Suspension Parts Needed for a Triple Axle Trailer

Updated 05/07/2026 | Published 05/05/2026

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Question:

Im rebuilding a 3 axle trailer with 7000 on axles. It need new breaks, suspension parts and bearings. What kind of information do you need to guide me to my best options?

asked by: Ruan S

Expert Reply:

Hey Ruan that sounds like a fun project. To replace your brakes, I'll need to know if you're needing disc brakes or drums. If you're replacing the hubs or rotors, I'll need to know your lug nut pattern and the part numbers stamped into the sides of the inner, outer bearings, and grease seal.

If they do not have numbers stamped into the side you'll need to measure one of your spindles using a digital caliper like item # PTW80157. I'll need the B, C, and D dimensions shown in the diagram below.

For replacement leaf springs, you'll need to measure one of your existing ones from the center to the center of the mounting bolts with the weight off of them. Leaf springs stretch out over years of use so this is the most accurate way to determine replacements. I'll also need to know how many leafs you want on the springs.

For new equalizers, shackle straps, and suspension bolts. I'll need the dimensions shown on the diagrams below.

What kind of trailer do you have?

You can add this information, along with any other questions you have, where it says Add Comment.

expert reply by: Jerred H