[QUOTE=styggno1;19557242]On my 1989 I use a 27,0 - and it is a nice fit. Might have been able to squeese a 27,2 in it.

That's a fine bike. Mine is a bit more beat up and has drop bars. I'm thinking 27 is the diameter with later Ritchey Logic DB being 27.2. Maybe Tom figured a way to skinny up the tubing in the early 90s.