How to Identify Correct Replacement Bearings for Pontoon Boat Trailer

Question:

I have a 1983 pontoon trailer. One of the rear wheel bearings disintegrated on the interstate. I need install new races and bearings. The hub ID is 2.5inch and the axle stud OD is 1-1/16inch Is this standard sizing? I measured with a tape measure. Thank you for any information.

asked by: Shane S

Expert Reply:

The best way to choose the correct replacement bearings and races for the hubs on your pontoon boat trailer is to pull one hub and remove the inner and outer bearings. You should then be able to find their part numbers (please refer to the linked photo) to allow you to choose new ones. Or you may prefer to replace the entire hub with a hub kit that includes bearings and seals and that already has the races pressed into place.

While it is possible to measure the spindles and hub bore to find these parts this requires a precision digital caliper like # PTW80157; a tape measure or ruler is not precise enough. I suggest placing all wheels' bearings and seals, not just the damaged one.

The linked page displays all individual bearing parts as well as bearing kits like # BK2-100. If we do not have a kit with all your required parts you can still order them individually.

I also linked our page for hub assemblies. Simply click on your hub's inner and outer bearing numbers to then see hubs that will fit perfectly on your existing spindles.

I also linked two articles on trailer bearing replacement that may be of interest to you.

expert reply by: Adam R