Suspension Kits for Different Tandem Axle Trailers

Question

Question:

Hello. Im looking for a tandem axle suspension kit for two trailers. 3.5k axles. Both have hangers with 1 at 4 center and 2.5 ends. The measurement between eye centers on one is 7.5 with links at 2.25 on center and the other is 8 with links at 3 on center. Do you have a kit that has those component sizes or should I piece together? If you need more measurements or details I can get them.

asked by: Richard M

0

Expert Reply:

Hi Richard, are you looking for replacement equalizers and shackle straps? Are the 7.5" and 8" measurements the width of your equalizers from center hole to center hole (measurement A in the attached picture)?

expert reply by: Robin H

0

Equalizer Measurements
(click to enlarge)

Richard M.

10/21/2025

Robin, Yes, I am looking for equalizers and straps. The 7.5" and 8" measurements are measurements for A in the image - center to center of the end holes. Thanks!

Robin H.

10/21/2025

@RichardM 7-3/4" like # TREQE1 is the closest we have for both of those equalizer measurements unless the 8" equalizer is a straight equalizer like # TREQR89. For 2-1/4" shackle straps you can use # TRSL225 and for what I imagine is probably 3-1/8" # TRSL313. If you want to upgrade to wet bolts, bronze bushings, and heavy duty shackles we also have complete kits which would be # MR46ZR for 2-1/4" and # MR76ZR for 3-1/8".

Richard M.

10/21/2025

@RobinH You had me double guessing my measurements, and I am glad you did. Went back out and remeasured with a straight edge instead of tape measure. Both are in fact 7 3/4" The 2-1/4" shackle strap measurement was right, and you are correct, the other set is 3-1/8". So all the parts you provided are perfect. Thank you!!!

Robin H.

10/21/2025

@RichardM glad to hear it! It is much better when it works out that way and you don't find out you have parts that aren't a common size.

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Suspension Kits for Different Tandem Axle Trailers

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