The Grand Prix 4000 uses activated silica compound that improves the handling at stability limits and gives great rolling resistance. The anti-tear formula in the rubber compound prevents tread brittleness while increasing mileage performance. Uses Vectran fiber which is extremely resistant to cuts and tearsSymmetrical tread pattern, shifted to shoulder of tire for increased tractionUses updated Activated Silica Compound (ASC) for improved handling in extreme conditions and lower rolling resistanceItem SpecificationsWeight205gPSI110-120PSITire BeadFoldingISO Diameter622 / road / 29"ISO Width23mmColor Tread/SideSilver/BlackTire TypeClincherTire Diameter700cTire UseRoad