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3.5k Boat Trailer Axle Assembly 73 in Hub Face 58 in Spring Center 5 on 4.5 Idler Hubs and 25 1/4 inch Leaf Springs

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3.5k Boat Trailer Axle Assembly 73 in Hub Face 58 in Spring Center 5 on 4.5 Idler Hubs and 25 1/4 inch Leaf Springs


(10x) Lug Nuts 1/2-20 Thread Zinc Plated Open Style [+$8.20]
(4x) Trailer Leaf Spring Shackle Steel 2 1/2 in Center [+$12.40]
(6x) Mounting Bolts Hard Steel 9/16 x 3 1/2 inch [+$28.68]
Price: $297.47
This item is out of stock

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  • Description

Replace the Axle, Leaf Springs, U Bolts, and hubs on your trailer all at the same time with this Full Trailer Axle Suspension Assembly.  The 73 inch Hub Face Trailer Axle has a standard 4 hole brake flange and comes with 25 ¼ inch Double Eye Leaf Springs pre-installed with zinc plated U Bolts and U Bolt Plates.  This Painted Steel Axle Kit also features 5 lug (4 ½ inch bolt pattern) Standard Hubs and a 4 Hole Brake Flange so you can install Trailer Disc Brakes to it if needed.  This assembly includes everything except the Leaf Spring Shackles and Leaf Spring Mounting Bolts.  You may also need New Trailer Lug Nuts to complete the project.

 Typically, replacing all the parts on your trailer together like this is difficult to do, and many measurements need to be taken in order to order the correct parts, which need to be sourced individually.  There are some common measurements in the trailer industry though, and these Axle Kits are made with the most common sized parts in mind.  This doesn't mean the Complete Trailer Axle Kit will fit your trailer though, you would need to take measurements from your trailer and compare them to the specifications below in order to guarantee that the parts in this assembly will fit your trailer frame.  If you plan to replace your leaf spring mounting brackets as well, our Single Axle Leaf Spring Slider and Tandem Axle Leaf Spring Slider could make the whole project a lot easier.  Please check all measurements and call or email us with any questions before placing your order.

3,500lb. Trailer Axle Specs:

3,500 lb. Capacity

73 inch Hub Face

58 inch Spring Centers (This measurement must match your current axles Spring Center Precisely in order to guarantee fitment)

2 3/8 inch Diameter Axle Tubing (Painted steel)


Accu Lube / Posi Lube Greasable Spindles

Standard 4-Hole Brake Flange for installing Trailer Disc Brakes Brakes


Painted Steel Hub Specs

5 bolt 4.5 inch Bolt Spacing

1 3/8 inch inner bearing size (68149) x 1 1/16 inch outer bearing size (44649)

1.98 inch Dust Accu Lube Dust Cap with a Removable Plug to access the grease Zerk on the Axle

1.72 inch seal

Lug Nuts Not Included


Leaf Spring Specifications

25 1/4 inch Double-Eye Spring

9/16 x 11/16 Spring Bushing (Included)

Requires (2) 9/16 inch Diameter Spring Bolt (Not included)

1,750lb capacity Each, 4 Leaf-Spring

Underslung with Zinc Plated U Bolts

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