Shimano Dura-Ace SL-BS79 Double/Triple 10-Speed Bar End Shifters The right-sideear shifter is 10-Speed, index-only, left-sideront is 2-Speed All bar-end road shifters produced after Nov 2008 have an I.D. spec fit range of 19-22mm keyword search: TT Double or Triple: Double Double or Triple: Triple