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I'm using the 5 speed and the range allows me to ride up to about 30 (down a hill obvs). Very usable first 3 gears. 3rd has me going at 15 with a cadence of 70-75 which I find comfortable on an electric bike.
With hi-torque motors this would seem to be a way to go as the technology develops, i.e., fewer gears needed. I suppose two or three gears below the cut-off speed of 25kmh, when the motor assists, then closer spacing for optimal cadence with human power above that.
I suppose that's what you get for something that is 1/6th the cost ish. I'm using the 5 speed and the range allows me to ride up to about 30 (down a hill obvs). Very usable first 3 gears. 3rd has me going at 15 with a cadence of 70-75 which I find comfortable on an electric bike. I was unsure about the range and the jumps between the gears before I rode it but it's perfect for me and an electric cargo. The shifting can leave a bit to be desired. It's di2 and I hated the auto feature. It does change to first if you stop and apply no pressure to the pedals which is great.
It's what I'd get I suppose. Rohloff is undoubtedly the best out there tho.