These Rotor 3D Aero cranks feature DTT technology and a Closed System Concept design that allows Rotor manufacture their crank clamps in the closed position reducing stress risers and structural strain. This significantly improves clamping integrity.
The Rotor 3D Aero TT crank is made from an extruded aluminum bar and then CNC machined with three internal chambers running the length of the crank. This Trinity Drilling System allows excess aluminum to be removed from the core while still maintaining structural strength. This design is much stiffer and a significant improvement on earlier Rotor cranks. A 24mm steel spindle enhances rigidity and laser-etched graphics give a nice look. Perfectly machined 39 and 53 tooth chainrings are 11 speed compatible and blending perfectly with the 3D crankset.
Chainrings are included. Bottom cups are not included and must be purchased separately