Brembo Unveils Round 11 of World Superbike in France


 An in-depth look at the braking systems on the production-based motorcycles at Circuit de Nevers Magny-Cours


Third to last appointment of the season for the Superbike World Championship, from 27 to 29 September 2019 at the Circuit de Nevers Magny-Cours, in France. Located in Bourgogne Franche-Comté, the circuit's 14 grandstands can welcome a full 139,112 spectators. The racetrack hosted Formula 1 from 1991 to 2008 and the World Motorcycle Championship in 1992. ​

The first Superbike race was held there in 1991, and then again in 2003. It has been part of the championship every year since then. As a homage to other historic racetracks, some of the bends of the Magny-Cours are named after other circuits. ​

The track features alternating high-speed curves, where brakes are hardly used at all, and intense braking sections where the braking system is really put to the test: in two spots the speed upon entering the bend is lower than 60 km/h (37 mph) and in a couple others no greater than 80 km/h (50 mph). ​

The characteristic rain and low temperatures can be an issue for the braking systems, keeping them from reaching the minimum working temperature: in 2015 Race1 was held under the rain at 11°C while Race2, despite being dry, still only got up to 14°C. ​

In 2016 Race1 was held under the rain while in 2017 both Race1 and Race2 in dry weather but at just 16°C. ​

According to Brembo technicians, who work closely with 15 World Superbike riders, Circuit de Nevers Magny-Cours is a demanding circuit for the brakes. On a scale of 1 to 5, it earned a 4 on the difficulty index, exactly the same as Spanish tracks of Aragon and Jerez. ​

grafico sbk x donington.jpg  

The demand on the brakes during the GP


Despite there being 17 bends, World Superbike riders use their brakes 9 times in each lap for a total 28 and a half seconds, equivalent to 29 % of the time for each lap. Figures lower than that are only found at Philip Island, 23% and Buriram, 27%. ​

At 1.04 G​, mean deceleration per lap isn't particularly elevated, but the value dips at the last curve, before the final chicane, which stands out at 0.7 G​. ​

Summing up all of the force applied by a rider on the Brembo brake lever from the starting line to the checkered flag, the result comes in at about 0.84 ton: that's no small effort in the event of rain, which causes the rider's body temperature to drop. ​


The most demanding braking sections

Of the 9 braking sections at Circuit de Nevers Magny-Cours, 4 are classified as very demanding on the brakes, 3 are of medium difficulty and the 2 remaining sections are light.​

The most demanding by far is Adelaide (curve 5) with a speed gap of nearly 250 km/h (155 mph): Superbikes come in at 292 km/h (181 mph) and slow to 48 km/h (30 mph) in 5.7 seconds as they travel 238 meters (781 feet). ​

The riders put 5.6 kg (12.3 lbs) pressure on the brake lever and are subjected to a 1.5 G​ deceleration. The pressure of the Brembo HTC 64T brake fluid gets to 12 bar.​
Despite a much smaller speed gap, from 249 km/h (155 mph) to 139 km/h (86 mph) at curve 11, the pressure still gets to 10.3 bar. This braking section only extends for 149 meters (489 feet). and 2.9 seconds. ​

Nürburgring (curve 6) is also demanding on both the rider and the braking system: from 247 km/h (153 mph) to 140 km/h (87 mph) with 1.4 G​ deceleration and brake fluid pressure at 10.7 bar.​
However, the braking session only lasts 2.7 seconds, through it extends for 140 meters (459 feet). Lycéee (curve 15) is also worth noting, at 4.4 seconds and 174 meters (571 feet) it is the second braking section on the track when focusing on time and distance.​

On the other hand deceleration is lower (1.3 G​), as are the load on the brake lever (4.9 kg& or​ 10.8 lbs) and brake fluid pressure (10.4 bar). ​



Brembo performance

Bikes with Brembo brakes have won all 34 of the Superbike World Championship races held at the Circuit de Nevers Magny-Cours. ​

An incredible result since it was achieved with bikes from 6 different Constructors: 16 Ducati victories, 8 Kawasaki, 4 Yamaha, 3 Aprilia, 2 Honda and 1 Suzuki. ​

Of the riders, Noriyuki Haga from Japan and Jonathan Rea from UK triumphed most often with 5 victories.