To improve our riding, we need a tool like the Stages Cycling Shimano Dura-Ace R9200 R Gen 3 Power Meter Crank Arm to collect important data as we push the pedals to the max. This right-side power meter crank is calibrated individually to ensure a /- 1. 5% accuracy level and uses active temperature compensation to provide this consistent measurement no matter the riding conditions. Built onto a drive side Shimano Dura-Ace R9200 crank arm, the power meter adds just 20g to the base crankset weight to ensure optimal lightweight performance.