F1: Haas unsure how to solve tire troubles

Romain Grosjean says his Haas Formula 1 team does not know how to fix its problems with getting the tires switched on in cooler conditions.

The Frenchman finished 14th in the Canadian Grand Prix, one place behind teammate Esteban Gutierrez, with both drivers admitting it was difficult to get temperature into the tires throughout the race.

"When the virtual safety car came out, we lost the temperature of the tires and that is our struggle," Grosjean said. "On a hot track with high roughness like in Bahrain, we were good as we were working the tires nicely but on a smooth track, we're struggling.

"We don't know what to do but we know where we need to look so that is a positive. We made some good changes this weekend and everything was better. Now we just need to get the tires to work and once we get that, the car is going to be great.

"We're moving forward, – it's not shown on results but we're clearly doing the right thing."

Gutierrez added: "I was struggling a lot to get the tires to work and then at the end of every stint it was difficult to keep the temperature in them. Once you start losing that the car starts to slide and it's like driving on ice."

Grosjean admitted it may take time to get on top of the problem, referencing the issues Mercedes had with tire performance in the early years of its current works program.

"Look at Mercedes, at how long they struggled," he said. "In qualifying they were really good and in the race they were nowhere in 2011, 2012, 2013. So it took them around three years to understand why they were good in qualifying and not so good in the race.

"We are the opposite and we need to hope for the summer to come, first of all, and then try to find more tools to get a better understanding of tires."

Originally on Autosport.com