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How to Determine Correct Hub for Boat Trailer With 3,500 lb Axle


Hi, I have a boat trailer that I need to replace the wheel hub and bearing assembly the wheel flew off while driving down the road - and we could not find the tire. I need to fix it, and I have the sticker information from the trailer trailer was bought new with the boat in 2004, but cannot find information on what parts to buy. Manufactured by: Magnum Custom Trailer MFG. MFRd Date: 5-20-2004 - Year: 2004 - Vehicle Class: II Blue Wave GVWR: 1588 KG 3500 LB - Model: 2800 Tires: ST215/75R14 LRC - Rims: 14x6 JJ Carrying Cap.: 1257/2770 190 Classic VIN: 1V5AA201941283179 TYPE: Trailer


Helpful Expert Reply:

It's pretty scary to have a wheel fly off, but there is an easy way to determine the correct replacement hub assembly. What you can do is either remove your remaining hub and look at the bearings themselves; wipe away the grease and you should be able to see the part number stamped directly on them. Or, you can use Digital Caliper # 301-17068 and measure your spindle to the thousandths of an inch where the bearings and grease seal ride. You can use the photo I've attached to see exactly where you need to measure. You can use that information to determine the correct hub.

For example, the most common bearings for a 3,500 lb axle will be inner bearing # L68149 (1.378" inner diameter), outer bearing # L44649 (1.063" inner diameter) and grease seal # 58846 (1.719" inner diameter). If you have these bearings and grease seal you could use the Trailer Idler Hub Assembly for 3,500-lb Axles - Galvanized # AKIHUB-545-35-G-K which has a 5 on 4-1/2" bolt pattern.

You could then mount a wheel and tire such as the Karrier ST215/75R14 Radial Trailer Tire with 14" Galvanized Wheel - 5 on 4-1/2 - Load Range C # AM32182 which is the same size as your original tires and has the correct bolt pattern to fit this hub.

I have added a link to video reviews as well as our entire selection of hubs and tires and wheels for you. Or if you get back to me with your spindle dimensions or bearing numbers I can help find the right parts for you.

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helpful expert reply by:
Kyle S

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