Increase your cycling performance with the S-ALL Carbon Ultra D28-50 DISC Brake. Featuring unique "shark fins" and wave rims, 5.2mm ultra-wide carbon spokes, and precision ratcheting hubs, the Ultra series is the absolute best in wheelsets chosen. Wheels Drag Wind Tunnel Test We compared the drag of the Ultra wheels to a pair of regular flat-rim wheels in a wind tunnel test. When the air density is constant, at a speed of 40km/h, the resistance received by Ultra Wheels is 1800N, and the resistance obtained by Standard 25mm Wheels is 2080N. Ultra Wheels experience 280N less resistance than Standard 25mm Wheels. "Shark Fins" and Wave Rims The bionic technology of the wave circle originally came from the nodule on the front edge of the humpback whale's pectoral fin. Experiments have proven that this bulge can bring better aerodynamic benefits. Rugged surfaces have better aerodynamic effects than smooth flat surfaces, reducing air resistance. SUPERTEAM has optimized the design of these dimples based on the characteristics of the aerodynamic wave circle, and adopted a "shark fin"-shaped matrix arrangement to better integrate these dimples and the wheel set. 5.2mm Width Carbon Spokes All Carbon Ultra uses 5.2mm carbon spokes, which are by far the widest in the world. Wide carbon spokes have two main advantages: 1. Wide carbon spokes have a larger area in the transverse direction, which makes them more stable when bearing lateral forces. 2. Wide carbon spokes have a larger load-bearing area, so they can disperse more vibration and impact forces, thereby improving ride comfort. The 5.2mm spokes are also just 0.9mm thick and weigh approximately 3.4g each, further reducing climbing and aerodynamic drag. Ratchet Structure Hub All Carbon Ultra 2023 disc brakes feature a 36-tooth ratchet construction hub. The 36-tooth ratchet structure can provide more contact points, thereby enhancing the load-bearing capacity of the wheel hub. A higher number of teeth means a greater contact area between gears, providing a smoother ride and keeping you safe. In addition, it can improve power transmission efficiency and start faster.