There are many trailer manufacturers that build triple torsion axles with great success and reliability. Generally these manufacturers “down rate” the axle capacity to cover the shock loads that the trailer may experience. Tie Down Engineering and other major axle manufacturers do not recommend triple torsion axle applications without thought to load balance and shock loads. Torsion axles are totally independent and are not equalized like a typical leaf spring set of axles. Torsion axles have many benefits over spring axles but they do not have the ability to transfer loads from one axle to another as in a spring axle set that has equalizers between the spring mounts. The entire load of the trailer can be put on one torsion axle when hitting a pothole, curb, uneven surface, railroad tracks or speed bumps. Rear axles can experience overload on boat ramps where a rear tire drops off the end of the ramp and the full load of a wet boat and tow vehicle is placed on the one axle. The weight transfer can be exaggerated even more if the trailer is not towed level. Even though the overload may be short lived, it isn’t reasonable to expect one axle to carry the entire load of three axles when these conditions occur.
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