Panaracer perfected the Gravelking SS 650b Tire to feature an all-new tread pattern that allows us to speed into corners and maintain absolute control through those tough and choppy gravel surfaces we love to cruise. This is a durable tire with a puncture-resistant belt, Panaracer's Zero Slip Grip compound, and a supple 126 TPI casing. The Gravelking SS's tread pattern is smooth with a diamond pattern center and more aggressive side lugs for smooth rolling and reliable control. We like it for everything from adventure rides on backroads and gravel paths to race days where we count on every advantage a tire could provide.