I bought a set of genuine18" Jaguar wheels off e bay for my 3l V6 s type (2001) to replace my 16" wheels. Does anyone know the best tyre sizes for these wheels ?
I think they're 8j width.

 

I have a set of wheels and tyres which are about 3.5K miles old, I must get round to selling them and they came with -
Pirelli P Zero Rosso 245/40 ZR 18 97Y
You can also use an on line tyre calculator and by entering your old tyre size and then altering the wheel size it will give you the options available. I'm at work just now and do not have quick access to a saved site but I'm sure you willfind one yourself.
Hope this helps.

 

Got one on mytyres.co.uk Cheers