SRAM Rival AXS Crankset With Quarq Power Meter Power Every Ride Power is a great measurement to keep track of while you're training. It lets you know if you're getting faster and stronger. The SRAM Rival AXS Crankset With Quarq Power Meter is reliable, elegant, and features Quarq's legendary crank-based power meter. It features a DUB-PWR spindle-based unit that measures left-side power to calculate total watts. It has a long battery life of up to 400+ hours, has a replaceable lithium AAA battery, and is waterproof with an IPX7 rating. Features Lightweight and only 40g heavier than a standard crankset DUB-PWR spindle-based unit measures left side power to calculate total watts Waterproof with an IPX7 rating Long battery life of up to 400+ hours SPECIFICATIONSSpeeds12BB Compatibility DUBChain Ring46/33T, 48/35TCrank Arm Length160mm, 165mm, 170mm, 172. 5mm, 175mm BB Spindle Interface DUBChainring Material Aluminum Bolt Center Diameter (BCD)107 BCDCrank Arm Material Aluminum Chainline45mm Bottom Bracket Included No Intended Use Road Weight TBD | Sram | Rival Axs Crankset With Quarq Power Meter 172. 5Mm, 12-Speed, 48/35T | Aluminum