I have a new 2006 lariat with the 20 inch tires I need something more aggresive(mud and snow) but I was hoping to not have to buy new rims. I dont see many tires available in the factory size 275/55/r20. Any help?

First time ford truck owner

 

BFG makes an All-Terrain isn 285/55/20, and Nitto makes a Terra Grappler A/T in 305/50/20. Those should both work nicely.

 

Right, the BFG 285/55-20 is basically a 33x11.50 tire and the 305/50-20 is a 32x12.50 tire. You could also use a 305/55-20 (33x12.50), if your truck is a 4x4. Look at the Toyo Open Country AT also, as well as the Pro Comp Xtreme AT and the Mickey Thompson Baja Radial ATZ.