For each one of the 18 tracks of the 2016 World Championship the Brembo engineers involved in MotoGP, assigned a grade from 1 to 5 to assess the stress that the braking system undergoes during the race.
The forecast appointed only 2 track with extreme or significant ease on braking systems: Phillip Island and Assen. 9 tracks, this year, have been forecast with an average difficulty for MotoGP's brakes. The difficulty rate should further increase for Jerez, Spielberg (the conditional here is a must since this track is at his first time in MotoGP), Brno and Aragon ranked as "Hard" (grade 4) by Brembo's technicians.
Finally, there are three tracks which should be particularly hard on Brembo's braking systems: Motegi, Sepang and Barcelona got a 5, the highest grade.
Historically, Motegi's Twin Ring is the hardest track on brakes due to an abundance of second-gear turns that deeply stress the brakes. So it is for the difficulty of cooling-down disks between a braking section and the next: from the first to the tenth curve of the Japanese track it is almost uninterrupted braking. Besides, the flawless pavement provides good grip that allows an optimum discharge of the braking torque without losing adherence from tyres, stressing the braking system heavily.
Sepang is characterised by heavy braking sections from which the first and the last stand-out: both are characterised by violent decelerations with maximum g strengths higher than 1.6 g, 220 km/h of speed reduction from the begging and the end of braking and lever loads of at least 6.5 kg. The high percentage of time spent braking and the Tropical weather making managing temperatures quite critical both for brakes and riders.
Barcelona, the only one of the 3 “very hard” tracks in the first part of the calendar, is a very technical track with sudden brakes that deeply stress the brakes. The highest criticalities for the braking system are caused mainly by the difficulty of cooling down brakes due to the particular layout of the track, sometimes aggravated by the high temperatures of Spanish late Spring. Braking sections, all very intense and close to each other (5 in the first half of the track), cause very high working temperatures for disks and pads which cannot cool-down sufficiently in the mixed part of the track.