YunSCM 2 pieces, 700 23c tubes, Presta valve 1.9 inches (48 mm), 700 x 18/25c bicycle tube, applicable 700 x 18c / 700 x 23c / 700 x 25c road bike, G-273

• 700 x 18 - 25c Bicycle Tube: Suitable for 27.6 x 7.8 inches (700 x 18 c/23 c/25 c), Presta valve 1.9 inches (48 mm) Suitable for road bikes. Note: Please check the size of your tire before purchasing. Tire size is usually displayed on the side of the outer tire
• (Space-saving and Convenient to Carry) The 700 23c tube is compact when folded, so you can carry it with you when you are on a long distance, avoiding the uncomfortable feeling of getting in the tube after a puncture
• High quality butyl rubber: This 700 18c bicycle tube provides a better airtight seal and maintains air for a long period of time. No need to hit the air
• 【BUDGET SAVING】:Doing it yourself will save your budget than going to your local store and replacing tubes. As a spare bike tube, you can avoid the awkward feeling that you can't ride after the tube burst
• 【Correct Installation】: First, push the tube into the rim, then inject a small amount (20%) of air into the tube. Next, install the tires and make sure the tip of the tire and rim are aligned and not pinch the tube, then reapply the appropriate air pressure to the tube. (Please note that if the tube and tire are not inflated together, i.e. only the tube is inflated or the tube is sandwiched at the edge of the tire and rim, it may cause air leaks and punctures. )

Suitable for 700mm wheels. Tire width is 18-25mm (700x18c-700x25c section common tires) Item included: 700x18/25c bicycle tube x 2 About Shipping: Shipment is timely and the parcels are stored in Amazon warehouse, when you receive your order, Amazon will send your item timely. Tire Installation Instructions and Precautions: 1. The direction of the tire rolling is the direction of the tire (some tire is indicated by the arrow, the direction of the arrow is the direction of the tire roll). First clean the inside and outside of the tire, prevent the presence of foreign objects such as gravel, impurities, and install according to the direction of the tire. 2. After installation, test to ensure that the beads (tire edge) are uniformly symmetrical, the beads should be all outside of the bead and all places are parallel to the bead. Otherwise, there will be a shake while driving. 3. The tube is inflated with a small amount of air (10% or less) uniformly inserted into the tire. The carcass are stacked in order and cannot be folded in the tires (when folded and inflated with air, it is easy to puncture), cover the tube and tire together with the steel ring, and inspect whether the bottom tire is packed in a small step between the tire. Then you can start aerating the tube. The installation is complete.