20" wheels on uk explorer

hi guys i have just bought a 98' uk explorer.will 20" wheels fit if so what offset and width wheel do i need and what size tires do i need.
any help would be great.

 

[draft]

20x8.5 or 20x9

offset depends, the less the offset the more it sticks out, the more it sticks in
+15 = pretty neutral over the fenders
+35 = almost stock, sunk inside the fenders

275/45/20s will work fine, or if you want low pros, 255/35/20s

 

[PAUL NEWMAN 200]

thanks