When shopping for a bicycle adult, consider the bike’s purpose and use cases. A bicycle designed to go fast on the track may be less suited for everyday riding around town. Some bikes are more versatile and may have components that can be swapped out for a variety of uses. For instance, a bike with a mountain-bike-style suspension can be used on rugged terrain or for long distances.
Children can easily progress from tricycles or pedal-assist bikes with training wheels to bicycles that have their own pedals. These are usually geared and have either single or multiple speeds. Once they have mastered this basic level, many kids move on to 16″ bicycles. These are often single-speed and have rear coaster brakes (where you pedal backward to stop). They may also have training wheels that can be removed.
The next step up for most kids is a BMX bicycle, which are designed for street riding and trick biking. These are built to be durable and can withstand the abuse from riders doing tricks or stunts. You can find BMX bikes for adults at the X-Games and similar action sports competitions.
If you’re shopping for a bicycle as an adult, look for one with a frame size that fits your height. The best way to do this is by measuring your inseam, which is done with a tape measure and a large book that has a straight spine. Stand the book against a wall and place it between your legs with your knees bent. Then, measure from the floor to the top of the book’s spine—this is your inseam measurement. This number should match the bike’s sizing chart.