Has anyone fitted these? If so advice on size, diameter and width please

Hello David

 

Wheel spacers are not, imho, a worthwhile modification.

Among many effects they alter the wheel bearing loadings

You may also find your Insurance company will not be too keen either.

 

There are models on the internet, usually operated by wheel and tyre resellers, that allow you to 'play' with the parameters.

Offset, and rolling radius are quite important.

 

Most important, perhaps, is to understand any changes to wheel to chassis clearances. Vital for Safety

Cheers Rojie.