SRAM bought Sachs in 1997, so that makes sense. They just probably took the same 3x7 system and added 8,9 and 10 speed cassettes to it.
The reason I brought this up is that there's been some chatter on the group about 1x10 and 1x11 drivetrain setups. If someone wanted to not bother with a front derailer but still have a wide range of gearing options, this would be one way to go about giving up the front derailer but not giving up the functionality of having 3 ranges to choose from. That being said, these Dual Drive things seem to be unobtainium on the Internet. I couldn't find anyone selling them except some seedy Chinese sites, and at prices that are too expensive to make me want to consider it. Same goes for all the SRAM touring/trekking gear that might be of interest to the Rivendell and Rivendell-ish crowd. SRAM Via GT and Via Centro is what's aimed at the "Trekking/Touring" crowd on their website, and apparently comes in silver because I see the pictures. But you can't find anyone selling it except for a very few odds and ends on Amazon and eBay, and there's no information about whether it would be compatible with SRAM bar ends or not. Too bad, more competition drives innovation and keeps costs down. But if it really only exists on their website as a full groupset, what's the point? I've already wasted enough time looking for it. But anyway :) On Tue, May 6, 2014 at 11:07 AM, Patrick Moore <[email protected]> wrote: > This sort of system comes around regularly every decade or two. Sachs (I > think?) had a 3X7 system back in the '90s, and before that someone > manufactured adapted drivers for SA hubs that with longer axles accepted at > least a 3 speed fw. When rebuilding an early Varsity I converted the > drivetrain to 6 with a standard AW and two ordinary SA cogs, one an 18 > reversed, dish inward, the other a 16 dish outward, and held on by tack > welds to the driver -- this circa 1971 or 2. It worked very well with a > Benelux pull chain rd. > > This sort of conversion made sense back in the days of pull chain rds, but > with modern derailleur drivetrains with such wide ranges and so reliable, > durable, and efficient, I wonder what advantage one would have with such a > hybrid system. > > I seem to recall that the AW has relatively little internal friction in > indirect gears compared to more sophisticated models, but this would leave > you with the external complexity of a derailleur system and the friction of > an internal system, no? > > > > > On Tue, May 6, 2014 at 9:58 AM, Jim Bronson <[email protected]> wrote: > >> This is an interesting concept, combining an IGH with an 11-36 cassette. >> Only part I don't like is the funky shifter. If it could be made to work >> with bar ends, that would be better. >> >> http://www.sram.com/sram/urban/products/sram-dd3-30 >> >> -- >> Keep the metal side up and the rubber side down! >> >> -- >> 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 [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Resumes, LinkedIn profiles, and letters that get interviews. > By-the-hour resume and LinkedIn coaching. > Other professional writing services. > http://www.resumespecialties.com/ > Patrick Moore > Albuquerque, Nouvelle Mexique, Etats Unis > > ************************************* > > "In yourself right now is all the place you've got." > Flannery O'Connor > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > -- Keep the metal side up and the rubber side down! -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
