I'm coming up for a tyre change. What options do I have (if any) ? My UK spec runs P245/45 R20's all the way round.

I know the US models run different sizes front and back - not sure if they have the same rims as the UK spec.

Any UK owner looked into this ?

If I could put a different size on what benefit would this have (better handling/ride etc.)

I've always thought the rear tyres looked a tad small.

I have an export model too... ours are only 8"wheels compared to 9"and 10" for the US spec'd wheels...

I'm actually stuck because Saudi doesn't carry Pirelli's this size at all. The only thing close is a 275/40/20 for a bmw X5. No run flats..... I'm seriously thinking of buying a full set of wheels in the states for everyday driving and then a track set....