The Shaft Drive Transmission System (SDTS) is the heart of Amis chainless bicycles. Its internal 35º Spiral bevel gear is crafted from strong chronoly and encased in an aluminum alloy housing.

The sealed gears and carbon steel transmission inside are invisible and impenetrable from dirt, mud and other debris; providing unbeatable reliability and smoothness.

Your pant legs will never again fall victim to greasy chains or sprocket wheels. Featuring the Shimano Nexus Rear Hub, this technology provides the simplest, smoothest, safest, cleanest, most reliable and noise-free ride available.