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Recommended U-Bolts for a 3" Diameter Axle  

Updated 11/08/2026 | Published 11/07/2026

Question:

WHAT U BOLTS DO I NEED FOR TX45RJ SPRING

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Expert Reply:

Welcome back Tracy. The MORryde U-Bolts item # MR66ZR would be the correct ones to install the Terran Industries 5-Leaf Double Eye Spring item # TX45RJ. That 2,950 lbs leaf spring is designed for 3" diameter axles.

The MORryde item # MR66ZR includes four 1/2" diameter U-Bolts designed to mount a 3" diameter 5,200 lbs - 7,000 lbs trailer axle. The U-Bolts are 7-3/4" and include four nuts. For installation they should be torqued to 45-70 ft-lbs, and then have the torque rechecked after the first trip.

If you are unable to reuse your existing tie plates, you'll also want to pick up the U-Bolt Plate item # CES95FR. These are sold individually so you'll need two per axle.

What kind of trailer do you have and what do you haul with it? Feel free to answer this and throw in any other questions you have, where it says Add Comment.

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MR66ZR
MR66ZR
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MR66ZR
MR66ZR
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