It's vague info perhaps it's peak figures, it's in wheelie range, 2kw/kg and NM is relative to peak rpm. For the moment Its just a good sales video, no technical info there?
Is it really possible to have direct electric drive (no gearing) that is efficient at every speed? Of course i agree with the opinion that it's not so great idea to put the motor in car wheels. And they aren't exactly donuts, what's the advantage of the hole inside?
If a company has no demo videos of it's key technology in the lab from which it claims world leadership then the company is phoney. They sell by cohersion to naive trade show and phone victims. 2 seconds zero to 60 in invisible toy car which they threw across the room, same here.
Makes me think about how awesome a bike rim shaped motor could be; think about how much torque you'd get out of 2x the diameter of a regular hub... and theoretically get a power to weight ratio increase while you're at it.
What would be really impressive is if they could make it water proof, unlike basically every hub motor out there..
..which is made more important because the motor is sitting lower to the ground.. seems like a tall order..
As long as they pot the corrodable parts, and use bearings that are either "sealed" or lubricant packed or "uncorrodable" then I'd guess the primary problem to worry about is particle ingress along with the water that cause wear on surface (including where they builds up, and produce wear on surfaces that normally wouldn't touch each other).
Based on the recent thread of the Reevo ebike failure, where the hubless wheel design and/or manufacture was so bad that it was reported to not even freely spin 1/2 turn from a manual spin offground, other potential issues include bearing design that must be very low friction, since they are so much larger with presumably much more contacting surface area than ones at a hub/axle interface.
Electric Viking is mostly clickbait garbage and he often gets technical facts completely wrong, I don't waste time watching him any more. The BS title alone says it all: "Worlds most powerful EV motor weighs 41kG"
As long as they pot the corrodable parts, and use bearings that are either "sealed" or lubricant packed or "uncorrodable" then I'd guess the primary problem to worry about is particle ingress along with the water that cause wear on surface (including where they builds up, and produce wear on surfaces that normally wouldn't touch each other).
Hubless wheels are usually constructed like a cylindrical conveyor belt, with a number of rollers supporting the hoop that holds the tire. That makes problems when anything is out of round (which we saw in the video after Seth hit a tiny bump on a ped bridge), and it can be noisy and draggy if everything isn't perfectly smooth and dimensionally true.
In principle, it doesn't have to be any different than a stub axle wheel with a grotesquely oversized diameter. However, that is predicated on having a very stiff and strong (therefore heavy and/or expensive) rim and humongous bearings that may or may not be especially heavy but are definitely expensive.
In that instance, it's not actually a hubless wheel, but rather a regular wheel with a very large hub and axle. But it would have some of the same shortcomings in terms of expense, relative fragility, weight inefficiency, and maintenance difficulty.
The optimized solution for hub motors is what large diameter direct drive hubs already use, with a spoke supported stator fixed to the axle, and a side cover supported rotor turning on smallish axle bearings, with only enough surplus diameter to accommodate a cable conduit.
Exactly what I thought when I first saw all this stuff, I'll admit it could potentially be cooled better than other hub motor constructions but I'm not sure that is the best solution for that problem considering the other issues with the design. I think their power claims are basically cheating peak vs continuous power, like sure most motors can put out much higher power than rated continuously in some ideal conditions but you want a motor that will do it's claimed power in most conditions.
The diameter is awesome and will result in killer efficiency and power in the low to mid RPM bands.
This rim-sized diameter can make the motor superior to a mid drive in pretty much every way. It would be great for an ebike.
The Magic Pie with an external controller and RH212 are truly awesome DDs in mountain climbing scenarios. Moreso the Magic Pie. More diameter, more better!
I need to see an outstanding solution to prevent water and dirt ingress before i'd be willing to buy one though.
don't know if the weight can lean into bends because of centrifical force. Perhaps Bionx can be compared for hub size? Plus what would the pedals join up to?
www.donutlab.com
www.vergemotorcycles.com
arstechnica.com
then I'd guess the primary problem to worry about is particle ingress along with the water that cause wear on surface (including where they builds up, and produce wear on surfaces that normally wouldn't touch each other). 
