The new Super Record Wireless Cranksets are designed to efficiently transmit every possible watt of power to the road for uncompromising perfomance. Excellent stiffness and optimum power tranmission from pedal to drivetrain. USB ceramic bearings for unparalleled smoothness and friction reduction. Optimized design for use with any chainring combination. Symmetrical teeth on the internal chainring. Fluid precise power transmission even with extreme cross-chaining