Sram Force DM Rotor Arms with built-in power measurement, designed for 12-speed transmission systems, are distinguished by their strictness and lightweight design. Exceptional performance is achieved through integrated construction from a single piece. Durable aluminum and optimized tooth profile provide increased lifespan for the rotor arm. The rotor arm is mounted directly onto the crank arms with 8 bolts. The X-Range technology offers an optimal gear range and smooth pedal rotation, with a 13-tooth difference between the rotor arms, ensuring extremely fast and accurate gear shifting. The built-in power measurement was developed in collaboration with Quarq experts and offers high measurement accuracy of ±1.5%. It is a dual-sided meter, allowing comparison between the right and left sides. The entire system is integrated with the crank arms, allowing maximum weight reduction.

• X-Range – technology responsible for quick and precise gear shifts.
• Advantages through the choice of suitable rotor arms and gear ranges.
• Special tooth profile for quiet chain operation, providing even greater cycling enjoyment.

DZero – the new generation of Quarq power meters designed for accuracy, known for extremely precise measurements and seamless connectivity.