The magnesium alloy housing is engineered as an ultra-lightweight structure—weighing 127g on the left and 197g on the right—effectively addressing the weight limitations commonly associated with gearbox systems.

The use of magnesium brings the combined housing weight to just 324g, delivering a 35.6% reduction compared to aluminum alternatives.

This weight reduction enhances acceleration responsiveness and helps minimize rider fatigue during long-distance riding.

The magnesium housing satisfies the rigidity and durability requirements of high-torque gearboxes while suppressing unnecessary mass increase.

Furthermore, die-cast production ensures consistent quality and lower manufacturing costs.