How big can i go on 15's at standard height

[iliketwopointeights]

Its for 93 4runner with wide split rim 15's, it has 31 /10.5 /15 at the moment but the are AT's and low on tread. I would like full on mud tyres but dont want to spend the earth

[stormforce]

the 31x10.50x15's are the biggest on a standard truck

[iliketwopointeights]

what would i have to do to fit 32X11.50X15 and does it matter if front and rear are different sizes

[RodLeach]

You'll want them all the same size.

Width isn't so important but if there different heights you'll be dragging around the two smaller tyres as they cant keep up. Cause all kinds of damage.

I ran the equivalent of 32x10.50. On stock height.

considering there going to be 1/2" each side thicker...

You could probably run them ok. Might need to tap any metal in that rubs.