a steel pipe of the
correct diameter. However, the new cup are a hair too small -
although no wobble, they are freely inserted and removed from
the head tube. The slack is much less than a mm.  The LBS said
that this is normal, and that they can fix it, by inserting
something in between the head tube and cups. So is it normal?
The headset is this one and the fork is a cheap Zoom 1 inch
threaded fork.  What should be inserted, so that the cups can be
correctly installed? (I was planning on using the hummer and
piece of wood technique)   I purchased a calliper. 30.0mm cup,
30.2mm frame. Тhe cup is really easy to insert while pinching it
with fingers, although it does not wobble.   I purchased
2-component glue and nailed the thing in place.  share|improve
this question Do you have access to calipers to measure the ID
of those cups? –  WTHarper Nov