Mongrel

I have seen 3 of these rolled over in my life...and they were all in US Mail livery...actually all had mail spilling out of them too! Careful. I would say get the widest tires you can fit on them.
Fabbing up a full cage, boxing the frame, and was already thinking some rubber. Plain steelies, 15 x 7s on the rear, 15 x 6.5 on the front.