Whether you choose to use it front and back or mated to a more aggressive front tire, the Cyclocross Jet semi slick tire is just the ticket for getting more speed out of your 'cross bike. It features the same extra supple 127 TPI casing material as we use on our professional road tires for exceptional road or trail feel, and our now legendary low profile Silica Energy tread with aggresssivley chiseled shoulder knobs. You get a refined balance of straightline efficiency when you just want to roll fast, and traction when you need it most diving through corners or climbing out of ruts. Super fast proven semi slick chevron tread pattern with aggressive shoulder knobs for cornering traction and stability. ESC extra supple casing for flexibility, performance and lightweight. ESC extra supple casing for flexibility, performance and lightweight. Silica Energy tread compound for efficiency and mud shedding.