Durable construction - Made from robust iron and high-strength plastic, these training wheels are built to last and provide reliable performance. Adjustable footrest - Footrest adjustment ranges from 22 cm to 31 cm, allowing a comfortable fit for growing children. Broad compatibility - Designed for bikes sized 40.6 cm to 61 cm, making them suitable for a wide range of children's bicycles. Stable support - The reinforced support frame supports up to 75 kg, delivering secure and steady use. Use scenarios - Learning to ride: Attach to a typical 40.6–61 cm bike and use the adjustable footrest to maintain proper leg position as the child practices balance. - Shared family bikes: Easily transfer between different bikes within the size range to accommodate siblings as they grow. - Regular family rides: Durable construction and high weight capacity provide reliable support for frequent use on weekend outings or school rides.