• Alloy brake and shift levers
• 11 Speed DoubleTap with Zero-Loss shifting
• 2-Piston open system
• Piston Size: Fr 19mm, Rr 18mm
• 2-Piece forged aluminum caliper w/ top loading pads
• For 140 or 160mm rotors
• Compatible with 11 speed derailleurs only
• -01, -02 : Post Mount; -03,-04: Flat Mount”
• SRAM Model ID: SB-RIV-HRD-A1