16'' x 1.75/2.15 Kid’s Bike Replacement Tubes: Fits most kid’s bikes on the market with 16’’ tires that are between 1.75’’ to 2.15’’ wide, like RoyalBaby, Schwinn, Dynacraft Magna, Retrospec Koda, JOYSTAR, Huffy and TItan – guaranteed fit! ADDS COMFORT TO YOUR KID’S RIDE: With thick butyl rubber that absorbs shocks (4X thicker than other brands), your loved one won’t feel the bumps and hollows because the bike will glide along, protecting the loving one from the force. Now that’s comfortable. SAFETY FIRST IS OUR MOTTO: We designed this inner tube to be explosion proof. When and if punctured, it immediately creates an airtight seal to prevent damage, destruction and injury to the rider. Safe in any season or weather condition. MADE HEAVY DUTY FROM QUALITY MATERIALS: Our Inner tubes are made from premium, 100% butyl, BPA and odor free rubbers, It’s our job to make dependable and durable inner tubes and we do it right! Count on CalPalmy! U.S BASED CUSTOMER SERVICE: We respond to any questions or inquiries within 5 hours. Not happy with your purchase for any reason? Not a problem, our 60 Days free return/exchange policy ensure you shop with worry free.