SPOBIT 28 700x35-43C F-V 48mm Road-Mountain Bike Replacement Inner Tubes Presta Valve 48mm with Cap with Tire Size of 700c x 35 38 40 and 43 Bike Tu

Product features? Durable butyl rubber, Better air tightness and a shock absortion and Easy to use. Specification? Valve Type: Presta Valve Valve Length: 48mm Size: 700x35/43C Package Included: 4 x Bike Tubes Warnning Tips: 1.Please kindly confirm the size of your bike tire before you buy, width between 1.75-2.125 tire. To determine the size you need to check the side wall markings on your tire where you’ll see two numbers separated by an 'X'. The first number refers to the tire’s diameter. The second number refers to the tires width. Select the tube that has the exact same diameter as your tire. Your tires width should fall into the range of widths listed on the tube packaging. 2.Before changing the tube, please check whether have some stones or sharp things that may broke the tube that stay in your tire. 3.During installation, the inner tube should be inflated a little (not too much), and then the inner tube should be installed, and make sure that the inner tube is completely placed in the outer tube. If the inner tube is sandwiched between the outer tube and the steel ring, it must not be inflated, otherwise the inner tube will explode. 4.After installation, fill a little air first to ensure that the inner tube is completely installed in the outer tube, and then fill it with air at one time. Don't inflate it too full, so as not to blow out the tire.