So, I think this would work (although the Sheldon calculator has no 584 wheel size, I used 27" nominal as option):
24/40 with an (11-13-15-18-21-24-28-34) 8-speed cassette would give me the ratios I need. That is like all the ratios of my current middle and outer rings combined with similar jumps between cogs. I could not get wide enough ratios with a 7-speed without huge cog jumps, so looks like I would have to use an 8-speed, but allowing good friction shifting still. But that would give me the ratios I need in one big ring, with the 24 as the bail out. Though the 6 cog jump to the largest cog looks like it might, in practice be too much. Maybe I just need to stick with the triple. Too much thinking. -- 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 https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
