heyy i have a 94 jimmy, i currently have 16 inch chrome rims on it..i was looking to upgrade to 20 inch rims soon. Do i have to do anything to my truck or will 20s just fit right on without hitting anything?

 

Its not the size of the rim you need to be concerned with, its the outside diameter of the tire that makes a difference. Watch the backspacing too.

 

exactly, 2wd and 4x4 rims have different backspasings and offsets. anything from about a 30mm and up offset would be good for a 4x4. anything under that is for 2wd's. keep that i mind before you just go out and buy any rim.