Join Date: Apr 2009
Location: New Rochelle, NY
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
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Originally Posted by laura*
Is that threaded? If so, the mating part has a top half that looks like a crown race, and a bottom half that gets driven inside the head tube.
+1, you have the fork with the headset parts that attach to it. The companion parts are pressed into the head tube of the frame. There's a sort of symmetry, in that the upper H/T cup (cone) looks line the crown race, and the lower H/T cup is simmilar to the upper cup threaded on the fork.
You can't just buy the related headtube parts because they're not usually sold separately, and in any case headset parts, while standardized in terms of frame and fork fit, are not interchangeable across brands or models of headsets.
You'll need to buy a new headset. You'll need to know if it's 1-1/8" (all the same) or 1" which is more difficult because there are multiple standards. Refer to the headset guide here
for the specs on the various standards.
Most likely you have both a fork and frame that are ISO (British) but it's only about 90% odds so you'll want to measure the diameter of the headtube ID and fork crown OD (remove the race to do so.)
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