Nico Hulkenberg reckons that the Sauber C32 is stronger on the option tyre than the prime tyre.
Hulkenberg was fourteenth fastest during second practice, ahead of the Singapore Grand Prix.
“During FP1 we struggled a bit with the set-up of the car and couldn’t really find a good rhythm,” said Hulkenberg.
“This afternoon was much better,” he said, referring to the second of Friday’s practice sessions.
“I felt a lot more confident in the car. However, there is still room for improvement, especially on the option tyre. I think we can find quite a bit more in the lap time. Overall it was quite interesting that the harder tyre was quite weak for me during the long run, and the option performed a lot better. In that regard we still have a lot of work ahead of us.”
Team-mate Esteban Gutierrez was sixteenth quickest and admits that tyre wear is a concern.
“It was an okay Friday,” said the Mexican.
“We managed to get in some good laps and we were able to get through some things that we were planning to do in order to improve qualifying. My experience is improving, but I need to work on certain things.”
“We worked on the set-up of the car. The long runs look okay. There is a lot of thermal degradation on the tyres, which will be quite a challenge during the race. This is something we need to look into to try to find the right compromise for qualifying and a good race pace.”