Tyre sizes for GU

You can fit 36inch swampers on if you like with that lift.

but legally you can only go 15mm bigger than OEM

have a search, its been asked a few thousand times

A 305*75 will fit fine with the landcruiser offset which I think is the -13?? You need to remove your front mud flaps as the tyres will rub when you turn!! On the same rim you could fit a JT in 34*10.5 without any prob.

Leroy

ROH do an "export only" zero offset rim which will make 315/75/16s fit better. You also need to lower the bump stops 25mm to stop them rubbing at full articulation.

Their standard size is 265/70 16 which is just under 31"

I have changed mine to 265/75 16 which brings it to 32"

That is sitting on the legal limit as ADR only allows you a 15mm increase in overall diameter.

Most people however will run 285/75 16. i know 285 will just rub at max travel. Most cops and DOT will leave 285's as it looks normal for a 2" lift. Depends who you get. My brother is a cop and i know some are pri*ks and go through your truck.

i personally can't justify the cost of 285's compared to 265 and a 1/2" rise in clearance.

It also means more power running 265's as i'm pushing a smaller diameter. Heaps in rough or tricky terrain when i need every ounce of juice.