Pirelli vows to address ‘marbles' problem 9 December, 2013 Pirelli will try their utmost to solve the problem of track-side marbles ahead of the 2014 Formula 1 season. That is the vow of the official supplier's Formula 1 chief Paul Hembery, amid complaints the heavily degrading tyres of the past few seasons left too much slippery debris alongside the racing line. 'The drivers have of course spoken about it, we understand that and will try to do something about it,' the Briton is quoted by Speed Week.
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