Widest rims & tyres on AU ute?

[Mikal52]

Hi, I know this should maybe be in the tyre n wheel forum but its AU specific so I thought I'd put it here.

I'm looking at getting some 19's or possibly 20's for my ute and was wondering what are the maximum width I can run for both rim and tyres... I'd love to get a staggered set with 8.5 fronts and 9.5 rears... I just want to make sure they will fit. And what size tyres I should run on them?

Also my car is on SL front and rear. but will soon be going to SSL front SL rear with shortened shocks.

Thanks for ya help
Michael