Feature●The LUCK4U inner tube is made of high-quality butyl rubber, which has good thermal stability and air tightness, and is durable.●The 90-degree design of the LUCK4U inner tube makes it easier for you to inflate the tire.●Suitable for a wide range of models, suitable for Nanrobot D4+ D5+ D6+/ Schwinn Roadster Tricycle (rear tires) /Bob Gear Motion Stroller (rear tires)/Swagtron Swagcycle Envy/Swagcycle Pedal-Free Electric Scooter (rear tires)●Installation is simple, 2 crowbars can help install the inner tube during installation.●LUCK4U is committed to providing buyers with quality services.Description