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What Size Axle Tube Does Spindle # TRU64FR Normally Use  

Updated 08/17/2026 | Published 08/09/2026

Question:

What size axle tube is generally used with this spindle?

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Expert Reply:

Hey Kyle, since the spindle part # TRU64FR is designed for a 3,500 lb axle the correct axle diameter it is designed to work with is 2-3/8 inch. Are you building an axle?

expert reply by:
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Jameson C
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Kyle

8/14/2026

Yes, building a custom length axle.

Jameson C. profile picture
Etrailer Expert

Jameson C.

8/17/2026

@Kyle Right on! what is the wall thickness you are going for? Worth mentioning is that axles have a slight bend built into them that faces downward to help with camber.

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