i work as a service advisor at a suzuki dealer and just last week i put 19" chrome spinouts from
PERFECTLYROUND.COM on an '07 forenza, tire rub when doina u-turn was minimal but expected with that size tire and that small of a wheel well. i've seen 20"s on a forenza i wouldnt suggest it. When putting rims on veh's that are larger then what comes stock on it technically you void the manufacturer power-train warranty, if u like the look of 15-16 inch rims then i would go with that, otherwise keep your stock wheels and tires in case you have and powertrain related problems. Just a friendly hint from someone that knows
