Often called Chainwheels, Dan's Comp has dozens of choices for your BMX bike. Whether you are looking for a specific color, material strength or tooth number, Dan's Comp is sure to have what you are looking for. Bolt Drive Sprockets are considered the standard in BMX. The sprocket is held in place using a single bolt that connects the sprocket and crank arm together. Bolt drive sprockets are easy to install and work on a wide variety of crank spindles.