Cosmic pro carbon exalith offers a high level of aerodynamic efficiency and stiffness with no sacrifice in weight its long time proven carbon aluminium rim technology for clincher is further enhanced by the exalith 2 treatment extra light spokes and extra smooth hubs now with metallic grey stickers key benefits aerodynamic yet light 52 mm rim profile ism inside to reduce weight and inertia extralight bladed spokes and aero hubs attractive carbon look with clincher compatibility