These inner tubes' expandable width can accommodate 1.75-inch, 1.90-inch, 1.95-inch, 2-inch, and 2.125-inch tire widths, ensuring compatibility between different models. HIGHLY COMPATIBLE INNER TUBE REPLACEMENT FOR ROAD AND MOUNTAIN BIKES - Universally compatible with different bike brands and models, these inner tubes perfectly fit on tires of known brands like Kent Bikes, Royce Union, and Schwinn. EXTRA-THICK BUTYL RUBBER FOR MAXIMUM RIDING COMFORT - Effectively dampen the impact from jumps, bunny hops, and sharp turns. CalPalmy's range of inner tubes has superior shock, impact, and vibration dampening capabilities. This is made possible by the thick, strong, and durable butyl rubber that is designed for heavy-duty and high-impact applications. EXPLOSION-PROOF INNER TUBES - Safety is our priority. CalPalmy aims to produce products that are safe and are of high-quality. That's why our range of replacement inner tubes are thorn and tear-resistant with self-sealing capabilities to prevent huge punctures that can turn explosive. Protect yourself and your tires with our explosion-proof inner tubes. Count on AR-PRO!