Everything you need to know about the demands on the braking systems mounted on the bikes ridden by Vinales, Rossi, Marquez and Dovizioso. With the 3 non-European rounds out of the way, MotoGP heads to Spain for the 4th round of the 2017 season, scheduled to take place from 4 to 6 May on the Circuito de Jerez. Opened on 8 December 1985, this track has hosted the premier class since 1987. Oddly enough, however, in 1988 the race was labeled the Portuguese GP because the Spanish GP was held in Jarama. On every lap, the riders will have to use the brakes 11 times for a total of 33 seconds. In absolute terms, that is not excessively high, especially if compared with the 38 seconds per lap at Austin and the 37 at Losail. However, on these two tracks, the lap records range from 1’55’’ to 2’05’’, whereas at Jerez lap times are 1’39’’ and that gives the Spanish track the highest percentage in the championship of time spent braking: 33 percent.