The DEORE 12-speed right-side shifter benefits from the same technologies as XTR, DEORE XT and SLX; I-SPEC EV. This offers you greater ergonomic adjustments so you can tailor your handlebar controls much more to your liking. Together with the speed of RAPIDFIRE PLUS and a TWO-WAY RELEASE feature you can shift up and down the 12 gears of your cassette faster than ever before.