50mm deep full carbon rim, specifically designed for 25c and 28c tubular tires. Wider 24.2mm rim increases wheel stiffness, reactivity, and aerodynamics. New AC3 All Conditions Carbon Control brake track further improves braking in dry and wet conditions versus previous Bora wheels. G3 Spoking pattern reduces stress and increasing rigidity. CULT ceramic bearings for the ultimate smoothness. Dark labels. 1215 grams per pair. New AC3 brake track further improves braking in dry and wet conditions versus previous Bora wheels 50mm deep full carbon rim, specifically designed for 25c and 28c tubular tires Wider 24.2mm rim increases wheel stiffness, reactivity, and aerodynamics G3 Spoking pattern reduces stress and increasing rigidity CULT ceramic bearings for the ultimate smoothness; Dark labels; 1215 grams per pair