Rotor 3d30 road cranksetthe 3df bridges the gap between our3dand3dcranks designed for all around performance the 30mm ubb axle and trinity drilled forged crank arms offer balanced and extreme rigidity plus compatibility with almost all bikes the newer version of rotor 30mm axle cranks these forged cranks are the cranks of choice for many brands including focus time ridley fuji and look 3df can be fitted to any 30mm bb system including bbright using the selection of bottom brackets