Pirelli's 2017 F1 tyre testing programme has begun at Ferrari's test track in Fiorano with Sebastian Vettel debuting the new specification of tyre in the SF15-T.
Ahead of next year's regulation revamp Pirelli secured an extensive test schedule shared between Ferrari, Red Bull and Mercedes working on both wet and slick compounds which will have a wider and fatter tread as part of the new regulations for 2017.
Vettel, in the specially modified SF15-T to simulate the new aero rules, ran a few installation laps on the dry tyres in the morning to get a feel for the new rubber before switching his focus to testing the wet tyres on an artificially dampened surface at Fiorano.
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Pirelli confirmed with the wet tyres 25% wider than the 2016 versions particular attention is being taken to the amount of water displaced in wet running.
Vettel will complete Monday's test programme before handing over to Haas driver Esteban Gutierrez on Tuesday.
Current 2017 dimensions dictate slick tyres will be 305-670 at the front (increased from 245-660) and 405-670 for the rears (increased from 325-660). Intermediates are expanding to a diameter of 675mm while the wets are moving up to a diameter of 680mm. All tyres will retain 2016 size of 13 inches.
After the wet tyre test with Ferrari, Pirelli moves on to its first dry tyre test with Red Bull at Mugello on the 3-4 August.
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