Gearboxes are less efficienct than a cassette, and there doesn't appear to be any technology that will change this. They spin an entire gear cluster, in oil, the entire time and this uses extra watts.
If this gearbox is on a pedal bike, or on an e-bike, isn't going to change this fact.
Then he's a 90 kg rider, on a heavy bike, with slow rolling tires, so the result is predictable.
If this gearbox is on a pedal bike, or on an e-bike, isn't going to change this fact.
Then he's a 90 kg rider, on a heavy bike, with slow rolling tires, so the result is predictable.