The Strada is Challenge’s go to tire for long days on the road. This all-condition tire combines a round profile that takes the sting out of rough pavement with a construction that provides maximum control and low rolling resistance. This tire takes tubeless to a higher performance level by combining TLR’s properties with a handmade construction for the ultimate in traction and ride quality. This tire includes PPS, a Puncture Protection System placed between the tread and casing to increase resistance to punctures. And puncture protection is enhanced when combined with the appropriate tubeless sealant. 300TPI SuperPoly casing.