The chain transmits power from the sprocket to the rear wheel and is exposed to a tremendous amount of stress in the process. The chain is often overlooked at needing maintenance and even replacement. After periods of use it can lead to wear and tear on other components of your bmx bike. 720 BMX SHOP has a wide selection of BMX chains in a variety of styles, colors and weights. Full Link chains are the industry standard and the most common type of bicycle chain. Half Link chains have shorter links and allow for fine tuning of the rear wheel position in the dropouts.