Most people with 16" wheels probably get them in conjunction with the lower riding Sports Suspension Plus. Even so, looking at the US specs for the Cooper and 'S', the 'S' (16" and SS+) still rides about 6-7mm higher than the Cooper (15" and SS). But then the 16" wheels are 1" wider than the 15" wheels and you can probably fit them with 205/50-16 tires.