After seeing this geezer, I’m wondering whether there could be any practical need to go bigger than 4x 6374s. Just getting the most out of those alone will get you through 4 new soft, wide tyres every 100 km and you’ll need the core physique of a Greek God.
I’m not at a computer so I’m not going to do the maths…
But gear it high, as high as you want.
My 4wd running streetwing (may tech) 6374 motors wheels pins very easily on roads, despite being geared as the following.
12s battery, 190kv motor, 15/58 (I’m pretty sure) on 8 inch tyres.
Around 42-45mph with no rpm limit (but of course there is one)
In the video I was running 7inch tyres.
So yeah, if using it for onroad gear as high as you want, could likely get away with 70mph and still break and accelerate faster than an evolve (not that that is saying a lot though)
If going for off road, I would gear for 25-30mph, and not worry about really high power motors. Even the old trampa motors at 2400 Watts would be suitable.