EXTREME PERFORMANCE SHIFTING SYSTEM. Stainless Steel Spindle &. Carbon Crank Arm Structure. The ultimate and the maximum that you could ask for in performance and smoothness. The SUPER RECORDT CARBON Crankset is an extraordinary concentration of technology and performance. Extremely high overall stiffness, extraordinary lightness, X. Extreme Performance Shifting System. And spinning on the highest quality CULTT Ceramic Bearings (Ceramic…