Goodyear Eagle GTII's. These things are huuge, but I can go fast now if I want and the truck handles better too. No rubbing as of yet, even at full lock. I didn't think my hemi was going to spin them (how wrong I was...).

 

How about 35X12.5X20 or 315/60R20. Too much?

 

315's might be pushing it, at least up front, I imagine in the back it won't be such a big deal.

 

1010tires.com has a good tire size calculator which comes in handy when figuring out how a different tire size will effect your speedometer.

http://1010tires.com/TireSizeCalculator.asp

 

Thats where I got it from, the numbers that is.

 

275 55 20 is 31.9 inches tall on average the 305 50 20 is 32.0 inches tall on average

 

I know if I put a 15 inch rim a 33 12.50 will fit clear with no problems, but I would like to put a 2.5 inch level kit on the front and keep my 20 inch rims what would be the biggest I could go without lifting the truck up. if anyone could help I found some I like but any ideas would be great.

 

You cannot put a 15" wheel on the Ram, 17" is the smallest. Now as for the biggest tire with out a lift or level is dependant on your taste. I would suggest a 295/60/20 for that that is a 34" tire you could fit a 295/65 series which would be a 35.5", but may look stuffed.

I personally run a toyo at2 295/65/20 with a 2.75" pro-comp leveling shock in the front and a 1.5" lift spring in the back with fox 2.0 shocks.