This is the Continental GP Attack Force Front and Rear Folding Road Tyre Set. Based on the famous GP4000S, with small tweaks to benefit road racers. Continental s Black Chili and Vectran technologies are radically applied to this uncompromised race tyre set. Each tyre has been specially designed and engineered for either the front or rear. The GP Attack (front) uses their Black Chili compound, providing this 22mm tyre with the ultimate grip and reduced rolling resistance. The GP Force is specially designed for the rear. Its 24mm profile and Black Chili compound that gives this tyre the traction and handling that is second to none. Both tyres are made with Vectran puncture protection, a protective belt of super strong and extremely lightweight material beneath the bead. Wear levels can be easily monitored via indicators in the tread, details that show professionals are at work!