Hi Doug, It is possible to get them on Sunrace thumbie mounts with a slight mod to the mount.
>From a Riv email newsletter: Hack your Sunrace mount to fit a Silver XO shifter If you're itching to use our new Silver XO shifters <http://trk.klclick.com/wf/click?upn=dl8YmQ7DE6P7v5oPiKU5JyefskaQlL0ZbqgzyTMb4w8ARruHTBDPPgWfUitLzIRMyVPVHibJsszi1pSaJFrtBdAKDoPFuqEbfq5ckrN9IeSCWSEHjrszwoizQDgx8JvE6d2o6fI6bbhEg7PTM0OqEZHhQz-2ByY-2FUP4RzPkZj-2FjYxhXD8FlL-2FDxsnwxCmTYvZYT83vDa0Vy7qVR4K-2FfGoP7r3oYVDGxAyfqPzsZ-2F-2FoGYs-3D_frvTkgFEDt0qXyjATjL3dINgGGTwvVX-2Fjh295iSANvx7RKnpi0JC0uAIPpVlmyHqEJH-2Fk9udrlV99OUbqKETV3FWL3XitTDYst6-2BM6NW2ximzHjEjwPJqtoCvciFMTNYfBYSAEGNs92IViYIr1X009CcZd-2BCj8TsFB2Z16Hf4HXpfUPpwQnzAQs50gfEzXPWKjvND0gmwdcG9bLFJStGzrh-2BgQ3Q5gPFpn-2Bd9mxIOUAwvgoaoxqXAQWMgYZN-2Flcxc4BcZ7GbUGBV4E-2B1Rpn-2B0j0S2k64fR0wl-2FfIPf5Hs3lKXEk-2FdJMIRfnHG5P2-2BnwmNlSvPnfOWVm-2F8p3yZFalPIxN6joyKHZszXVOKaDtD4yfzHIE8YVBLbqDUv6dl1b-2BcaNmY01BJeMqPA-2Fki1ob-2BciSuA9WvzPN6uinXtZhdaQ-3D> as thumbies and can't wait for our upcoming XO mount, you can file off the little tab on a Sunrace thumbie mount and use that instead. It works perfectly, and although the Sunrace mount isn't quite as slick as the new Silver mounts will be, you'll at least get to use the Silver shifter which has a much finer ratchet than the Sunracer. Here's an exploded view: The silver tabbed square-in-circle washer can be flipped with the tab up or down. With the tab up it'll stop the shifter from rotating into an awkward position on your bars, but you'll lose some cable-pull. We tested these shifters (tab flipped down) with my 11 speed SLX set up and they worked fine. The shifter is in a hard to reach spot when you shift into the biggest cog, but it definitely works. Hope this helps! Rory Oakland, CA -- 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/d699b74c-a38b-4161-8a2d-0cc52ed606a6%40googlegroups.com.
