How To Determine Correct Replacement Idler Hub And Bearings On A Used Lowe Boat Trailer
Updated 11/13/2025 | Published 10/20/2025
Question:
I bought a used Lowe boat trailer this year and Im interested in getting a spare hub and/or bearing kit for it, but I dont know the right part number for it. The axle sticker is worn, but the big print reads 310-01849-BL-A : AA01578 Non-Brake W/Springs. Based on the part number, I think it is a Karavan. It is a single axle trailer with a 5-lug hub and EZ grease spindles. Can you help me with finding the right replacement parts?
asked by: John G
Expert Reply:
Hey John,
Unfortunately I was not able to find any information regarding the exact bearings used on that axle based off of those numbers you got off of the axle tag. In order for me to find the right replacement/spare hub for you, you will have to remove a hub and either measure the spindle or take the bearings out to get the bearing numbers. I have attached a photo that shows how to measure your spindle to get the right size bearings.
There are a few different 5 bolt lug patterns as well so I am attaching an article to show how to get the exact measurement for the right bolt pattern for your hub. Let me know what measurements you get and I can find a replacement hub for you.
(click to enlarge)
Product Page this Question was Asked From
Trailer Axle Beam with Easy Grease Spindles - 89" Long - 3,500 lbs
- Trailer Axles
- Leaf Spring Suspension
- Standard Grade
- No Hubs
- 3500 lbs
- Spindles Only
- 74 Inch Spring Center
- 89 Inch Hub Face
- No Drop or Lift
- etrailer
more information >
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Nick S.
11/13/2025
Hey John, were you able to get those spindle and bolt pattern measurements from your Lowe trailer? Once you have them, I can help you match the right hub and bearing kit. Let me know what you find so we can narrow it down.