I have a 2008 Dodge dually I have a 4.5" fabtech lift with a 2" spacer so a total of 6.5" lift I have the 2" wheel spacers between the duals and I am wondering how big of tire I can go with cause my truck looks funny right now with 31" tires on it I am pretty sure that a 37" tire would be perfect but the width is the issue cause the inside dually tire is still about a half inch from the springs and I cant find any tires skinnier than 12.50" any help or advice would be great thanks

 

37 will be the biggest stay with 11.50 or under on width in back to fit. super swamper makes narrow widths but they wear fast

 

305/85R16 Buckshots, 10.5 wide, 36.5 tall, load range "E"
Cost me $242 each, plus shipping, got them on my dually, great mud/snow/wet grass/wet road tires, but (learned the hard way!!) they dig in real quick in soft sand/gravel
2" spacers are about right, I got 3" (I was going to put on 12.5's) and they are too wide with these

 

my buddy has 305/75/R17's on his Dodge dually with 3 inch spacers in the rear the tires have more than enough room.