You are right. It appears that, at least for Shimano and SRAM cassettes, the center-to-center cog spacing is 5.0 mm in the 7-speed, vs. 4.8 mm in the 8-speed, vs 4.34 mm in the 9-speed. Good to know. If I ever try friction shifting again, I will pick up a 7-speed cassette.
http://sheldonbrown.com/cribsheet-spacing.html On Tuesday, February 25, 2014 2:08:37 PM UTC-8, Steve Palincsar wrote: > > You are wrong about spacing. See sheldon on this. > > HunqRider <pot...@gmail.com <javascript:>> wrote: >> >> I originally set up my current bike with an 8-speed cassette and Silver >> friction downtube shifters. I could never get the hang of it; it was just >> too fussy to try to get the proper gear with no rubbing. Going down to >> 7-speed cassette would not offer much help, since 7-speed and 8-speed cogs >> have the same spacing. So I switched over to an 8-speed brake/shifter >> combo from Shimano (brifter), and it's been smooth shifting ever since. I >> used to ride an old Centurion with a 5-speed freewheel, now that setup made >> friction shifting easy! But today's cassette cogs are spaced too closely >> for clean friction shifting, in my opinion. >> >> > -- > Sent from my Android phone with K-9 Mail. Please excuse my brevity. > -- 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.
