The Roubaix Armadillo Elite is an endurance road tire that Specialized made all the more durable with Armadillo Elite puncture protection. Its center is as slick as any competitive road tire, except a unique bead-to-bead casing constructs even better flat protection. The 25mm casing smoothens your ride while 23mm tread allows for low-rolling resistance. Specialized added shoulder sipes to increase surface adaptation and grip, and Gripton rubber grips whether the surface is dry or wet.