Snow Tires on 18's

[mylamb]

Hello -

I have a quick question regarding snow tires. The 2001 Boxster S is my first car that requires swapping out rubber for the winter. I have 18 in. Sport Classics and even though it is recommended that I get a set of 17 in. rims, I would prefer to save the money. My OEM size is 225/40/18 up front & 265/35/18 at the rear. Pirelli makes a set in this size called the 240 SnowSport & Continental makes a winter set too. Even though the size is right, it seems a little wide for snow tires. If I downsize the width, like 205 or 215 at the front & 255 or 245 at the rear, will they still fit my rims? Wouldn't that narrower size be much better for the winter? We just had a snowstorm here in Chicago, and now it's freezing! Have to get this done pronto.

Thanks.