If you look for precision & speed at minimum weight, like a professional cross country racer, the intuitive SRAM X0 Left Hand 3 Speed Twist Shifter feel is your best choice. Ride light, shift fast, & go for the gold. Using SRAM's 1:1 Actuation every unit of cable you pull moves the derailleur the same amount. Actuation stays precise & fluid slogging through mud, bouncing off rocks, rutting through roots wherever you find yourself, whatever conditions you're in.