37x12.5x17 help with decission

[timgco]

....pics of my old truck

Try to stay with a 12.50 wide tire. 13.50 wil rub more on your swaybars and will have a better chance of taking out your rear airbag sensor (if you have air susp). I have wheeled a couple trucks with 37's/ pushed them hard. One truck had air susp. the other did not. The air. susp. truck, I hit the sensor due to a failed swaybar link (allowed more flex) and blew out teh bag. There is an air sensor mod you can do that works to solve that issue as well. ...not a bad idea to do anyhow.

37 12.50 17 BFG MT's on stock wheels