Did the wheel bearings a few years ago on my Ranger boat trailer and got new tires. It has bearing buddies and I thought I did everything correctly. Fast forward 4 years or so without too many miles (prob less than 1000) I noticed some weird tire wear. The outside is down to barely any tread and the middle lugs are worn on the back side of each block. I did a search on tires wearing outside and tire pressures came up. I normally run 40-42 lbs in the tires. Others have said run 50 or you get outside wear like something fierce. These are cheap Hi-Run tires. Trailer seems to pull smoothly even at 80 mph. The place I got them mounted said they didn’t need to be balanced which I thought was weird. After talking to my buddy who is pretty mechanically inclined, he asked if I torqued the wheel bearings when I put them in and I did not. He wants me to tighten the castle nut to say 65 ft/lbs and back off. I only finger tightened the nut, that’s how I believe it was. Not sure it would do much since I lightly tapped the bearings in the race with the tool that barely fits inside the race. Also if I remember correctly, if the castle nut was tight, the wheel was having trouble moving. After packing the hub and bearings, I remembered to fill up the bearing buddies too. I always thought the trailer had a loud humming sound after new tires and repacking.