i had a ZR2! This is where I got bit by the bug. I installed 235 75 15 or 16. It was a great truck but it was hard for me to drive long distances. we originally bought it for my wife 4'!!" and I am 6'3''. the seats were to small to sit in for long periods of time comfortably. We never had any problems ever. I don't think the rear gate would handle jerry cans unless you put the spare on the roof and make a mount to hold the cans on the gate. the sheet metal is thin on these and the full size spare is heavy