Rotor 3D Track crankset
Designed at the Aeronautical Engineering School of Madrid, the 3D Track crank utilizes a special manufacturing process named the "Trinity Drilling System", where an extruded 7075 T6 aluminum bar is intricately CNC-machined with three drilled holes through the entire length of the crank arm.
The result is a unique triple hollow crank arm that enables Rotor’s engineers to remove the excess aluminum in the core while still maintaining the structural strength of the crank, while a super-stiff 24mm stainless steel axle and 144 bcd spider consisting of a solid, smooth disc, vastly improves aerodynamics and increases rigidity.
Rotor 144bcd track chainrings are sold separately but not required.
• 144 bcd
• length: 165, 167.5, 170, 172.5, 175, 180mm
• chainline: 43.5mm
• Q-factor: 147mm
• recommended BB: Rotor 24mm Track bottom bracket (sold separately)
• chainring bolts included
• color: black
• actual weight: 570g (165mm)