About Nitto B135 Randonneur Bar: Classic randonneur touring style, also great for cyclocross and dirt drop riding. Bar slopes upward from the center to the corners, the drops are splayed outward. A randonneur is a participant in a randonnée or brevet. a long-distance ride that passes through check-points within a specified time limits. It is not a race, but a test of endurance with distances of 200-1000 km. All Nitto bars are measured center to center.