I want to put 20" Weld Racing 4x4 Rims on my Ram with big all-terrain tires. Not sure what size tires I should use, can someone help me out here?

I want something like this! :biggrin:

http://streetdreams.org/photo/data/509/1DSCF0006-med.jpg

The Ram 2500 requires an E load rated tire. You're not going to find anything in that size range with a firm enough sidewall or high enough load rating to work safely. None of the vendors we work with make 20" tires with a 119 load rating (which is the minimum required for the truck). If you look at a 20" make sure it is at least a 119 load rating. If the shop has no idea what you are talking about when you ask them that, they either don't know what they are doing, or they are more interested in your wallet than your safety.

If you want tires that size, those are somewhere around 37x12.50. There are plenty of tires and wheels out there that are strong enough. Those Interco's pictured above would have plenty of sidewall strength, unless you plan on taking a 90 degree corner at around 200mph on the pavement!!

The wheels you pictures are nearly 40 inches in height. How much towing/hauling do you do with your truck? If you are dead set are running that one wheel and tire combo, you will need a suspension lift. Nitto and Toyo (Tirerack carries neither) offer all terrain tires in 20 inch sizes. BF Goddrich is also coming out the All Terrain TKO in a 20 inch size at some point in the future. Do you intend to lift the truck at all? :smile: