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Race provides smooth surface for bearing to roll on inside of trailer hub. Works with 28580 bearing. Replacement part uses industry-standard number 28521.
Features:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to take a look at the replacement bearing race for the 28580 bearing. The race will provide the smooth surface for your bearings to roll on inside of your trailer hub. Typically, if you have to get new bearings it is a good idea to also replace the bearing races at the same time. The bearing races will install into your trailer hub, they're usually pressed into place. The replacement part like this we use an industry standard number, on this one you can see it's stamped 28521. Again, the matching bearing that goes into this that we do sell separately on our website is 28580. The critical measurement on this race is the outer diameter which is measured edge to edge right there.
Because it's measured in thousandths of an inch, what I'm going to do is get a digital caliper and that'll show you that measurement. In other words if we go ahead and put this on the outer diameter, and you can see the reading. I'm going to zoom in just a little bit. You can see 3.625 inches. That's the outer diameter on this bearing race. That should do it for the review on the replacement bearing race on the 28580 bearing..
Customer Satisfaction Score:
100% were satisfied with this product
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Ratings & Reviews
Gwendolyn Y.
4/11/2025
We will never settle for anything less than a perfect fit :)
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Mike L.
9/23/2026
Beautiful boat Michael, thanks for the cool photo!