On Wednesday, 1 April 2020 16:47:24 UTC+11, Drw wrote: > > I’m no expert, so I’ll defer, but you are saying a shimano index 9 speed > road shifter will pull the same amount of cable to work a 42t mtn > cassette+xt derailler?
Prior to Shimano going 10-speed, road and MTB both used the same cable pull, so a 9-speed road shifter will correctly index with a 9-speed MTB derailleur across a 9-speed cassette - or vice versa. With 10-speed, you can use a 10-speed road shifter and a 9-speed MTB derailleur to correctly index across a 10-speed cassette. I've successfully used an XT 9-speed SGS derailleur and 10-speed barend shifters to index across a 10-speed 11-40 cassette. Depending on the length of the derailleur tab on your dropout, it may work with 42t - only way to know is to try. You can't use a 10-speed road shifter to index with 10-speed MTB derailleur, as Shimano changed the 10s cable pull for MTB components. With 11-speed, Shimano road and MTB cable pulls are still different, and Shimano also changed the road cable pull, so the 11s road shifters won't correctly index anything with a 9- or 10-speed derailleur. However, the Ultegra and 105 GS 11-speed rear derailleurs will cope with an 11-40 cassette, though officially they are only rated to 34t. So you can use an 11-speed road shifter and road derailleur and still get pretty wide gearing. See for example, https://road.cc/content/feature/246424-how-get-ultra-low-gearing-gravel-bike-adventures . Nick -- 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/2bf8094f-7f0f-4ac3-919c-5741a59740d5%40googlegroups.com.
