http://www.digginter.com/Shopping/continental-ultra-gator-skin-wire-bead-road-bike-tire/ Conceived as a high mileage tire with excellent floor protection. Many refer to as Ultra Gator Skin "bulletproof." A Duraskin layer and an extra layer of Kevlar in the tread sticking to a maximum protection. Low rolling resistance tread design highlights the wet and dry. 280 grams - 23 mm wire bead, 300 grams - 25 mm wire bead, 320 grams - 28 mm wire bead, 350 grams - 26 ", 340 gram Thu, 24 Dec 2009 22:16:01 CST en