The best combination of reliability and lightweight for the most versatile aero wheelset mavics cosmic carbone 40 t is paris roubaix proven yet capable of climbing the steepest climb key benefits the perfect blend of lightweight and aerodynamics 40 mm wind tunnel optimized rim profile full carbon extra light rim carbonalloy hubs 230 grams yksion pro tubular tyres high stiffness 3k full carbon fibre rim oversize aluminum axles optimized spoke dish and lacing race proven in