YunSCM 2 20 American style valve 20 bicycle mountain bike tube 20 tire tube 20 tire tube 20 bicycle tube 20 GGG39 pieces, 1.75 tube, 32mm, 2.125 tube,

✅【20x1.75-2.125 Bicycle Tube】: Applicable to 20”x1.75/1.95/2.0/2.1/2.125 bicycle, American style valve 32mm. 20 1.75 tube air intake has the same specifications as motorcycles and cars It was easy to inflate. Easy to use, no need for rubber. Suitable for mountain bikes, cross bikes, children's bikes, electric bikes. Note: Please check the tire size before purchasing. The tire size is usually indicated on the side of the outside tire. ✅ [Does not take up space and is convenient to carry]: 20 2.125 The tube has a small volume when folded, so you can carry it with you when you go out and run long distances, avoiding the awkward feeling of not being able to ride after the tube gets punctured. . ✅【High Quality Butyl Rubber】: The 20 1.95 tube made of this material can provide better airtightness and retain air for a long time, so you don't have to hit the air all the time. ✅【Budget Savings】: Doing it yourself will save your budget than going to the local store to replace your tires. As a spare bicycle tube, you can avoid the awkward feeling of not being able to ride after the tube bursts. ✅【Correct installation method】: First, push the tube into the rim to let a small amount (20%) of air into the tube. Next, install the tire, make sure the edges of the tire and rim are aligned and the tube is not pinched, and then re-inflate the tube to the correct air pressure. (If the tube and tire are not inflated together, i.e. if only the tube is inflated, or if the tube is pinched between the tire and the edge of the rim, air leaks and punctures may occur. Please note that it may become easier.) The bicycle is suitable for 20 inch wheels. Tire width is 1.75-2.125 inches. (Tires common to the 20x1.75-20x2.125 section) The product is 2 x 20x1.75/2.125 bicycle tubes. About shipping: The shipment is timely, the package is stored in the Amazon warehouse, and once we receive your order, Amazon will ship your item in a timely manner. How to install tires and precautions: 1. The rolling direction of a tire is the mounting direction of the tire (some tires are marked with an arrow, and the direction of the arrow is the rolling direction of the tire). First, clean the inside and outside of the tire to prevent the presence of foreign substances such as gravel and impurities, and then install the tire according to its rolling direction. 2. After installation, inspect whether the bead (tire edge) is uniformly symmetrical, the bead must be outside the bead in all places and parallel to the bead in all places. Otherwise, there will be blurring when driving. 3. Insert the tube evenly into the tire with a small amount of air filling (less than 10%), stack the carcass in order and do not fold it inside the tire (folding and inflating it is easy to puncture), the tube and tire together over the steel ring, and check whether the lower tire is completely packed into the tire, and there should be no small steps between the tire and the steel ring. You can then start aerating the tube. The installation is now complete.