It seems that these are simply a substitute for the originals that came with the car. I don't think they provide the best grip when it's cold. In the rain or frost, they seem to spin a bit too fast on take off, and sometimes even in second gear (I could be pushing the pedal too hard). I worry about how they will perform in the snow though. Apart from that, the car drives well in the wet, my fuel consumption has not increased, and the road noise is the same. Considering the price, I will leave things like this for the time being.