BMX race bikes are built to perform in the rigours of intense off-road racing and need to be sturdy, light, fast and maneuverable. BMX racing bikes have one gear, meaning the rider needs to have a gear ratio that can get them to speed quickly, accelerate out of corners, up hills and over jumps. BMX race bikes have a larger front sprocket than other BMX bikes, which enables the rider to pedal at higher speeds. Good brakes are also important to enable the rider to slow down rapidly to negotiate corners and other obstacles. There are two wheel sizes for BMX racing bikes 20 inch, which is the more commonly used and 24 inch cruisers. BMX racing was introduced to the Olympics in Beijing, 2008.