I have the 5×8 NT trailer but no long haul road experince, but the bearings look adequate considering how light the CLC teardrop is. I think it was on the NT Q&A section it was recommended to inspect the bearings fairly frequently. Maybe every 10000 miles and repack them as there are no grease nipples. My trailer’s bearing assys. do have grease nipples. I plan to check the the bearings often until I get a feel for their longevity. I also will order a pair of replacement bearings so if they seize up in the middle of nowhere I’m not trying to FedEx spares to the side of the road.