Kubica: Modern F1 cars are like buses in slow corners

Williams reserve driver Robert Kubica (r) has bemoaned the weight of 2018's Formula One cars, saying they are too heavy.

Kubica believes that the weight of the cars causes more problems in Formula One, such as tyre degredation and the lack of overtaking.

The 33-year old Pole has driven for BMW Sauber and Renault in his Formula One career, which looked to be curtailed by a heavy crash whilst rallying in 2011.

However, Kubica has fought back from his injuries and was in the running to sign with Williams for 2018 to partner Canadian Lance Stroll, however the team decided to sign Russian youngster Sergey Sirotkin instead, leaving Kubica to settle for the role as reserve driver.

On the 2018 cars, Kubica said: "The first thing I noticed was the weight. The cars are now at least 60 kilograms too heavy. In slow corners it feels like a bus.

"Bring down the weight and then many problems will solve themselves."

The problems Kubica was referring to are the lack of overtaking and the fact that drivers have to save their tyres so often, which was less common during Kubica's first spell in the sport.

He continued to say: "From the outside it looks like drivers are all on their own, that's because everybody is keeping their distance because of overheating."

Speaking about the older cars, he told the media: "They weighed 650 kilograms and had 50 kilograms of ballast on board. The tyres also had a shorter life so you could attack the whole race."