Campy Ekar is machanical only and has 13 speeds. I've heard nothing but good reviews (also, how high price comments). My guess is that they just have a lot of cable pull and the derailleur is a lower ratio than other mechanicals.
There's also the Ratio Technology retro-fit kit that turns SRAM 10 or 11 speed mechanical into a 12 speed with their SRAM MTB mechanical standard, so one can run road shifters up front and mechanical 12speed MTB in the back. I've also heard good things about this. I think the problems mainly come when people try to make a 1.7:1 ratio derailleur (like Shimano 7-8-9 speeds) work on higher numbers of cogs. On Wednesday, November 30, 2022 at 9:12:00 AM UTC-8 Patrick Moore wrote: > Ted's remark raises an interesting question. I for one didn't think that > so very closely spaced cogs might require fine tolerances that exceed the > everyday capabilities of shift-by-cable systems, what with friction > changing with wear and dirt. > > So, question: Is it generally true that above 10 speeds or perhaps 11 > cable systems don't work very well, or at least, shifting quality degrades > quickly compared to systems with fewer cogs and wider tolerances? > > I recall using a Cyclo Benelux pullchain rd* to shift 2 cogs hacked onto a > SA AW driver; to take an extreme case, I can't imagine that rd indexing 4 > cogs let alone 12. It did index 2: all t'way for'ard and all t'way > backward. (Kidding.) > > So, again, to sum up: do 12 and 13 speed systems require and lock you in > to electric shifting? > > That is a question, not an implicit value judgment. > > > On Tue, Nov 29, 2022 at 11:14 AM Ted Durant <tedd...@gmail.com> wrote: > >> ... >> > Exactly! It's not like I used a super-accurate digital measuring device to >> come up with the numbers. When you're talking .1 mm, you can understand why >> it's hard to make a cable-shifting indexed system work reliably on tightly >> packed gears. I was able to confirm on the road my spreadsheet prediction >> that a Shimano 9-speed lever can work with a SunTour rear derailer and a >> Shimano 8-speed cassette. >> > -- 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/6776d6ed-ed24-46e9-b9a9-79c50938006bn%40googlegroups.com.
