Being a car-based crossover SUV, the Mariner should do fine with premium all-season passenger tires. Note that the Mariner left the factory with either 225/65R17 100T or 235/70R16 104T tires, so be sure of the correct size when you order. When it’s time to shop 2011 Mercury Mariner tires, some of our recommendations would include the Yokohama Geolandar CV G058, Bridgestone Weatherpeak (75k mile treadwear warranty), Michelin Defender LTX M/S (70k mile warranty), and Dunlop Grandtrek AT20 These are all tires that’ll deliver the long wear, great road manners, quiet, comfortable ride and year-round traction you want!