Read the trailer mtnce pdf on the info page, you pop the rubbercap off and squirt some marine grease in there every time you take it out. If you do that, your wheels will look like mine. Fulla grease. The fake bearing buddies on the stock hubs suck. I have not replaced mine yet. I have repacked my bearings once.
Maintenance procedures coming when the weather gets nasty. It's nice here 10 mos. a year:)