For wider tires that won't rub and are damn near the same O.D. as OEM (29.5" O.D.)-- choose the tire size of 285/55R18 (30" O.D.). There are only a few brands available in this unique size and they are unlikely to require any trimming of the cladding if fitted onto the OEM 18x7 rim.
http://www.onlinetires.com/user/vehi...allbrands.html
Probably your best bet is the MAXXIS - MA-S1 MARAUDER in 285/55R18 and it is priced right!!! Don't waste your money on the standard OEM size when you can have essentially the same O.D. which won't effect your speedometer and in a much wider tire giving your VX a much more meaner look and much better handling.
Again, the 285/55R18 (30" O.D.) should be bolt-on perfect without any cladding trim whatsoever if mounted on the OEM 18x7 rim.
http://www.maxxis.com/AutomobileLigh...-Marauder.aspx