Shimano electronic shifting excels IA speed in a streamlined package complete with Shimano’s performance-oriented Ultegra Di2 12-speed groupset. Dialed shifting and beautiful ergonomics ensures a great ride and the technology triathletes demand. Aero-optimized wheels Reynolds’ AR58/62 DB wheelset is custom-made for us to ensure the best of aerodynamics and ride quality whether you are training or racing. Premium Continental Grand Prix SL tires offer a sure-footed performance.