A trailer bike is a one-wheeled bike extension that attaches to the back of your bike. They are an efficient way to bring your child on a longer bike ride. Your smaller companion can assist you with pedaling, while you control the steering and speed. This allows your child to become familiar with the process of riding a bike, and they can relax if they feel tired. The original trailer bikes were introduced into the market by the Adams company in 1986. They were marketed under the name “trail-a-bike”, and this is now their trademarked term. Most trailer bikes also include adjustable handlebars and seats that accommodate a growing child. See a our roundup of trailer bikes here.