This is the #1 tire choice for Tour Divide, the longest mountain bike race in the world stretching from Canada to Mexico along the Rockies. It features an elevated centerline that rolls effortlessly on hard surfaces, numerous micro knob working edges providing lateral traction and predictability, and a voluminous casing designed to go the distance.SG2 bead-to-bead puncture protection provides improved air retention, and offers 80% more sidewall protection vs traditional single-ply tiresTCS Light Fast-Rolling: Lightweight casing with TCS aramid bead and Dual Compound DNA rubber (60a center/50a sides)Long-lasting tire with a rounded profile and low rolling resistanceItem SpecificationsColorBlack/TanDefined ColorTanFlat ProtectionTread and SidewallISO Diameter622 / Road / 29"ISO Width (mm)40Labeled Size700 x 40Tire BeadFoldingTire Diameter700cTire Intended UseGravelTire TypeTubeless Ready ClincherTPI60 WTB Nano Tire Tires UPC: 714401110922