Upgrade your cycling performance with the SRAM Rival AXS Power Meter Left Crank Arm and Spindle Upgrade Kit the ultimate solution for precise power measurement and seamless integration. Designed for serious riders seeking to optimize their training, this state-of-the-art power meter platform is fully contained within the DUB spindle, offering a sleek, minimalist design that eliminates clutter and enhances bike aesthetics. Crafted with lightweight materials to add minimal weight, it ensures your ride remains agile and efficient, whether you’re racing, training, or conquering daily miles. Built on proven Quarq technology, this power meter delivers industry-leading accuracy and reliability, providing detailed data on left-side power output to help you analyze and improve your cycling performance. The upgrade kit features long-lasting, user-replaceable lithium AAA batteries, offering over 400 hours of ride timeso you can focus on your ride without frequent replacements. Waterproof to IPX7 standards, it withstands adverse weather conditions, making it suitable for all seasons and terrains. Compatible with SRAM DUB bottom brackets (sold separately), the kit simplifies installation and durability, making it an affordable and easy upgrade for any eTap AXS bike looking to add power measurement capabilities. Whether used for performance optimization, training analytics, or competitive racing, the SRAM Rival AXS Power Meter Left Crank Arm and Spindle Upgrade Kit provides an innovative, high-performance solution to elevate your cycling experience.