But the real upset came with the 2015 San Marino GP: the race started in dry conditions, but after a few laps it began to rain heavily. All the MotoGP riders returned to the pit stop to change bikes (opting for brakes configured for wet conditions), all except for Bradley Smith (Yamaha Tech 3).
Despite temperatures dropping, his carbon fiber discs didn't suffer any failure and the Brit was able to take second place. Since then, Brembo has ramped up its testing of carbon fiber discs under the rain, all the while leaving MotoGP riders completely free to choose their brakes. Finally, at the 2016 Malaysia GP, some asked to try the brakes, due to issues with the weather and the intermittent rain.
Having taken to the track on Friday with rain tires and steel discs, some riders started to complain about the poor performance. Marc Marquez choose to experiment with Brembo's 320 mm low-end carbon discs (protected by the covers to maintain the temperature) and immediately appreciated the advantages.
Two days later, the race was interrupted by a powerful downpour and, despite the flooded racetrack, the Spanish rider opted for Brembo carbon discs. Brembo technicians analyzed the discs and telemetry at the end of the race and noted the rider's comments that he hadn't had any issues.