Tarmac SL8 Pro Di2Nothing is faster than the Tarmac SL8 thanks to a combination of aerodynamics, lightweight, and ride quality previously thought impossible. After eight generations and over two decades of development, it's more than the fastest Tarmac ever. It's the world's fastest race bikemade even faster with the aero paradigm shifting performance of the all new Roval Rapide CL III wheels. Aerodynamics or lightweight alone don't win races speed is what matters.