Just as not every pro rider is capable of a victory at Roubaix, not every high end wheelset is created with the right mix of technology and construction to excel in the brutal conditions of the Hell of the North. Mavic's Cosmic Carbone 40 Tubular Wheelset is one of those that can, and has, with a 2011 Roubaix victory to prove it. Displaying groundbreaking advancements in heat dissipation and carbon construction, as well as Mavic's attention to detail throughout the wheelset, right down to the tires, the Cosmic Carbone 40 confidently handles conditions that slow other wheelsets down all while keeping an eye towards getting to the finish line as quickly as possible. To develop a rim that can go beyond the point where others would fail, Mavic looked beyond the heat dissipating rim treatments that other manufacturers have relied on for years to help mitigate the issue. Instead, Mavic rethought the construction of the rim itself, focusing their efforts on a proprietary resin and a construction process called TgMAX. TgMAX begins with a standard process of laying up unidirectional 3k carbon. These layers are applied manually in order to ensure that the proper positioning of each layer of carbon is achieved no corners cut here. Mavic then furthers the process and incorporates several types of resins, affixing them to the carbon structure with a proprietary heat treatment process. After this, the rim is tempered at high pressure, a process that relines the carbon crystals to raise the amount of heat the rim can shrug off before it fails. The point of failure is known as the glass transition temperature, or Tg. At a material's Tg, it transitions from a stiff substance to a rubbery one, which accounts for the failure of carbon rims under hard, heat producing braking, often occurring during long, steep descents. TgMAX realigns the carbon fibers' crystals to maximize the amount of heat the rim can endure without failing, translating to more braking with a reduced likel...