Urban - Civilian - Civilian. Mike Sherman's Bicycle Gear Calculator. Dynamic Bicycles - Chainless Technology. Our chainless bicycles use a patented shaft drive system for smoothly and efficiently transferring power from the pedals to the rear wheel. Shaft Drives use precision cut gears, sealed cartridge bearings and a shaft rod - all assembled inside a fully enclosed aluminum housing. This fully enclosed design runs quieter, shifts smoother, and lasts longer than bikes with chains. With our shaft drive bikes, there is no more grease on your hands or your clothes; and no more chain and derailleur maintenance. Our chainless bicycles are also easier to operate. We combine the shaft drive with the Shimano internal gear hubs for smoother, faster gear changes that you can do at any time - while pedaling, coasting, or even at a complete stop.
Dynamic Bicycles uses the Sussex Shaft Drive System (SDS), the lightest and most efficient bicycle shaft drive system in the world. Our chainless bicycles use the Shimano 8-speed internal gear hubs. Abandoned Bicycles of New York. DAniellos Amity Bicycles - , - DAniellos Amity Bicycles.