WLToys k989 rear hub
thingiverse
This is a rear hub for a WLToys k989 rc car. If you need the other side you should just be able to mirror this one. I would suggest printing on a fine setting (.1mm-.12mm) as it should help the the smoothness on the ball joints. I've ran off quite a few of these, they aren't quite as strong as the original, but if you can run off a few of them they can keep you going for a while.
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