The Jumbo Jim is manufactured from the same materials that are also used to create the fast-rolling Schwalbe mountain bike tires. This means the Jumbo Jim uses a 127 TPI folding casing with tubeless-ready beads and the well known Schwalbe PaceStar compound. The tread pattern looks like it can handle a wide range of conditions with the relatively low, wide spaced center knobs and huge shoulder knobs that should provide plenty of cornering grip