As an oregon guy who drove on summer tires in ptown about a decade ago, you really want to think about all seasons. Hydro planing for about 150 feet on 217 at 60 mph is less than fun. Did it again a week later on I5 outside of roseburg driving home for Christmas. Returned all my Christmas loot for cash and started a Les Schwabe account before the drive north. Now I run full studs late fall-spring and never have to worry about it.