Outer Limits 4x4 Board

Can anyone tell me what the largest stock tyre size was for a GQ?
I see alot of Patrols on 33's are they all engineered?

Hi bud to the best of my knowledge standard GQ's all came with 31's but I was told (only rumour) that they did do a 33 as an optional extra but before any one shoots me down it was only hear say hope this helps.

7.50X16