The 20" wheel Monster is built to take a beating and be the ultimate 'go anywhere' machine whether on mud, snow or sand. With powerful mechanical disc brakes and Shimano 7 speed gearing - this fat bike is ready to tackle anything. 20"" wheel size suitable for ages 7 - 10 years old (125 - 140cm tall). Riding a fat bike is an experience like no other. It enables you to float over obstacles you would normally have to avoid, putting a huge smile on your face as you go. The new Reid Monster 20"" is one of our new breed of junior Fat Bikes built to get kids off the beaten track!