On the suggestion of a friend, I'm replacing the whole hub assembly on the axles.
There are various sizes, but here is one for heavy duty use. You'll need to know the diameter of your spindle.
Check out this size which fits many boat trailers. I'm going to try to find the sizes of various manufacturers and make a chart of the Vortex hub needed for many boat trailers.
Be sure to get the right size for your trailer! If you click below to go to eBay, you can search for other sizes too.
The one to get is the Lucas Marine Grease-filled hub.
