Product Description This Light version is thinner than the standard Race 28 tube so keeping them inflated to the correct pressure will help prevent the risk of pinch flats Unsurprisingly it also saves you rotational weight, helping to increase your speed that little bit extra. Specifications FeaturesFeatures40mm Schrader valve700 x 28-47c BrandContinental SportBicycling Assembled Product Dimensions (L x W x H)2.50 x 3.50 x 5.00 Inches