
Nice Heavy Roller, this is a great upgrade for the dingy cheap wheel that came with my Port Cargo Trailer Jack. This wheel dragged down my driveway instead of rolling and left crazy black marks on the brick, which infuriated my wife. This one rolls like a champ. I reused an old bolt that didn't have a Zerk connector so it wasn't easy to lubricate the bearings. I just poured some in and collected it. The jack wheel doesn't roll much so I expect it to be a lifetime lube.