Wheel Sizes

[Trejster]

So I've not long purchased an Indium Grey T6 (T30) and have about a million questions about everything! I'm searching the forum trying to answer them but stuck on wheels at the moment.
I've decided I want to go for 18" Japan Racing rims (JR36), however there are 3 different options:
1 - 8.0" all round
2 - 8.0 front 9.0 back
3. 9.0 all round

What is the best option?!

Tyres wise I'm looking for an all season tyre, probably Nokian weatherproof 235/55/18. Will they fit ok with each of the above options? Brain very confused!

P.S Next question - spacers, will I need them?

 

[Fish]

There is a site called https://www.willtheyfit.com/ might help.

 

[DaveD]

I have Nokian WP 235/55/18 on 8 inch wide steel rims all round, I have a 4motion so it's important to keep front and rear the same, they look spot on. You won't need spacers on OE suspension, if you've lowered it then maybe.
Google is your friend, check out a few "equivalency tables" which will advise you on what tyre sizes fit on what rims.
Tyre equivalence: Car tyre tips - Pneus Online

 

[Trejster]

Thanks v much that tyre equivalence link helped. I guess my decision is whether to go all the same width or staggered.
To give some context the van is going in for camper conversion soon so will naturally lower slightly but do plan on lowering 40mm also

PS I dont have 4motion