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How To Determine The Axle Capacity of a 2007 Rockwood Camper


I have torsion axles on my trailer the dry weight is approximately 6900lbs .Once i put water in holding tanks and propane im over 7000lbs easily.I believe them to be 3500 lb axles due to them having a 5 lug hub.Am i right in assuming this.


Expert Reply:

I do have a few options for you in order to help you determine your axle capacity but I would not assume this based on the 5 lug hubs. The reason for this is that 5 lug hubs, 5 on 4-1/2" in particular can be used on anything from a 2,000 lb to 4,000 lb axle. The best way to determine the weight capacity of a torsion axle is to look for a tag or sticker on the center that lists the serial number. If you have the serial number you can then call the manufacturer as they would be able to give you the axle capacity. The most common axle manufacturers for trailers are Dexter, Lippert, and AL-KO.

If there is no tag or sticker on the center of the axle beam then the next best option I have for you is pull the hubs apart and look at the bearing numbers or if not legible, measure the spindle where they ride. We have a help article that shows how this is done which I have attached for you. For example, if you do have a 3,500 lb axle then odds are the inner bearing is an L68149 and the outer bearing is an L44649.

Please note that the combined weight of both axles does not need to be rated for the gross vehicle weight rating of the trailer as the vehicle will carry some of this weight on its tongue, around 10-20%.

expert reply by:
Conner L

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