I am currently trying to source some new rims for the little beast, and was wondering if anyone knows what the largest width / offset I can have on the thing? I think only 15's or 16's so diameter is not really a problem.
The biggest you can go without much trouble is about 14x5.5 or 14x6
I've got a set of 14x6's waiting to go on my mightyboy but i'll need to do some mods to fit them.
The quickest and easiest is 13x5.5, they're easy to find and pretty cheap (because everyone is going really big now) and with the right tyre choice they won't throw your speedo out too much.
For more info check out The Australian Mightyboy Owners Network - Home
Hope it helps,