SRAM Rival D1 DUB power meter 48/35. 172.5 mm crank arms. New product. The SRAM RIVAL AXS QUARQ DUB Power Meter Crankset is designed to provide reliable and accurate power measurement on every ride. Integrating Quarq technology, it combines aesthetics and performance at a more accessible price. Its DUB-PWR power sensor, integrated directly into the DUB spindle, measures left-leg power and calculates total power. This sleek design ensures increased compatibility with many bikes. Lightweight, at only 40g heavier than a standard crankset, it guarantees over 400 hours of battery life thanks to an ...