I have a 1997 Calkins Trailer, model # K-15-100, and I can't find Bearing Buddys or equivalent that fit my hubs. I tried 1980 (1.980 dia), they were a touch too big. Then I got 1938 (1.938), and those are too small fitting barely inside the hub. Bearing Buddy makes a 1968 (1.968) but I can't...