235/40R18, 275/35R18. These are on a 2003 Boxster with 8"/10" rims. I ordered some other tires better suited to the seasons and conditions where I live (Wyoming) and I would love to sell these. They are great tires with only 3,000 miles on them, in perfect condition. $600 + S&H. I'll take pics if anyone is interested in buying them.