The AKM cassette motors are normally 142mm wide, which makes installation a bit harder, and they need the rim to be built off-set a lot more than a freewheel motor, which can give spoke tension issues if not built very well. My rule is 7-speed or less = freewheel motor, and 8-speed or more = cassette motor, but if they do the cassette one cheaper enough (unusual, they're normally more expensive), I might make an exception.
You shouldn't take notice of irrelevant tripe found on Google searches from guys that haven't a clue what they're talking about. The Volt people are nice guys, but they're not too good at figuring things out. We had a challenge on the Gadget show between a bike I built and one they built. Mine absolutely blitzed theirs. Theirs wasn't even half-way down the course when Jason on mine was over the finish line. Jason didn't even break a sweat, while as the olympic champion Amy (really nice girl in all respects), poor thing, was literally lying on the ground gasping for breath and unable to speak afterwards, while Jason was non-stop saying how good his bike was. It might have been that Volt put the wrong cassette on their bike or something like that.
They cut all that out when they put it on the TV, re-ran the race with Jason riding side-by side with Amy and tried to make it look close because what actually happened in the race was too one-sided.
View attachment 64018
Whole video of the race in post #26 here:
There was a commercial comparison of the two bikes, with the implication they were comparing two road legal machines, which they were not. The implication is there because 1) the volt is a road-legal machine, and 2) the number of people who possess sufficient private land to make a serious and...
www.pedelecs.co.uk