Michelin Primacy MXM4 Touring Radial Tire - 235/40R18 91H Sunflower oil additive in tread compound helps provide increased traction at low temperatures for enhanced braking and handling in wet conditions and better overall performance in snow. The MICHELIN Primacy MXM4 tire continues a tradition of meeting the demanding standards of the worlds leading luxury car makers. Tread design with MaxTouch Construction for even tread wear and numerous biting edges for all-season grip combine to deliver many miles of driving pleasure.