16s will not fit because of front calipers.
5th gen are 18x7.5 +55mm offset and way sunk in. 4th gen LGT rims are 17x7 +55mm offset and way sunk in.
Now, listen up. 3.6R rims are 17x7.5 and are +48 offset; not as sunk in...
Tire rack now has 17" steelies.