Has anyone ever seen a small planetary hub?

planetary or gear reduction?

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I think you meant "portal"?

I mean a planetary reduction. They make big ones, for heavy offroad machinery, and not so big ones (that end up on monster trucks) but I am looking for a small one.

Auburn Gear Wheel Drive

For what aplication?

Those working platforms have them.

what he said ^^^

You can move alot of stress form the transaxle by running a reduction on the wheels with larger tires / snottier motor.

Lots of unsprung weight to control.

sounds like a good little project to me

i have seen some with about a 6" aluminum ring gear with steel panets and sun... im not sure what it was off of though and the torque rating might have been alittle low... you might try looking for a set that isnt made nessesarily for a drive hub. you will have to adapt it to a hub but you will probly be able to find one that fits your needs.

What if you mounted them inboard? With an adapter it would be a strong unit(I think).

That would work.. And you can use an offset to control chassis height vs a-arm position..