The Smart ENVE System (SES) 8.9 were developed in the wind tunnel to optimize the interface between the frame surfaces and the wheels, creating an integrated aerodynamics system, allowing the perfect combination of speed and stability. Because the front and rear wheels are affected differently by the oncoming air, ENVE made the front rim depth slightly wider and shallower at 85mm deep, allowing airflow to stay attached at higher yaw angles, thus improving its stability and reducing drag in any wind condition. Since the rear wheel's stability is less affected by the oncoming wind, it is slightly deeper in order to maximize aerodynamics. SES wheelsets are also tested on a variety of frame designs in order to ensure superior drag results across the board. The wheel shape of the 8.9 was precisely designed to produce a predictable and linear response for improved handling and confidence. With such a speedy wheelset comes the demand for maximum stopping power, which is why the braking surface has been textured, allowing for a more positive engagement and better braking in wet conditions. The SES 8.9 combines speed, stability, strength, stiffness and lightweight for a wheelset that is just as dominant in the European peloton as they are in the Ironman.
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