The Pirelli PZero Nero All Season tires in size 245/40R18 are all season tires designed to provide excellent wet and dry traction, along with a comfortable ride. They feature an asymmetric tread pattern that helps to improve cornering stability and reduce noise. The tires also feature a silica-enriched tread compound that helps to improve wet traction and reduce rolling resistance. They are rated for speeds up to 186 mph and have an H speed rating.