I blow right by them when I come on a semi they don't look in their mirrors and their blind spot is to big. I work for Goodyear recapping tire for 5 years 200 tires in a 8 hour shift from super singles to 14 inches tires and if the AZ rubber get any dirt on it the cap will under cure if it gets mount on a truck it will peel the cap right off to be under cure look for a glaze in the rubber on a recap. We use a pressure test they would blow its called a zipper rip scared the crap out of the hole shop.