How Does Chainless Technology Work?
Dynamic Bicycles' chainless bikes combine two innovative technologies to create bikes that are smoother to ride, easier to operate, and simpler to maintain than traditional chain bikes.
- Patented shaft drive - smoothly transfers power from the pedals to the rear wheel using highly efficient and durable gears instead of a sprocket and chain. View the Shaft Drive Animation.
- Shimano's advanced internal gear hubs - all the gearing is neatly tucked away inside the rear wheel making it maintenance-free and protected from the elements.
The Shaft Drive
The shaft drive uses two sets of spiral bevel gears and a shaft rod to smoothly transfer power from the cranks to rear wheel. The bevel gears are made of heat treated cromoly and paired with high quality sealed cartridge bearings coupled to a steel shaft rod – all sealed inside lightweight, durable aluminum alloy. Our shaft drive, now in its third generation, has been in production since 1991, and is already on tens of thousands of bikes all over the world.
By integrating our shaft drive with Shimano's internal hubs, our bikes not only have a sleek, modern look, but they deliver an incredibly smooth ride, great performance and eliminate the number one complaint people have always had about their bikes – the chains and derailleurs. With our shaft drive bikes, there is no more grease; no more mess; no more cuts on fingers or tears in clothes; and no more chain and derailleur maintenance. Just pure, worry-free riding fun.
Internal Gear Hub
Dynamic Bicycles shaft drive bikes feature the Shimano Nexus family of advanced
internal gear hubs. These are the world’s best performing and most reliable
family of internal gearing. Internal gear hubs are an advanced gearing technology, whereby all the gears
are fully enclosed within the rear axle of the bike. These hubs are called planetary gears - much like the tranmission on a car - giving a wide range of gearing in a very compact space.
So unlike chain bikes that have fully exposed (external) sprockets and derailleurs, internal gear hubs compress all of this gearing into a compact, highly efficient cylindrical component (hub) inside the rear axle. This internal gear hub integrates seamlessly with our shaft drive to create incredibly efficient shifting and smooth speed changes. Shimano’s internal gear hubs require very little maintenance and are lifetime sealed and lubricated to safely protect them from dirt, debris and damage.
