tire size

is 225 40 zr 18 a good size ? I have no idea what size tires to get but my buddy is telling me i need those.

actually you want to get the closest you can to the stock diameter to keep the speedo close to stock as possible, so you would want 245/40/18


http://www.daveblack.net/asp/TirePlusSizing.asp is a good site to read about tire sizes.

thanks for the link man, now i understand all that crap =)