Tough enough for the meanest streets - Durable enough for urban assault, park riding, commuting, cargo bikes, etc. - Grooved slick tread design - Wrap-around tread pattern As the original urban assault tire, we designed the Hookworm to take the abuses of the most aggressive street riders. Bead-to-bead tread provides durability and traction whether you're dropping staircases, grinding rails, or riding in your local skate park.