The parent of balloon style tires offers low rolling resistance and a supple air cushioned ride K-Guard offers entry level puncture protection by utilizing a rubber belt with kevlar fiber reinforcement Twin Skin - An additional rubber coating on the side protects against cuts and allows for uniform coloring Standard 26x2.15 559 Wire Belted Bk/Bsk/Ref 70 840 50 YesUPC/EAN/GTIN: 4026495673914