Size and Compatibility - Valve length: 32 mm (regular valves) - Designed to fit 20 x 4.5–5.0 bike tires (confirm the tire size stamped on the tire sidewall before purchase) Why you need this tube - Direct replacement for worn or punctured 20 x 4.5–5.0 inner tubes so you can get back on the road quickly. - Standard 32 mm regular valve fits rims that accept common valve lengths without modification. Key benefits and performance - Durable butyl rubber construction: delivers reliable air retention and consistent sealing for longer service life. - Ozone and aging resistance: resists cracking and degradation from sunlight and weather exposure. - Shock absorption: improves ride comfort on rough or bumpy surfaces by damping impacts. - Heat resistant and wear tolerant: stands up to daily use and typical riding conditions. - Electrical insulation properties: inherent to the butyl material. Easy installation and use - Quick to install: replace an old tube within minutes using common tire levers and a pump. - Installation precaution: always check the tire sidewall for size to ensure correct fit. - When inflating from a completely flat tire, follow the inflation guide to seat the bead and avoid pinch flats. Practical applications - Fat-tire commuter bikes and electric bikes that use 20 x 4.5–5.0 tires — reliable replacement for daily riders. - Beach or trail riding where wider tires require robust tubes for impact resistance and comfort. - Rental fleets, bike shops, and personal spare kits — a straightforward, durable tube to keep bikes in service. What’s included - One 20 x 4.5–5.0 inner tube with a 32 mm regular valve. Notes - Verify tire size on the tire sidewall before installation. - Use appropriate tools and follow safety and inflation guidelines when installing and inflating the tube.