The SDURO Hard Seven eBikes are the optimal choice for those looking for an eMTB for easy terrain or tours. The wide variety of bikes and the attractive price-performance ratio make this line one of the most successful worldwide. The motor is the technological core and defining characteristic of an eBike. The centrepiece of the frame: the motor interface. At this connection point many important functions come together: the engine mount, swing arm and shock mounts, and the battery and downtube connection. The more stable the interface is, the more stable the entire frame is. Thanks to our Gravity Casting motor interfaces we can integrate the motor in a compact manner without separate mounting plates. This concept reduces the space required to mount the motor and decreases the visual volume of the engine.