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ah I’m very sorry to hear that about your granny. I agree and don’t think that e bikes are a cure-all.
Your cargo bike is very light, the one I am using is approx 60kg unladen. And 200kg+ when fully loaded (not including me)
starting from stand still is when the weight and resistance is felt the most (aside from going up hills). Once past the assisted speed of 16mph I can push it to 20mph+, it’s not that hard. But without the motor helping me up to 16mph i feel exhausted v quickly. It’s like a barrier that is very hard to push up to without the e assist. Maybe I have grown to be too reliant on it 😅
MCamb
Brommers
Before modifications it was 20kg build up as single speed.
Is there a wattage formula somewhere? Would be nice to know what sort of power output is required so one can judge whether motor is required or not.
I think I am of the opinion that if you can't ride a bike without a motor support you definitely should not be using a motor to do so. Being physically able to control the bike is necessary for it to be safe and if you take on a loaded bike you can't ride and put a motor on it it ends up even heavier and harder to handle. That is a recipe for failure.
When my granny turned 80 they bought her a electric bike so she could ride well into her old age. First time she tries it she looses control over it (because of the weight) trying to get on and falls and breaks her hip. She hasn't been able to ride a bike since.