Hybrid tire with reflective side stripe for all weather road conditions.. SC - Single compound casing for a durable dependable tire. MS - MaxxShield represents the pinnacle of flat protection with 2 layers of puncture resistant belting. K2 - Maxxis exclusive fabric that offers greater puncture protection than standard Kevlar without effecting ride quality. MXPR - MaxxProtect A poly-fiber material positioned between the tire tread and the casing designed to maximize puncture resistance in select hybrid models. KI - Kelvar Inside Kevlar belting beneath the tread. SS - SilkShield offers bead to bead puncture protection covering the tread as well as the sidewalls