As Philip said, you don't shift as with a usual multiple gear system, but only for hills long enough to make it worthwhile. Personally, I use the bigger of the 2 cogs very rarely, but when I do, they're useful -- eg, one ride involves a ~ 3-4 mile climb; another a 5-6 mile climb; those make stopping to shift, even stopping to flip a wheel around for a cog on the other side of the hub, worth it.
You can't use any derailleur with fixed cogs (one exception) because the momentum of the wheel/cog if you should stop pedaling to keep the ring strictly in time with the cog will make the chain wrap up on the cog, and if you stop pedaling fast enough long enough or suddenly enough, the chain will yank the rd up and break it, in the same way that getting a stick into the derailleur will break it. There was a German rd in the 40s or 50s that could handle 2 fixed cogs if they were no more than 2 teeth or so apart; the slack takeup requirement was so minimal that the rd could be designed to withstand the chain wrapup forces. At any rate, that was the idea -- it didn't last, so maybe it didn't work. On Fri, Jan 12, 2018 at 9:53 AM, Doug Bloch <dougbl...@gmail.com> wrote: > The Dingle is one of these things I’ve suspected for awhile I would like > in theory but not in practice. > > I could never get over the idea of having to stop and move the chain > manually, and I was never clear if this could be engineered to be used with > a derailleur, essentially giving you a geared fixed gear bike. The same > goes for the White Industries DOS ENO. > > Doug Bloch > Alameda CA USA > > -- > 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. > -- Resumes, LinkedIn profiles, bios, and letters that get interviews. By-the-hour resume and LinkedIn coaching. Other professional writing services. http://www.resumespecialties.com/ www.linkedin.com/in/patrickmooreresumespec/ Patrick Moore Alburquerque, New Mexico, Etats Unis d'Amerique ************************************************************************** ************** *Auditis an me ludit amabilis insania?* -- 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.
