The smaller San Marcos frames also have 650b wheels, which gives Grant even more wiggle room to design a slack seat angle. Like Anne said, the seat tube is longer because the seat tube angle really is that relaxed. Longer chainstays helps a designer too. In smaller frames, short chainstays + big wheels = steep seat tube angle.
I'm sorry for the misinformation earlier; the 51cm top tube measurement is inside-to-inside, not c-to-c. Tim -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
