These chainrings allow to convert your triple crank into a double crankset. Oval Rotor Q-Rings increase your power by emulating a Rotor System crankset. For 4-arm spider with 104/64mm bolt circle diameter.
This crank closes the gap between Rotor's REX 3 and the performance-orientated REX 1 crank. Featuring trinity drilled, cold forged crank arms and 30mm UBB aluminium axle. Version with 2-speed 5-arm 110/60mm spider.