I’ve now explored the knobbly tyre options for 20” wheels and been pleasantly surprised at the good choice available.Tubeless on my G-Line, they come with tubes, but are sealed rims and all you need to do is whip the tubes out, add some Stans, and you are ready to go.
Battery does not interfere with stability at all, the 20" rims and fairly fat tyres dial any instability out, it actually handles pretty well, goes where you point it, grips well and handles well (Jesus I sound like I own a Triple black rallye denali touratech edition GSA now)
I've got the handlebar remote fitted to, so there's a short burst "Turbo" mode you can access using that for a quick getaway from congested junctions if you need it to.
I need to get to a few bike shops that supply the few options I like now.
Ta.