GUIDE TO BREMBO BRAKE DISCS FOR MOTOGP AND ROAD AND INFORMATION ON THEIR USE AT THE FRENCH GP
A month after the 24 Hours of Le Mans, won by the Yoshimura SERT Motul team with a Brembo braking system, the Circuit Bugatti will host the MotoGP World Championship: lap times are 5 seconds faster than those of the World Championship. ‘Endurance but the race only covers a distance of just over 110 km.
According to Brembo technicians, who work closely with all the riders in the MotoGP world championship, this circuit is one of the most demanding on the brakes. On a scale of 1 to 6, he is ranked 4 on the difficulty index, the highest score of this first part of the championship with Jerez. To avoid the risk that the brake discs do not reach the ideal temperature, many riders use brake discs with low braking band, always in carbon, which are preferred in case of rain.
A dozen Brembo discs for MotoGP
Brembo provides teams with a wide range of brake discs: each MotoGP rider can choose from six disc geometries and each of them comes with two different carbon compounds and two different geometries called High Mass and Standard Mass which, in the different diameters available (riders can choose from three different diameters: 320mm, 340mm and 355mm) give a total of twelve different solutions.
A different material but the same care and attention for road bikes
Road bikes and bikes used for track days obviously don’t have carbon fiber discs. That doesn’t mean that the experience gained in MotoGP hasn’t had a positive effect on factory production, though. The T-Drive disc, with its steel braking band and its aluminum support machined in the mass, is a good illustration of this.
The T-Drive system takes its name from the eight T-shaped pins on the disc which, with the same number of slots on the carrier, eliminate the need for fixing studs. This results in both axial and radial flutter, which increases resistance to thermomechanical stresses and transmitted braking torque.
Discover the different varieties of sport discs for the most popular motorcycles.
900 kg from departure to arrival
On each lap of the Le Mans circuit, the drivers use their brakes 9 times for a total of 31.5 seconds, which is no small feat, given that it is the third shortest circuit in the world championship . On the Termas de Rio Hondo circuit, which is 600 meters longer, the brakes are used for more than a second less.
On the Bugatti circuit, MotoGP riders must not approach more than two consecutive corners without using the brakes, which avoids cooling. Despite the absence of deceleration from 200 km/h, the braking system is used for more than 4 seconds during 5 different braking episodes. The overall load exerted by each rider on the brake lever from start to finish is also high: 900 kg.
1.5 G of hard braking at 300 km/h
Of the 9 braking sections of the Le Mans circuit, 2 are classified as demanding on the brakes, 3 are of medium difficulty and the remaining 4 are relatively light.
The most difficult braking section for MotoGP bikes is turn 9: the bikes go from 301 km/h to 105 km/h by braking for 4.5 seconds, while the brake fluid pressure reaches 12, 2 bars. The pilots exert a load of 5.7 kg on the brake lever, experience a deceleration of 1.5 g and cover a distance of 231 meters.
And in video games?
To negotiate turn 9 of the Bugatti circuit in the MotoGP video game, you have to move gradually to the right on the straight and brake just before entering 6th gear, halfway between the first display panel on the right and the second, where there is a strip of concrete on the side of the track instead of grass. Move to the left by downshifting to the end of the gears but without exceeding the trajectory since the next turn is on the right.