Due to the underlying construction and design principles of our motor gearbox unit, the electric motor works in three ranges that depend on the selected gear set of the integrated gearbox. As the gear set changes, the motor’s speed changes and therefore also the sound that is emitted. 

These specific shifts between the gear sets depend on the number of gears in the integrated gearbox (9 or 12). In the 12-speed version, they are at positions 4<>5 and 8<>9 whereas in the 9-speed version at 3<>4 and 6<>7.

This principle gives the Pinion MGU powerful climbing gears with higher motor speeds. In the higher gears, however, it operates almost silently.