Simply Better Gearing

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. Here are 3 Things You Need to Know About Internal Gear Technology:

1. Where are the gears?

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 the tranmission on a car - giving a wide range of gearing in a 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 are designed to require very little maintenance and are sealed to safely protect them from dirt, debris and damage.

2. How do you operate an internal gear hub?

Our bikes are infinitely easier to operate than chain bikes. Our internal gear hubs are controlled using one of Shimano's fast and responsive rapid fire or twist grip shifters operated by your right thumb and forefinger so gear changes are fast and smooth. Internal gear hubs are designed to require fewer gears to cover a wide range of gearing. For instance, each gear change on our bike is like changing 2-3 gears on a chain bike - so you can transition quickly from hill climbing to cruising with a quick twist of the wrist. These twist grips also feature a gear indicator that tells you what gear you are in at all times. In addition, with the internal gear technology, the gearing is independent of pedaling. So unlike chain bikes that require you to pedal through a gear change, you can change gears on our shaft drive bike any time, even at a complete stop; so you are always in the right gear for any situation.

Bicycles">3. How Many Gears Do Your Bike Have?

Dynamic Bicycles shaft drive bikes are available in 7-speed and 8-speed models that offer a versatile range of gearing to deliver all the fun without the chain.

Think about it – how many gears do you really use? Shimano’s internal gear hubs merely spread out the gears for you, giving you tremendous gear range with fewer steps.

8-Speed Bicycles

Using Shimano's family of 8-speed internal hubs, these bicycles were designed to keep up with your riding ambitions with our widest available gear range. They offer a gear range comparable to 21 gears of a 24-gear chain bike to power you up hills as gracefully as they speed you along city streets or country roads. Depending on the Dynamic bicycle model, our 8-speed bicycles are configured using either the Nexus 8-speed, Nexus Premium 8-speed, or Alfine 8-speed hub. The Nexus 8 is the most economical 8-speed hub on the market, delivering the same wide range gearing as all Shimano's 8-speed hubs, packaged into a cost effective hub that offers a great value and proven reliability. The Nexus Premuim 8-speed hub (identifiable by its red stripe) is a rugged and versatile hub designed using highly durable gears for more aggressive riding. The Alfine 8-speed hub is designed for use with disc brakes, offering improved all-weather, all-season braking performance. Our 8-speed bikes are designed for riding at 15-20 MPH at a pedaling pace of about 60 pedal revolutions per minute (RPMs). Faster pedaling speeds can readily exceed 25+ MPH. View a detailed gear ratio chart.

7-Speed Bicycles

Our 7-Speed bikes models are proven workhorses featuring smooth, easy gearing for worry-free, everyday riding. Featuring its smooth, responsive shifting, these bicycles are super easy to operate and fun to ride. Our 7-speed bikes offer a gear range comparable to 18 gears on a 24-gear chain bike. This provides cyclists with a wide range of gearing to conquer streets, trails - even moderately hilly terrain - with ease. Our 7-speed bicycles were designed for riding at 12-15 MPH at a pedaling pace of about 60 pedal revolutions per minute (RPMs). Faster RPMs can achieve 25 MPH. View a detailed gear ratio chart.