KT controller

[Nealh]

A good example of a very good hub which I use for my Roadrat and towing a laden trailer (up to 90kg) is the Bafang G370, it has a fairly high two step gear ratio and is 36v 201rpm rated so about 16/16.5mph at 700c.
I run it at both 36 & 44v but not for the speed but the unpowered ability, I have intentionally set the cut off low at 13.2mph just to get me going and then without too much effort rides nicely to 20 mph unde rmy own power (without a trailer). For towing slow I'm happy with for stability esp some of my precious cargo.

 

[PC2017]

My YOSE is circa 220rpm based on the sales pitch of 36v with that extra 30% on 48v I get 280ish rpm and better mph plus no issues up hills however I keep my amp to 14 or 15 if I swap out a controller, but my 14a has served me well & if I was to put my 17a on I would reduce that to 15/14. Now when that dies I'll use my new mxus but that rpm is 270 @36v so circa 330rpm on 48v but keeping my amps low should prevent/minimise overheating when up hills, but gain a mph or two. Any problems on 48v and I stick to 36v or amp reduce to 12/13