Continental ultra gatorskin 700 x 23c black duraskin folding tyre with free tube to fit this tyre brgthigh mileage durable and fast rolling tyreduraskin polyamide mesh layer fabric on sidewalls protects the casing against cuts punctures and abrasion180 thread per inch casing with kevlar reinforced layer directly under the tread resists punctures and adds to longevity of tyreslick tread for exceptional grip in wet and dry conditionssupple handling and low rolling resistance