Hello folks.
So, I've been keeping the keyboard warm with numerous questions about the first bike, I've bought in 15 yrs, and the tech has moved past me.
I want to re-grease my wheel hub bearings, but the hub has only one cone nut. I'm lost. I always had 2 cone nuts with 2 cone wrenches on each side.
It is a Modus Fat bike hub
The manufacturer is a Chinese distributor, so tech help is nil.
Any help would be appreciated

It may have cartridge 'sealed' bearings.

That is what I was going to suggest.

Remove the nuts, and see what is under them.

May just be caps and not nuts at all.

And we're supposed to tell WHAT from that pic?
What's the other end look like? If the same, then you have 2.

Is the silver washer appearing part some kind of locker? Looks 2 piece.

Sealed bearing.

Not a cup and cone hub.
sealed cartridge bearings, little self contained units that just press into the hub shell.

you don't service it, you wait till the cartridge bearings wear out, then replace them.

or you do weird ghetto stuff with prying the seals off the cartridges, flushing them out, then pumping new grease into them; but that's akin to trying to refill a disposable lighter. you aren't really supposed to do it.

Yup, so it is just a screw on cap. with sealed cartridges under. Interesting. So I guess with that set up, you never have to worry about loosening or what?

What...

.
...Raleigh did this for a long time on their 3 speed bike front hubs (which were adjustable bearings, unlike yours appear to be.) You adjust the final bearing play with the wheel installed in the fork, so the axle nut acts like another lock nut for the cones.