Check some past threads on this site...I have the 18' rims with "Nittos" but the errrr "hole"(wheel well) is same on all of our cars so you'll have the same demension issues regarding clearence. AS alluded to by others the 285X60X18 is pretty near the max without lifting/slicing the cladding more than a little/jacking the torsion bars etc . Inasmuch, as you have 16inch rims this dynamic of tire size changes.

A suggestion is, if nobody else helps you is to visit an online tire site that computes wheel diameter and section width, use the 285x60x18 measurements and reduce that measurement to inches( I think for the Nittos I have are around 32 O.D. and 10.75 width..if I recall but wont swear by so check it out for yourself.) Now check Nitto or whoever you prefer and cross match to those demensions using a 16 inch rim....one other thought is the rim offset on your 16's might be different that the 18's I have....I kinda doubt it but I'm sure there is some VX Maven out there who knows. Also you may hear that this rim may be too narrow for the tire of your choice. Personally, I have not had any problems with this such... as uneven tire wear, nibbling, instability etc. If anything its more stable and I like the idea of having that rim sucked in a little more and out of curbs and rocks way.

Good Luck