Elevate your cycling performance with the SRAM Rival AXS Power Meter Left Crank Arm and Spindle Upgrade Kit. Engineered for precision and reliability, this upgrade kit features a power meter platform fully integrated into the DUB spindle, ensuring a seamless fit for a wide range of bikes. This innovative technology not only minimizes additional weight but also empowers you to track your power output, helping you push your limits and reach the finish line faster.DUB-PWR spindle-based unit accurately measures left side power to calculate total wattsElegant integrated design for a sleek appearanceProven Quarq reliability and accuracy, trusted by cyclistsLong-lasting battery life (400+ hours) to support your riding seasonUser-replaceable lithium AAA battery for convenienceCompatible with DUB bottom bracket (sold separately) for enhanced durability and simplicityWaterproof (IPX7 rated for immersion up to 1 meter for 30 minutes)Lightweight, adding less than 40g to your standard cranksetA straightforward and cost-effective power meter upgrade option