The 308 has P225/50R15 tires on it. BUMMER - no tires available in Canada. I can have tires ordered from the US @ 479.oo per tire.. I am having P225/60R15s installed on the rear until I can find a good set of 4 @ a good price. The car will sit a bit wonky as the 60s are about one inch taller ~2 inch larger diameter. There seems to be lots of room for them in the wheel well.
