Fits 20" x 2.5–3.0 tires (ETRTO 64/76-406) 32 mm (regular valves) What this tube does for you - Reliable sealing and long life: Made from butyl rubber for excellent air retention and resistance to ozone and aging. - Smoother, safer ride: Built-in shock absorption reduces road vibration and improves comfort on uneven surfaces. - Durable and versatile: Electrical insulation and robust material reduce the risk of damage over time. Key specifications - Size: 20" x 2.5–3.0" - ETRTO: 64/76-406 - Valve: 32 mm (regular valves) - Material: Butyl rubber Benefits at a glance - Quick replacement: Install a new tube in minutes to get back on the road. - Better performance: Maintains consistent pressure and absorbs impacts for a more comfortable ride. - Low maintenance: Butyl construction resists cracking and degradation from ozone and weather. Installation and safety tips - Add a little air to the tube before installing so it holds shape and won’t twist or bunch up; this helps prevent pinch flats. - When inflating from a fully flat tire, follow your tire’s inflation guide to reach the correct pressure. - After installation, check that the tire bead sits evenly on both sides of the rim before finishing inflation. Practical use scenarios - Commuting: Keep a spare for quick roadside replacement to minimize downtime getting to work. - Recreational riding: Ideal for weekend rides on wide 20" tires where comfort and shock absorption matter. - Maintenance and repairs: Handy replacement for routine bike shop service or home bike maintenance. Compatible with wheels and tires matching the listed ETRTO and size. Follow standard safety and inflation practices for best performance.