Continental have over 100 years of experience in developing and producing bicycle tyres. The high quality Cross 28 Inner Tube features a 42mm Presta valve and a larger volume than standard 700c tubes, so it\'s ideal for touring, cross or commuting. - A.D. Key Features: Larger volume than standard 700c tubes making it ideal for cross, touring or commuting Valve: 42mm Presta Dimensions: 700 x 32/47 (32/47-622) Application: cross, touring or commuting Material: Butyl