According to the Brembo technicians who work closely with all the MotoGP World Championship riders, the Le Mans circuit is a moderately demanding circuit for the brakes. On a difficulty index scale of 1 to 5, it earned a 3, the lowest score of all the tracks of this year, along with Misano Adriatico and Cheste.
The environmental conditions of October might convince the riders to use carbon discs with a low braking band, to ensure the right operating range in terms of temperature. Even in the event of rain, the majority of the riders will probably opt for carbon rather than steel.
Brembo carbon in MotoGP, whatever the conditions
Over the last three years, Brembo has done away with a long-standing taboo: since carbon was introduced in the premier class, it had always been set aside in rainy situations in favor of steel discs. To ensure a good friction coefficient, carbon needs to reach a temperature of at least 250 °C (482 °F) and, until recently, this was somewhat difficult in wet and rainy conditions.
The carbon developments made by Brembo have allowed the operating temperature range to be widened, however. This, along with the enhanced performance of the engines and tires, has boosted the temperature of the discs even in the rain, meaning that steel has largely fallen by the wayside.