【Portable Airless Technology】: These Balance Bike Replacement Wheels feature innovative airless technology, eliminating the need for inflation and the worries of leaks or blowouts 【Double 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 easily 【Product 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 installation 【Shock 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 riding 【Enhanced Safety Features】: With a sturdy wheel design and anti slip patterns, these training bicycle wheels offer great grip to prevent slipping or tipping over Specification: Material: PP PE Size Chart: Diameter: 27 cm/10.63 inch Distance Between Two Bearings: 6 cm/2.36 inch Package Includes: 1 Pair Balance Bike Replacement Wheels Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.