I have both a 650b bike and a 700c touring bike with somewhat fat 42c tires, and don't really notice a difference in steering response between the two. They have similar angles and trail, and handle very similarly. I agree that fit and comfort are going to be the most important thing.
Another thing to consider is that there might be a bit more 'toe- overlap' on a 55cm AHH with 700c wheels versus a 54 or 56 with 650b tires (which will probably have none at all). -Matt -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.