Hub and Wheel Recommendations for Converting to Oil Bath Hubs

Question:

I have a tandem axle boat trailer with six lug hubs. Looking for the correct part number for the oil cap to convert from a grease filled hub to the oil bath type. It has 5200 LB axles with about a 3 inch roughly sized dust cap with the rubber center cap that currently holds grease in. I want to move to oil bath. I have the 10-36 seal with 25580 inner bearing and the 15123 outer bearing. Thanks!!

asked by: Jason T

Expert Reply:

As far as caps are concerned the main difference between an oil and grease caps is how they have to attach to the hub. Grease hubs will press in, while oil seals need to be screwed into a threaded hub.

You will need to upgrade to oil bath hubs. We have oil bath hubs that would fit your spindle, except they all have an 8 on 6-1/2 inch bolt pattern. One of them is the Trailer Hub and Drum Assembly # 8-219-9UC3.

This hub would work on your trailer, but you would need rims that have the same bolt pattern also.

For a rim with the 8 on 6-1/2 inch bolt pattern you would want a Karrier Tires and Wheels # AM34903. I attached an FAQ article on how to measure bolt patterns also.

expert reply by: Jameson C