The fulcrum racing speed 35 is perhaps the most versatile wheel in the line up and offers serious performance advantages in almost every situation light enough to climb the steepest gradients reactive enough to please the strongest sprinter and aerodynamic enough to save precious energy this wheel is the perfect do it all performance wheel development of the racing speed 35 was more complex than simply shrinking the current 50mm rim profile and adapting spoke length to match fulcrum engineer