Specifications Hign-concerned Chemical:None 27.5 inner tube + K1047 27.5 outer tire Specification: 1.outer tire :27.5*1.95, 27.5*2.10 2.inner tube:27.5*1.9/2.125 AV ,27.5*1.9/2.125 AV48 ,27.5*1.9/2.125 FV ,27.5*1.9/2.125 FV48 Package listone inner tube and one outer tire Characteristics of the outer tire The K1047 outer tire is a mountain bike tire designed to provide riders with high speed. The mall particle design with fine spacing reduces the rolling resistance to low speed. The circular design provides comfort when turning or cutting angles, and is suitable for dry terrain of medium to hard soil. Characteristics of the inner tube High-Quality Material :Crafted with premium butyl rubber, this bicycle inner tube ensures durability and long-lasting performance for your MTB bike. Versatile Size Range :Designed to fit a wide range of bike sizes from 26 to 2.4 inches, this inner tube caters to a variety of bicycle models. Easy Installation :With its user-friendly design, this inner tube can be easily installed, saving you time and effort. Optimal Bicycle Accessory :As an essential component of your bicycle, this inner tube enhances your biking experience by ensuring smooth and efficient tire function. Precautions for using inner tubes Before installation, clean the inner side of the outer tire to avoid any residual sand or sharp objects piercing the inner tire. Uneven inflation of a new inner tube is a normal phenomenon, as the rubber of the inner tube varies in thickness and the air nozzle becomes thicker. When subjected to the same pressure, the size of the expansion also varies. After loading, it can be used normally under the wrapping of the outer tube, which is not a quality issue. Installation Tutorial 1. Disassemble the tire, pry open the outer tire, and carefully inspect it 2. Replace the inner tube, align the air nozzle with the wheel hub hole 3. Insert the inner tube into the outer tube and install the outer tube 4. Fully charged, installation completed Inner tube Outer tire