New build for mountain climbing

[Guretell]

Hello, I'm new here, until now I was just a observer, but now I need help to make a new build. My goal is to climb the steepy hills that my legs and my front bafang G370 10T on my classic MTB 26 inch can actually do, but before my motor melts and/or my heart, I am thinking about two options: AKM128CST 800W 36V 201 RPM laced in a 26" rim by a local shop, or a 26" wheel already built Bafanf G020 500W 48V 10T, but undervolted to 36, but I have no idea if the resulting RPM would be fine for hills or not. I want to keep the controller: 36v 22A (now limited to legal 15A), and the battery 10S4P 22Ah.
Second option is cheaper and easier, but at bit heavier. Any opinion will be wellcome.

 

[bananu7]

Any opinion will be wellcome.

For a hill-climbing hub, your best bet is going to be going with as large motor as budget, weight and dropout width constraints permit. Direct-drive 2-3kW motors run at 800W just fine (and quite efficiently, actually), and you won't have to worry about overheating (or gearbox maintenance) at all.

 

[Guretell]

You are right I've seen them, but they are too big and heavy for me, the AKM ar 2.82 kg is really light and keeps hidden between disc and cassette