Exaggerated file style tread with an overall round profile and larger shoulder knobs is perfect for CX and gravel use Low rolling resistance thanks to the ramped knobs pairs well with the larger staggered shoulder lugs for improved corning grip K-Guard, kevlar infused puncture protection belt resists puncture from thorns and road or trail debris Standard 700x38 622 Wire Belted Bk/Bsk 65 550 50 NoUPC/EAN/GTIN: 4026495822947