Sram X.4 Single Trigger Shifters - 8 Speed Compatible with ESP (1:1 ratio) rear derailleurs only Updated (over SX4) with dual-lever design like top-end models Compact housing with StraightShot cable replacement system Composite construction with gear indicator window in front of bar clamp Not integrated with brake lever to allow use with various brake options Includes cable and barrel adjuster Number of Speeds: 8 Shifter Style: Trigger Double or Triple: Triple Front Der/Shifter Compatibility: SRAM Mountain Rear Der/Shifter Compatibility: SRAM 1:1 Weight: 130 g.