Challenge Tire Gravine XP Tire 700 x 45 BlackDesigned for improved performance and traction across muddy sections and on more rugged, rocky terrains Featuring a more aggressive tread pattern, this tire pushes the boundaries of gravel further Xtra Protection (XP) for more endurance rides on rougher terrains with CORAZZA ARMOR SILVER and GOLD TECH SPECS model Gravine XP size 700c width 45mm compound bead folding type tubeless color black weight