Hi Everyone

Wondering if anyone could help me with some advise, im getting a set of Focus RS style multi spoke alloys (the ones off the focus that looks like the rally car) for my transit connect 220 SWB.

I know they will fit fine and i will need tyres 225/40 R18 with no scrubbing but was wondering what rating i will need.....91/92/93?

I will not be loading it up with tools for work but am looking to making it my new project and will be doing mostly motorway driving.

any advise would be helpful