biggest tires on back of dually
 

I have a 2000 chevy 3500 and im gettin new tires soon. Whats the biggest i can go on the back without rubbing when im towing. It has the stock size 215 85 16 on it now. Could i fit 235 85 16? Or bigger?

try this site out here to get an idea Tire size calculator

I need to know how much wider they are that tells me everything but width. Thanks though

If you look a little closer it will give the widths on the old size verses the new size

I dont see it

you will be looking a about a 1 1/2 closer together on the rear tires you will want to run load range E or better to keep them from touching when loaded a 235/85/16 will be.0.787 wider than a 215/85/16

Ford uses 235-85-16 you should be good