Determining the Correct Replacement Axle Assembly for Haul Master Trailer


I own a Haul Master trailer with an axle capacity of 2000 lbs. I have enlarge the trailer and would like to replace the axle with a 3000-3500 axle. Would you have one available? if yes, what is the sku# Thank you


Expert Reply:

In order to recommend an axle assembly for you, I'll need some more information. First, you will need to ensure that the existing wheels and tires you are using are rated for the extra weight.

Do you need a brake or an idler axle? Keep in mind that different states have different thresholds at which trailer brakes are required. It is possible that with the 2K axle, you were under that threshold, but going up to a 3500 lb axle might place you above that threshold where brakes are required. Your state DOT or Highway Patrol/State Police should be able to provide guidance on this for you.

If your existing wheels and tires are rated for 3500 lbs, what is the wheel bolt pattern? I'll link you to a help article that explains how to determine this if you're not sure.

Do you need a straight or a drop spindle? Straight spindles are used when the bed of the trailer is over the tires or when low ground clearance isn't required. Drop spindles would be used on trailers that need a low deck height, like car haulers or livestock/horse trailers.

What is the hub face to hub face dimension? What is the spring seat center to center dimension (see diagram)? You can get these dimensions by measuring your existing axle.

For example, the # 35545I-EZ-89 Axle assembly you referenced has a 3500 lb capacity, uses idler hubs, a straight spindle, has a 5-on 4-1/2 bolt pattern, a hub-face-to-hub-face length of 89 inches and a spring-center-to-spring-center length of 74 inches.

Once I have all this information, I would be happy to recommend an axle for you.

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expert reply by:
Michael L

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