Michelin 4x4 Diamaris Tires are on sale plus free shipping! The 4x4 Diamaris is Michelin's Street/Sport Truck Summer tire that provides their highest level of wet and dry traction for luxury sport utility vehicles. Used as original equipment on the BMW X5 4.6is, Porsche Cayenne S and Cayenne Turbo, the 4x4 Diamaris is also available in the large rim diameter sizes appropriate for other light trucks.