Kimi Raikkonen says that Lotus needs to get heat into the tyres more quickly following practice for the Canadian Grand Prix.
Raikkonen was eleventh in second practice and conceded that the day wasn't ideal.
"We improved the car through the day and by the end of the session it was ok; not ideal but certainly not a disaster either. It wasn’t easy to get the tyres up to temperature today, but it’s pretty cold at the circuit so that’s not too much of a surprise," he said.
"If we can get the tyres working better it will be an improvement for sure, but it’s not going to change the world. We’ll be looking at how to get them a bit warmer for qualifying tomorrow and then see what the weather does. After that, we’ll do the best we can."
Romain Grosjean, who will take a 10 place grid penalty into the race, also struggled with tyre temperatures.
"It’s quite hard to get the tyres switched on in these conditions as the surface here is very smooth, so with low temperatures it’s a bit more tricky to build up the energy in the rubber; more so with the mediums but even with the super softs," he said.