Heavy Duty inner tube: 26"x1.75/2.25" AV32MM(45/57-559) Heavy duty bicycle inner tube, these inner tubes are ideal for a wide range of applications. Enhanced the ductility of the heavy load tire, so that the scope of application is expanded, with 26x1.75 26x1.90 26x1.95 26x2.0 26x2.10 26x2.125 26x2.15 26x2.20 26x2.25 tire tubes Excellent shock absorption ability :The heavy, strong, highly durable butyl made from these inner tubes is a perfect shock absorber to reduce vibration and eliminate the shock caused by bumps and rough surfaces on the road or pavement. Heavy Duty butyl for maximum ride comfort - upgrade your ride experience. HEAVY DUTY - Tightness: high elasticity and high quality butyl and EPDM , the thickness is increased by 40%, and the tightness of the inner tube is increased by 200% than that of the ordinary butyl inner tube; After inflation, the tire can maintain a higher pressure for 6-9 months, greatly reducing the inflation frequency. Good tightness helps keep tire pressure stable, thus improving driving safety. HEAVY DUTY- Ultra Durable: Our heavy duty inner tubes have higher puncture resistance than ordinary inner tubes, and the thicker body can withstand more friction and wear, thus extending the life of the tube, reducing frequency and maintenance costs. And in long-term use. This heavy duty inner tube is with the corresponding models of mountain bikes, road bikes, Cruiser bikes, bikes; At the same time, the increase in thickness can meet the needs of the longer driving range and load of the prevailing bicycles. Installation: 26"x1.75"/2.25" bicycle heavy duty inner tube for easy installation and removal. Check the valve position to ensure that the installation direction is correct Tip: Before installing the inner tube, please put the inner tube into the water for inspection, if there are bubbles, it means that it has been damaged, you can . Check the valve position to ensure that the installation direction is correct. Note: The inflatable inner tube should avoid puncture by sharp objects