l struggled to gauge whether the wet conditions were suitable for racing. Several drivers complained of aquaplaning, with Marcus Ericsson, Felipe Massa and

Nico Rosberg is among a number of F1 drivers who hope Pirellis wet-weather testing this year produces a better extreme tyre for 2017.Sundays Brazilian Grand Prix was red flagged twice and featured five safety car periods as race control struggled to gauge whether the wet conditions were suitable for racing. Several drivers complained of aquaplaning, with Marcus Ericsson, Felipe Massa and Kimi Raikkonen all spinning into the barriers during the race.The conditions were some of the worse F1 has seen this season, but a number of drivers pointed to the extreme-wet tyres tendency to aquaplane.They are very easy to aquaplane with, its not like its raining a lot, Raikkonen said following his incident. Weve said that many times, but it obviously also depends on the circuit and many things.If I compare to ten/twelve year ago those tyres could cope with this kind of rain with no issues, no aquaplaning. The aquaplaning is the biggest issue, if we have a bit of standing water we get zero grip. Thats it.Romain Grosjean, who spun on his way to the grid, added: The extreme tyre is a very poor tyre and there is no grip. You have to take a huge amount of risk to go to the intermediates because they are just faster. But, yes you cannot control the car in a straight line.Part of the problem has been a lack of wet weather tyre testing since Pirelli returned to the sport as the sole tyre supplier in 2011, but this year the Italian tyre company has completed six days of dedicated wet-weather testing to develop its 2017 tyre. Rosberg, who managed to catch a big slide when he aquaplaned on the uphill run to the pit straight in Brazil, hopes the dedicated wet-weather tests will produce better tyres.Its difficult because its completely unpredictable when you go through a little bit more water -- you dont know whats going to happen, he said. That makes it really challenging, but they [Pirelli] know that and they are working on it at the moment.Thats why they have been doing wet tests, to make some progress for next year. It would be good for the racing also, because then you dont need to red flag it and you can let the race go on. It will be a good thing.Red Bull boss Christian Horner also hopes progress can be made ahead of 2017, when Pirelli faces an even tougher challenge with a wider footprint that will be more susceptible to aquaplaning.You could see that the drivers were having big issues with aquaplaning on the extreme and the inter. Kimi crashed in front of us on the extreme. [Marcus] Ericsson was on the inter. So we conducted some wet testing for Pirelli at the beginning of the year to try and help, and it seems like there is still room for improvement on the extreme in extreme conditions.However, Lewis Hamilton, who won the race in Brazil without a single mistake, said the conditions were not as bad as they looked.This is Formula One and the rain conditions are the trickiest conditions. If everyone just went round and didnt make mistakes it would be too easy and then everyone could do it. We are going at some serious speeds and there is a lot of water to disperse by the tyres and the tyre just struggles; the faster we go, the harder it is for the tyres. This wasnt a particularly difficult race in terms of being wet, theres been much much worse races in terms of aquaplaning. Custom Cubs Jersey China . 24 Baylor in a Big 12 clash between teams trending in opposite directions. 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