Frog 61 24 Inch(For subscription only read on more below about subscribed bikes) This 24 inch kids' Hybrid Bike is the ideal multi purpose, geared bike for 8 to 10 year olds with an average inside leg of 61cm. The Frog 61 is designed for longevity and has been optimised to help maximise the lifetime of the bike for a growing child. It offers a lower bracket position to ensure a safer more ergonomic riding experience, which also allows for a greater leg length range