• Exact Actuation 11 speed shifting
• Aeroglide Pulleys
• Max tooth 28T for the short cage
• Max tooth 32T for the WiFli RD
• Forged aluminum B-Knuckle, magnesium inner link, carbon outer cage
• Weight: 178g
• Compatibility: 11sp cassettes and chains only
• SRAM Model ID: RD-FRC-B1