The motor cassette drum is a key component that allows the cassette with gears to be mounted to the electric motor in the bicycle. For the S1100 and S2100 engines, the cassette holder is specially designed to perfectly fit these models.

The cassette drum serves several important functions, such as:

• Allowing the gear cassette to be attached to the electric motor
• Ensuring the proper operation of the derailleur system on your electric bike
• Protection of the engine interior against dirt and damage

When selecting a cassette cassette for your S1100 or S2100 engines, it is important to ensure that it is compatible with the gear cassette used on your bike and with the engine model you have selected.