Gen 1 Riv Roads have 80mm of drop, for a BB height of 260mm (according to the early catalog) http://www.campyonly.com/images/mystuff/2006/rivendell_road/rivendell_catalog_3.pdf
That BB height is measured on 700x25c tires. Converting to 650x38 equals a frame drop of 6mm (19mm smaller wheel radius, 13mm larger tire), for a BB height of 254mm. Not a huge difference. But in the same article, Grant already warns about pedal clearance in corners. Lower the bike by 6mm and you should be very conscious of pedal scrapes. Gaining back 5mm of that clearance with shorter cranks isn't a bad idea. I find the advantages of the 650b conversion to be huge (cushy tires and fender clearance), and the risk of pedal scrapes to be a minimal disadvantage. ATMO. Tim On Thu, Dec 5, 2013 at 1:19 PM, Greg J <gregkj...@gmail.com> wrote: > I'm pretty sure the early production Riv Roads had 75mm drop. I also > vaguely recall Grant mentioning how he increased the drop on the > Rambouillet, maybe to 78mm? > > Greg > > -- > 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. > -- 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.
