3.5k Idler Axle Kit w/ 12" Tires and White Spoke Wheels

$259.99 - $359.99
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Thinking about building a trailer? Need to replace the axles tires and wheels on your current trailer? Check out this 3.5k Trailer Axle Tire Wheel Kit. This trailer kit comes with one 3500 lbs trailer axle, two tires and wheels, two double eye springs, one u bolt kit, and a single trailer axle hanger kit. This kit provides all necessary parts to replace your trailer axle, trailer suspension, and trailer tires and wheels. 


Kit includes: 

(1) 3,500 lbs. Trailer Axle with 5 lug Idler Hubs installed on axle.

(2) 4 leaf 1-¾” wide double eye springs, 

(2) 2-3/8” U-bolt kit (1 kit per axle), 

(1) Single Axle hanger kit (includes all the weld on hangers, spring bolts and nuts.) 

(2) 12" Tires & White Spoke Wheels Mounted

Select from the options above to get what you need today. If you do not see the option you need, give us a call, or fill out a custom axle order form, email or fax it to us for a quote.

Axle Order Form



 Axle Brand: Rockwell American

Country Assembled:  The U.S.A.

Capacity Per Axle (LBS): 3,500

Stud Size: 1/2"

Hubs/drums: 5 Lug Drums

Spindles: #84

Spindle Size: 1-1/16"

Axle Tubing Diameter (Inch): 2 3/8"

Axle Tubing Thickness: .180"

Lubrication: EZ-Grease Zerks in Spindles

Spring Pads: Welded on Axle

Brake: no brakes 


Hubs: 5 lug idler hubs installed on axles.

Brake Flange: 4 Bolt Welded on Axle

Pre-Greased: Yes

Inner Bearing: L68149

Outer Bearing: L44649

Suspension: Leaf Spring

Cambered: Yes

Under-slung: Yes (the axle sits on top of the springs)



Bearing, Race, and Seal Information:


Inner Bearing - L68149

Outer Bearing: L44649

Seal: 10-19 EZ-Lube:

1.719" Inner Diameter.

2.565" Outer diameter.


Inner Race: L68111


Grease Cap:

1.98' Outer Diameter - EZ-Lube with Rubber Plug

Spindle: EZ Lube




Tire & Wheel Specs:


Tire Size= 4.80-12

Tire Ply Rating= 6 Ply / Load Range C 

Tire Load Capacity= 990 lbs 

Max PSI= 90 lbs 

Tire Width= 4-3/4”

Tire Diameter= 20-1/2”

Tire Season= All-Season

Wheel Size= 12” x 4” 

Bolt Pattern= 5 on 4.5" 

Wheel Finish= White

Center Hole Diameter.= 2.95" 

Wheel Offset= 0 mm




Spring Specs:

4 Leaf 1-3/4" Wide Double Eye Spring 1.75k Cap. 25-1/4" Eye to Eye.

Spring Type: Double Eye

Capacity per spring: 1,750 lbs

Leaves: 4

Dimensions: 25.25" Length x 1.75" Height

Eye Dimension: 9/16"

Arch Height: 3.25"

This Trailer Axle Spring is the most commonly used leaf spring on 3.5k axles. 

90% of trailer manufacturers use this spring when building light duty utility trailers.

U-Bolt Kit Specs:

3.5K U-Bolt Kit for 2-3/8" Round Tubing Axles 3500 lb axles

1 U-Bolt Kit includes all the u-bolts, nuts and tie plates for one axle.


(4) 7/16"-20 x 2-3/8" x 5-1/2" U-Bolts

(8) Nuts

(2) Tie Plates for 1-3/4" wide Double Eye leaf springs


Hanger Kit Specs:


(2) 1.44" Tall front hangers,

(2) 1.5" Tall Rear Hangers with bushing,

(4) 3 1/8" Shackle Links

(6) 9/16” x 3”-18 Shackle Bolts

(6) 9/16” Lock Nuts


How to Determine what axle you need:

If your building a trailer from scratch then you do not have to worry about measuring anything. Just pick the width of axle you would like

Hub Face (HF):

Refers to the length of the axle measured from the base of one wheel stud to the base of the wheel stud on the opposite side of the axle.

(where the studs protrude out from the hub or where the two wheels butt up to each other)

(when hubs are mounted on the beam).

You can measure from one hub where the studs start on the drum, to the hub on the other side of the axle.

You can also get this by measuring from where the two wheels butt together on one side of the axle to where the two wheels but up together on the

other side of the axle. (This measurement is important but not a deal breaker if its a inch or so different than what we show)

Spring Center (SC):

is the approximate width of your trailer. It is measured from the center of the spring seat on one side of the axle to the center of the seat on the other.

This axle beam comes with the spring seats welded on.

The easiest way to measure this is to have a friend help you. Have your friend hold the tape measure in the center of one spring one the axle while

you pull the tape measure down the same axle to the other side of the axle to the center of the other spring on the same axle.

This will give you your (SC) or Spring Center Measurement.

If your like myself and do not have many friends to help you out. The easiest way to measure when by yourself is:

Hook the tape measure on the outside of one spring, pull down the axle to the inside of the other spring on the axle axle.

This will also give you your (sc) or Spring Center measurement.

(This measurement is the most important measurement to get, so please double and triple check your measurement)