What Are Trailer Bearings And Races
INNER RACE / OUTER RACE (AKA CUP) The inner and outer race come pressed-in new hubs. They provide a smooth surface on which the bearings spin. In the case where a race is being replaced on an older hub, the correct size can be selected either by:
- looking for the small stamped part number on the race
- measuring the old race and finding the match (see measurement chart)
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