These are the JConcepts Pin Swag 2.2" Pre-Mounted 4WD Front Buggy Carpet Tires. The JConcepts Pin Swag 2.2" 4wd slim front tires are designed to combine the outer lugs of the JConcepts Swagger front tire with a dense arrangement of pins. The Swag is split down the center to give a little individual control to contort to surfaces. In between, a stagger section with an angular front is placed just behind a vertical rib to complete the design. The tight spacing of the Pin and Swag bite together and minimize wear across the carcass.