Frog 53 Kids' Mountain Bike This 20-inch wheel kids' bike, is the fourth bike in Frog's new and improved frame range, which has been carefully designed to help maximise the lifetime of the bike for a growing child. It is the ideal multi-purpose bike for 5 to 8-year-olds with an average inside leg of 53cm. Key Features Handlebars can be lowered or raised within a range of 40mm and adjusting the seat height is easy to do at home with the quick release system A lower bottom bracket position ensures a safer riding position with feet closer to the ground, whilst allowing for a greater leg-length range to be accommodated Lightweight and sturdy frame, weighing 250g less than its predecessor at 8.15kg, makes the bike easy to manoeuvre Tektro brakes with small, easy to reach brake levers. Better control means improved confidence for young riders FrogFitTechnologyR youth-specific 8-speed gear shifters with short lever travel and ultraslick cabling make changing gear and undulating rides a breeze Patented Frog cranks maintain a low Q-Factor (the distance between the pedals) for easier pedalling. A reduced distance between the pedals allows for maximum leverage on the pedals increasing efficiency Quick-release seat post for easy height adjustment as they grow Reflectors, mudguard and bell included Frog Bikes Sizing As an example of their original approach, rather than numbering their kids' bikes by wheel size, Frog size their bikes by inside leg measurement. Hence the Frog 53 is recommended for children with a minimum inside leg measurement of 53cm. This corresponds with other manufacturers' 20 inch wheel kids' bikes. The Frog 53 would therefore make a great bike for children from 5-7 years old. Shop All Frog Bikes > Shop All Kids Bikes > Frog Bikes Size Guide >