Evening (morning) all.
Been looking at my trailer today in order to understand how I should be greasing my bearings. The online vids I've looked at show a grease nipple in the middle of the hub, under an easily removed cap, which you use your grease gun to shoot grease into.
My wheels look like this:
...and the domed black plastic thingy doesn't look like it wants to come off. I haven't ragged it about much as I don't want to bust anything. We've covered about 800 miles with it since we bought the boat in November and I figure I out to start thinking about maintenance.