SRAM, Rival E1 Crank Arm Assembly, Crank Arm, 170mm, DUB, BCD: Direct Mount SRAM 8 Bolt, Black

Careful engineering has resulted in crankarms that optimize stiffness to weight ratio, with material only where it’s needed.
• 8-bolt interface compatible with power and non-power AXS spiders and integrated chainrings
• DUB bottom bracket adds durability and simplicity
• Aluminum arms optimized for stiffness and light weight
• SRAM Model ID FC-RIV-ASSY-E1