Pit Bull Tires 1.0" Mad Dog Micro Crawler Tires with Foam Inserts. These optional tires are intended for use on 1/24 and 1/18 micro crawlers. This set of tires was designed to have amazing 1:1 scale detail to match the original full-sized Mad Dog tires. Not only do they mirror the aggressive tread design of the original tire, but you can also expect the same high-traction performance with the super-sticky Alien Kompound™ that they are molded from. This combination makes these tires a great choice for any micro crawler equipped with one-inch wheels.