Widened and stable design The auxiliary wheels are widened to enhance stability and prevent rolling, providing a safe and balanced riding experience for children on 14, 16, and 20 inch bicycles. This design helps reduce tipping during early wheel-to-ground training and supports confident practice. Magnetic luminescence without batteries PU flash wheels feature magnetic luminescence that creates a fun, vibrant look. The flashing effect requires no batteries, making it convenient, low maintenance, and environmentally friendly. Quiet and comfortable ride Made from durable PU material, the wheels are thickened and wear resistant to deliver a smooth, silent ride. Children can enjoy their rides with minimal noise and distraction, even on longer sessions. Simple to install and compatible These bicycle auxiliary wheels are easy to attach and use. They are compatible with a variety of baby bikes and can be quickly mounted, with no complicated installation process required. Recommended use scenarios - Early riding lessons: Use the widened wheels to help beginners maintain balance and confidence on 14, 16, or 20 inch bikes while learning to pedal and steer. - Evening family rides: The magnetic luminous wheels provide a visually appealing glow, adding excitement for kids during dusk outings without needing extra power sources. - Daily neighborhood rides: The quiet, durable PU wheels offer a comfortable, low-noise ride for short commutes or park trips, making rides enjoyable for both kids and parents.