... And I dont' have a caliper. Lots of parts don't have numbers on them. Whats the best way to figure out some sizes of stuff? I need a new stem (quill) and want to make sure I get something that'll fit the existing handlebar. I need a kid-back for the thing (old Santana with a 26.6 seatpost). And I'm going to need a hollow axle for the back hub (forget the brand. I can find that out later) so I can make it quick-release.