Though Rotor is best known for selling oval-shaped chain rings, which they say increase power output by eliminating dead spots in the pedal stroke, what we like most about the company is their commonsense, do-it-better approach. Their cranks fit virtually every bottom bracket standard available (seriously!), and they are sold in completely modular fashion so you can buy only what you want, be it cranks, chain rings, bottom brackets, or any combination. The new ANT+ compatible Rotor Power Crank offers some of the most accurate readings available by embedding a strain gauge in each crank arm (as opposed most systems that have just one and use algorithms to compensate). It is the only product on the market to truly measure right and left power balance, and it also collects data on torque effectiveness and pedal stroke fluidity to help you improve your pedaling.