As the guy who sold you that batch... ;-)
I've never seen larger than 21 tooth for the middle size... I'm the kind of guy who just got a smaller front ring set and used smaller than 14 on the small side, had slightly less weight and the same range. I do know there are some reasons for not going smaller than 14, but I think the slightly reduced efficiency was un-noticeable. yes they wear a touch faster, but I was not in top gear all that often...
And to anyone considering trading Jerry... Two of the 11-13 bottom
clusters are NOS, I'm told they are very rare... I almost kept one
of them out for me.
good hunting
thomas seaman
portland, oregon U.S. of A.
http://www.kokoPedli.com