Tapered head tube sizes?

col748

Apart from the length of the head tube are the dimensions for example the diameter top and bottom of the tube the same on all models?

Thanks Colin.

cooldad

Yes, except when not.

Edited for dumbness

supersonic

No. Some use an internal bearing, some external, and Giant use a 1+1/4" inch size with the overdrive system. And the E2 format.