Mine has 10.00-20s on it. They are pretty tall and fill up the wheel-wells nicely. I also like the stopping power and ease of service of the air brakes.
I would be ok with 6 mpg, 7 would be better, and 8 is probably just wishful thinking. My new Dodge dually gets around 10 mpg pulling my GN trailer at 20-25K lbs. but I'd rather use the old GMC. Around here the .40 to .50 cent per gallon price difference between diesel and gasoline is shrinking quickly and gas is running about $3.70 or so a gallon so 5 mpg might get expensive on the longer trips.
Last edited by LocomotiveBreath; 02/27/2013 11:24 PM.
