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How to Determine Correct Replacement Hub & Drum For Magic Tilt Boat Trailer

Question:

Hello, I have a Magic Trail by Magic Tilt Trailer, Model TSB 2224W, which I think most closely translates to the current TSBV 2224W model. It has 13 inch wheels with a 5 bolt 4.5 inch pattern. Assuming the axles are original, they are rated for 2630 pounds each. The round portion sticking of the the square portion of the axle is 1.75 inch in diameter. For the purposes of mating to a hub and drum assembly what should I be looking for? Something that mates to a 2000, or a 3500 pound axle? Something with a particular diameter seal? A particular seal number? Im ok oversizing the brake system, assuming everything works together. Assuming I get the hub and drum assembly figured out, can I mate it with any hydraulic break kit that matches the drum diameter, that matches the 4 bolt 2-3/4 mounting flange that I have? Thanks!

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Expert Reply:

Thank you for that info, and I can help you out with how to determine the correct hubs for your Magic Tilt boat trailer. You were correct that you do need to find a specific part, which are the bearings as well as grease seal, since you already have the bolt pattern figured out.

So, you will need to take apart your current hub assembly and look at the bearings themselves; wipe away the grease and you should be able to see the part number stamped directly on them. If you are unable to find them, you need to use a digital caliper like # 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.

It sounds to me from your info like you have a #84 spindle and that would be a 3,500 lb hub and drum, but you do need to verify. For example, if your inner bearing was # L68149 (1.378" inner diameter) and outer bearing was # L44649 (1.063" inner diameter) with a grease seal inner diameter of 1.719" you would need the Trailer Hub and Drum Assembly # AKHD-545-35-K.

This is a 10" drum, and so long as your brake flange mounting holes measured 2-7/8" apart center on center you could use standard hydraulic brakes such as the Hydraulic Trailer Brake Kit # AKFBBRK-35 with Mounting Hardware # BRKH10B.

If you let me know your bearing numbers, or the measurements where the bearings and seal ride, I can try and find the right hub and drum for you. I've also added a link below to our available hub and drums with a 5 on 4-1/2" bolt pattern.

Where to Measure Spindle to Find Bearings
Where to Measure Spindle to Find Bearings
(click to enlarge)
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Kyle S

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