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How to Determine The Weight Capacity of a 3 inch Diameter Axle


Im building an 18ft tandem trailer from what I was told are the axels,springs,rims,etc from a mid1970s RV trailer axel tube od is 3inc hes can you help me find capacity?


Expert Reply:

Three inch diameter axles could have a weight capacity as low as 3500 lbs and as high as 7200 lbs. For your situation the best way to determine your axle weight capacity is by using the part numbers of the inner and outer bearings in the hub.

I attached a photo that shows you where you can locate the part number on your bearings. With this information we can give you a more accurate weight capacity.

click to enlarge
expert reply by:
Jeffrey L

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