The 'Tour I'm working on spends most of its time on the highway, so I'm seriously considering a UDP. Will a UDP for ANY Zetec work? Since this isn't for racing (will probably become wifey's DD until I buy her a new car) I'm not looking for a radically smaller pulley. However, when I search for UDP's for Zetecs, most don't tell me the diameter, just assure me that theirs is the greatest thing since sliced bread.
Anybody else here using a UDP? How did you go about shopping for one?