The Super Swamper Radial TSL/SSR, better known as the SSR, is the second generation of the Super Swamper Radial/TSL and incorporates a slightly tighter version of the distinctive Super Swamper TSL chevron tread pattern, siping for wet pavement traction and icy conditions, greater sidewall protection with and a unique side-wall design for added traction and is quieter running. TSL (three-stage lug) is a massive short, intermediate and long lug pattern with each lug uniquely arranged, proportioned and spaced to allow them to bite quickly and self-clean rapidly.