Just a tidbit I worked out because I was curious. I'm in the US, and average fuel economy jumps in about 0.3 MPG steps. I figured the raw values would be easily capable of measuring to ±0.1 MPG, especially when I've run a whole tank through it. Then I thought, it's a European car, maybe it uses L/100 km. Sure enough, if I go in steps of 0.1 L/100 km, convert to MPG, then round down to one decimal, I see the same step sizes as on my display.
I have a blind friend who is interested in buying a tandem trike of some kind. He's ridden on the back of my diamond frame tandem a few times, but isn't the most comfortable and thinks he'd prefer something we didn't have to balance. We're still a bit shaky starting off, and we crashed once at low speed, fortunately into grass. He also hasn't ridden enough to develop a saddle tolerance or much power, so he's sore even when the rides go well, which is why I'm leaning towards a recumbent.
Most of our rides would be low speed, on a bike trail or neighborhood streets, maybe ten miles, but I'd like to be able to get places at 12+ MPH (19+ km/h) on occasion, if only so he doesn't have to Uber around so much. I'd consider electric assist if that would be needed. We live in a somewhat hilly city, but won't have to go up any steep ones, maybe 200 ft (60 m) at 5%.
We're both average height, I'm about 165 lb / 75 kg, he's maybe 220 lb / 100 kg. I'm a fairly strong rider for a light guy in his fifties. There may be another captain, too, who's also over 200 lb.
He understands these aren't cheap and is willing to spend money for something that isn't crap. He's never had a car payment, so he can afford this. We're located in central Illinois, USA.
