Just wondering what size wheel / tyre size people have gone to on G20 vans.

My day van is coming along well now and will soon be up and running with lots of new parts.

But will be needing new wheels and the current set-up just does not look right, especially the rears!

 

They don't look too far off. That older style used 235 75 15's. I would use lt tires instead of passenger tires. Better sidewall.
Does your van not have the door placard on the drivers side stating tires size etc?

 

No - the door placard has gone.

I think I need to make sure the new wheels have more depth as the rears are looking rather lost with the body kit in effect extending the arch outwards.

 

Yes but those flares are on the outside of the wheel wells. Wider tires will rub esp on the fronts when turning.
Not too much you can do there....
What size tires are on there now?