How To Determine Which Replacement Standard Hubs Will Fit Marine Master Trailer with Vault Hubs
Question:
I have a Phoenix Bass Boat with a Marine Master trailer. It comes from factory with Vault hubs. I am hearing horror stories about the hubs and bearings. Could you Supply me with your part numbers that I need to change over to regular bearing buddy grease hubs or even purchase a complete hub set up to just swap the entire thing out. It is a tandem trailer and i would need 4 of everything to make the transfer. Thanks in advance…..
asked by: Chuck M
Expert Reply:
I'd be happy to help, but I need to know the capacity of your axle, if you have brakes, and the bolt pattern.
The easiest way to get this information is on the axle tag which is located on the center of the axle beam, so sending me a picture of that would be the easiest for both of us.
If that tag is missing, then what you'll need to do is remove one of the hubs and using digital calipers # PTW80157 measure the spindle in the locations shown in the diagram below. Also while doing this count how many wheel studs are in the hub, (4, 5, 6, or 8).
Once I have this information I'd be happy to find replacements for you.

Products Referenced in This Question
4" Carbon Fiber Digital Caliper
- Hand Tools
- Measuring and Layout Tools
- Digital Calipers
- Carbon Fiber
- Performance Tool
more information >
Product Page this Question was Asked From
Easy Grease Trailer Idler Hub Assembly for 3.5K Axles - 5 on 4-1/2 - Galvanized
- Trailer Hubs and Drums
- Hub
- EZ Lube
- L68149 / L44649
- Marine Grade
- For 3500 lbs Axles
- 1/2 Inch Stud
- 5 on 4-1/2 Inch
- 13 Inch Wheel
- 14 Inch Wheel
- 14-1/2 Inch Wheel
- 15 Inch Wheel
- etrailer
more information >
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Kevin K.
3/30/2024
34528 is the last five on my axle. I’m having the same issue. Could you send me the size please for a standard hub replacement? Thanks