Paul di Resta, Force India, Jerez, 2011

Tyre marbles a problem for overtaking, says di Resta

2011 F1 testingPosted on | Author Keith Collantine

Paul di Resta, Force India, Jerez, 2011
Paul di Resta, Force India, Jerez, 2011

Paul di Resta says the new Pirelli tyres generate an “incredible” amount of marbles which could make overtaking difficult.

Chunks of rubber come off the tyres and form ‘marbles’ which lie off-line on the track.

Speaking after his first run in the Force India VJM04 he said:

“I did run the track after the first day and the marbles off the tyres were incredible.

“You could actually see it driving around. We were doing some aero passes earlier and when you go off-line the pick-up is incredible. And when you try to drive again the tyres don’t seem to clean up.

“But it’s just one of these things, you’re not sure how it’s going to be. It really depends on how the track rubbers in.

“This track, after three days, should be in good shape. It’s not too much of an issue when you’re on-line but overtaking could get a bit difficult. If you dive down the inside and there’s marbles everywhere it’s going to be difficult to stop.

“They’re not all falling apart, it’s not nearly as bad as that, there’s just a good bit of degradation.

“It’s difficult to put your finger on what each person is using. It’s not necessarily your softer compounds that are difficult to get on with and I think that’s what you’re seeing. ”

Di Resta spent much of the test working on brakes:

“Initially the first impressions were quite good. We have had quite a difficult day with brakes and stuff, for me getting confident with it.

“We did try and solve problems as much as we could for me through the day and it was more about just trying to get comfortable in the car so we can have a good programme tomorrow to try and run through some set-ups once I’m in a good situation with the car and have a good enough feeling to adapt myself to that.”

But his session finished when he spun off late in the test:

“I locked the rears – I have had a lot of braking issues today. I’ve not been confident, I’ve not been happy with them, and it just caught me out.”

Vitaly Petrov reported similar difficulties yesterday in his Renault, but unlike that car the Force India has not run KERS at this test.

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Image ?? Force India F1 Team