The X1 group has all the important features of the high-priced spread with a modest increase in weight. FEATURES: Zero Loss Engagement for fast shifting Aluminum cover and forged aluminum pull lever MatchMaker X compatible Includes handlebar clamp ?SPECS: Color: Black Shifter Style: Trigger Rear Der/Shifter Compatibility: SRAM X-Actuation Drivetrain Speeds: 11 Weight: 140g