Wide Compatibility - This 16x2.125 tire and inner tube set is compatible with Electric Bicycle Bike Motorcycle and Most Kids Bikes Like RoyalBaby, Joystar, Dynacraf. This 16x2.125 bike tire is suitable for 12-inch rim Heavy-Duty Tires & Inner Tubes -These 16x1.75/2.125 inner tubes made of butyl rubber offerexcellent air retention. Feature 45% more rubber content, 4.8x increased flexibility Giving these inner tube tubes an expandable width to accommodate 1.75", 1.95", 2" and 2.125" tires Shock-Absorbent Inner Tubes - Protect your kids from shocks and bumps, comfort still begins from the contact point to the ground: the tires. 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 kids. Safe in any season or weather condition Superb Grip On Wet Roads - Designed with block-and-strip tread pattern, that enhances the tire's grip, traction, and drainage, making this tire the safer choice when riding over wet surfaces;And the tire made from 4-layers of nylon reinforced plies carcass pliers, and upgraded 9-strand bbead chafers. These features prevent bulging and make the tire explosion and shock-proof We’ve Got You Covered –Tire tube set includes: 1 set 16x1.75/2.125 tires and inner tube,2 * valve caps,1* Valve core wrench. WEIYINGSI 16 Inch 16 X 2.125 Bike Tires and Inner Tubes Fits for Electric Bicycle Bike Motorcycle and Most Kids Bikes Like RoyalBaby, Joystar, Dynacraf