The spec is a max tire size of 700 x 37 (without fender). So going to 650B will increase that, but I don't know by how much. Another point of possible interest is the rear dropouts are spaced at 132.5 so you can use a 130 road or a 135 mountain hub easily.
tailwinds Bruce -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/6f90c3ba-f01e-4532-83ed-8541341dd8a4%40googlegroups.com.
