Nico Rosberg was bemused by a problem with his tyres in Q3 which left him struggling for rear grip.
Rosberg and team mate Lewis Hamilton were separated by hundredths of a second or less in Q2 and Q2, but when it came to the top ten shoot-out Rosberg ended up over three-tenths of a second behind his team mate.
“I was really on a roll,” said Rosberg afterwards, “I was feeling good, and the end just didn’t come together at all.”
“Just struggling with grip and this and that. It didn’t work out and we need to analyse now what it was. I had less rear grip on the first set, especially, because it was a good lap but didn’t go much quicker than that so that’s disappointing.”
Rosberg’s radio messages after his first run in Q3 revealed his team had some indication his first set of tyres in the session would be “poor”:
|Q3||Nico Rosberg||Tony Ross||I didn’t have grip on the rear. No grip on the rear.|
|Q3||Tony Ross||Nico Rosberg||OK copy that Nico. That was the worst tyre set for you in the former two. So we expect the next set to be much better.|
|Q3||Nico Rosberg||Tony Ross||So what do you think on front flap?|
|Q3||Tony Ross||Nico Rosberg||I would say where we are at the moment is still good.|
|Q3||Nico Rosberg||Tony Ross||Yeah but I have too much oversteer. We think we just go with it, hope the tyres get better, or what?|
|Q3||Tony Ross||Nico Rosberg||Affirm at the moment, Nico.|
Although Mercedes expected Rosberg’s second set of tyres would be better, he was unable to improve on his time of 1’14.702 from the first run.
Rosberg questioned why there was an apparent difference in the performance of new sets of the same super-soft compound – but that was a conversation the team preferred to have off-air:
|Q3||Nico Rosberg||Tony Ross||What a rubbish end of the qualifying.|
|Q3||Tony Ross||Nico Rosberg||Copy that, Nico, copy that.|
|Q3||Nico Rosberg||Tony Ross||Why – how do you know which set is bad and which set is good? I mean… OK, we discuss it afterwards.|
|Q3||Tony Ross||Nico Rosberg||Yeah that’s the best thing to do, Nico.|
2015 Canadian Grand Prix
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