Not relevant. I read somewhere that the minimum is counted from the dealers' optional package.. So say with sportivo based line model, 16s, dealers offer 18s with extra $$. Then 18 it is. That is correct however it must be stated on the placard. You can go 26mm wider over the largest dealer fitted options but it must be stated what the options are on the placard. Without requiring engineer certificate. Eg. The Is250 Prestige has stock 16s but on the placard it states 16x7s, 17x8s, and 18x8, 18x8.5s are fittable to the car. So technically an Is250 owner can fit max 9.5in wide wheels, and not more than 19 inch in diameter (actually it's suppose to be up to 15mm which is only 18.6 inch but that is not possible). http://www.rta.nsw.g.../vsi09_rev4.pdf I don't have an Ateva so i don't don't know what the placard reads but on the Sportivo it only has 17s stated. I doubt it states 16, 17 ad 18s on the Ateva. Double checking Sportivo ....