Winter tyres f**king up handling

[oddball1973]

Got Pirelli Soto I's on the front (tyres are one year old and fitted them for the second year running) and had New Pirelli Soto III's fitted to the rear as the Original Soto 1 rears didn't fit (changed from 991S to 991 50th and the rear wheels are a different size)

Handling has gone to st (talking at 30mph plus) - car feels like its on wet mud, no feel, cambers in the road pulling it all over the place etc. Going back to the tyre fitters tomorrow but any ideas out there ?( Checked they've been fitted right in terms of rotation direction and they're all correct, Ican't believe there's a compatibility issue between I's and III's on paper but can't think what else it could be, the Soto I's front and rear on the previous car felt fine)

[oddball1973]

done about 150 miles so far I'd guess, cant remember them feeling this bad on the previous 991 though

[oddball1973]

its a few degrees above their ideal baseline which I believe is 7 but no way am driving on them aggressively, car and hedge would seem a likely outcome the way they are at the moment. I guess see how they behave after a week or two.

[oddball1973]

They are exactly the same size and profile as the summer Pirelli PZeros so nothing to do with speedo/wheel rotational speed computer issues

[oddball1973]

I'll check sizes in the morning, surely the winter tyre should be the same size as the summer tyre though?

[oddball1973]

Thinking its the directional Sotto3's on the back not working with the Assymetrical Sotto1's on the front, my tyre guy is speaking to Pirelli Technical at the moment

Edited by oddball1973 on Monday 22 December 15:36

[oddball1973]

problem sorted, rear directional tyres and front asymmetric fk your cars handling right up. Asymetrics front and rear and now drives fine

[oddball1973]

Coming down in spade fulls here in Rutland, might have a little venture out..... In the wife's Evoque

[oddball1973]

Hi we got it sorted, it was the mix of directional rears and asymmetric fronts that was causing the car to feel like it was driving on wet mud (the traction light was coming on over 40mph)

Soon as asymetrics all round were fitted everything was fine. I think its worth bearing in mind SOTO I's and III's don't mix (I think the same would happen in any other cat not just a Porsche to be honest