A03 is an automatic 3-speed internal gear hub,
adaptive mechanical shifting system ideal for daily riding.
Centri : Centrifugal Force
Gear : Planetary Gear
The system is working based on planetary gears and centrifugal force-triggered to achieve seamless 3-speed transitions. It is suitable for most of city scenarios.
Compatible with various bikes with or without motor, offering more design flexibility.
Fully seal structure effectively blocking dust and water corrosion while ensuring long-term stability and long lifespan.
