SRAM Rival 1x XPLR Wide Crank Arm Assembly - 172.5mm 12/13-Speed 8-Bolt Direct Mount DUB Spindle BLK E1 MFPN=00.6218.061.000 These are the lightest weight

These are the lightest weight and best looking stainless steel single speed cogs available

} Revolutionary design evolved from 20-plus years of experience with tubeless systems

The two-piece design consists of a 7075-T6 aluminum alloy spider and SUS410 stainless steel brake track to balance light weight with reliable thermal management and structural performance

Purple ZERO +½º

Ensures uniform and careful wax application

SRAM Rival 1x XPLR Wide Crank Arm Assembly - 172.5mm 12/13-Speed 8-Bolt Direct Mount DUB Spindle BLK E1 MFPN=00.6218.061.000 These are the lightest weightSRAM Rival 1x XPLR Wide Crank Arm Assembly 172. 5mm 12 13 Speed 8 Bolt Direct Mount DUB Spindle Black E1. SRAM has taken aluminum to another level. Careful engineering has resulted in crankarms that optimize stiffness to weight ratio with material only where its needed8 bolt interface compatible with power and non power AXS spiders and integrated chainrings (Chainring and spider sold separately) DUB bottom bracket adds durability and simplicity