Had this problem first in January 2016, has never gone away. The pattern has changed since the cold start recall software patch, instead of happening immediately the problem occurs ~5 minutes after the car is turned on when the temperature gauge starts to move.
In cold weather (has done this...
Firstly, this issue cannot possibly be explained by tyres.
I've owned the car since 2012 (MY00, 290,000km). The speedometer always read about 2% higher than actual speed, which is normal in Australia. I regularly swap between two sets of rims for summer/winter which, while not identically...