Portable Airless Technology: These Balance Bike Replacement Wheels feature innovative airless technology, eliminating the need for inflation and the worries of leaks or blowoutsDouble Materials Construction: Crafted with a sturdy PP hub and flexible PE tires, these Training Wheels are designed to withstand rough terrains without breaking or wearing out easilyProduct Dimensions: This pair of wheels are with diameter 27 cm/10.63 inch, with distance between two bearings 6 cm/2.36 inch, ensures a fit and easy installationShock Absorption and Noise Reduction: The Training Bicycle Tyre structure effectively absorbs road vibrations for smoother rides while minimizing noise levels, making it ideal for quiet ridingEnhanced Safety Features: With a sturdy wheel design and anti slip patterns, these training bicycle wheels offer great grip to prevent slipping or tipping overSpecification:Material:PP PESize Chart:Diameter: 27 cm/10.63 inchDistance Between Two Bearings: 6 cm/2.36 inchPackage Includes:1 Pair Balance Bike Replacement WheelsNote:Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.