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Information Needed to Choose Correct Replacement Trailer Axle

Question:

I have a 20foot enclosed trailer that needs an axle. I have looked online at different axle but I am afraid I will choose the wrong one. What information do you need from me to ensure I get the correct axle.

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Expert Reply:

In order to determine the correct replacement axle, I'll need the following information:

-Inner and outer wheel bearing reference numbers or diameter of spindle where bearings ride. This measurement needs to be accurate to three decimal places, so using a digital caliper is the recommended way to measure. A ruler or measuring tape would be nowhere near accurate enough.

-Wheel bolt pattern (see linked FAQ article)
-Axle capacity
-Hub face to hub face distance
-Spring center to spring center dimension

(I've provided a diagram showing how to measure this.)

click to enlarge
expert reply by:
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Mike L

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