– Haas driver Romain Grosjean has criticised Pirelli's mandatory tyre pressures at the Belgian Grand Prix, which he says makes the rubber "very tricky" to work.Pirelli has raised the minimum tyre pressures by 4 PSI compared to last year's corresponding event, with the fronts at 23.5 PSI and the rears at 22 PSI.Grosjean wound up eighth quickest in the session but was unhappy with the compulsory instructions, and was also hindered by a problem with his MGU-K."It's not been an easy day for everyone," said Grosjean."The tyres are very tricky to work. I'm not so happy with the tyre pressures we have to run here. It makes things challenging."On Super Softs in...
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