My 3 road bikes use Ultegra 6603 sti shifters, 34 tooth 10 speed cassettes, and 9 speed long cage Shimano mt derailleurs...like a charm. On Friday, April 25, 2014 8:41:09 AM UTC-7, Jim Bronson wrote: > > I'm building up a new frame, and trying to keep it a secret, at least, > until I thin the herd. So I was thinking I would re-use, scavenge or just > get parts out of my box of odds and ends, as much as I can. > > So I have these 10 speed Ultegra 6700 brifters that I got a while back for > a stupid cheap price. Literally, less than the cost of 10 speed bar ends. > They were a takeoff from a brand new bike who's owner's hands were too > small and she switched to SRAM. So they are practically brand new. I > figure, I may as well use them for a while, that way I don't have to go > drop $100 on a new pair of 9/8/whatever speed bar ends. > > The issue is though, I wanted to use a cassette with a 34 big ring. It > seems that 10 speed MTB Shimano derailers are not compatible with 10 speed > Shimano road shifters. I don't know why this would be. I see all the 10 > speed MTB stuff is labeled "DynaSys" > > I do have a 9 speed Shimano MTB derailer, model M-592, that I do have > lying around and I have found postings out there on the Internet that say 9 > speed Shimano MTB derailers should work fine for shifting a road 10 speed > setup. Of course, you know what they say about stuff you find on the > Internet. The derailer is super ugly and Transformers looking, but just to > get me going for now if it would work, that would be great. > > Then, considering other compatibility issues, what about the 10 speed > cassettes? Is the spacing different between 10 speed road and 10 speed > Mountain? What about SRAM cassettes in 10 speed, are they compatible with > Shimano road 10 or is that something else altogether? > > Lastly, what about chains? Shimano seems to have some weird 10 speed > chains that are directional and so forth. Is that really necessary or can > I just use a SRAM (10 speed) chain like I have in the past? (or KMC, etc). > > I suppose I could circumvent some of these issues by just using a Tiagra > 4600 12-30 with a Tiagra long cage, that should work for sure. But I > wanted a few more teeth on that big cog. > > Well anyway, any knowledge on this subject appreciated. I liked it better > when all the Shimano compatible gear more or less worked together. I can > see why people resist going to 10 speed, they put all kinds of obstacles in > your way to run a Rivvy drivetrain. > > -- > Keep the metal side up and the rubber side down! >
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