Jarno Trulli believes Pirelli's Formula 1 tires are still lacking development, the Italian claiming this year's rubber is proving too inconsistent.
Pirelli is returning to F1 this year for the first time since 1991, and the company has stated several times that its tires have been designed to wear quickly enough for drivers to have to make two pit stops in each race. Trulli, however, reckons the tires are lacking balance.
"I think something is still missing in the development, because the tires aren't balanced yet," Trulli told Autosprint
. "I think this is the biggest problem to face at the moment. Pirelli says that this is what the FIA asked them to do, to have tires that wear quickly, but I don't think this is the problem.
"In my opinion, tire wear is secondary compared to the tire's balance problems, because at the moment you get on the track with a new tire that initially is understeering, and after three laps the behavior is the opposite – that is, impossible oversteering."
The Italian driver admitted he is also skeptical about the movable rear wing producing more passing this year.
"Are we sure there will be more overtaking, as many people say? I'd wait for the first races to really understand how everything works.
"I have no opinion yet simply because I haven't had the chance to test it all in race conditions yet. Let's wait for the first race, then we'll see whether it's a positive new thing, or if it's something we could have done without."
Trulli also reckons Formula 1's numerous changes in the rules are actually counterproductive, as they confuse the fans.
"I strongly believe that Formula 1 changes too often," he said. "My opinion is clear: there should be a discussion with all involved parties for one year, or even two if necessary, and then introduce a set of regulations that may well be revolutionary, but with many years of stability.
"Each change is a cost for the teams, and if the top teams can afford investments in the short term, too, for the other teams it's a financial drain. Another thing I want to highlight is that every change is a cost for the big audiences, the ones that watch on Sundays.
"A spectator can't always be chasing the changing regulations, like refueling, number of pit stops, F-duct and KERS. Can a spectator get passionate about KERS? People at home want to understand, and if we carry on changing the regulations every year we are just creating confusion."