The SRAM Rival AXS is the left crank arm with an integrated power meter. The power meter is compatible with the DUB spindle and measures the force applied by the left foot, using an algorithm to calculate total power. Collaboration with power meter specialists Quarq guarantees measurement accuracy. The battery life lasts approximately 400 hours. The waterproof design ensures seamless operation in all conditions. The power meter is very lightweight, weighing only 40g. The Wide version is designed for use on gravel bikes with wide tires up to 2.1".