Hendrickson Trailer Suspension Systems launched a new, lighter weight Intraax AAT integrated trailer suspension system featuring the Large Diameter Axle (LDA).


The switch to LDA increases the outer diameter from today's 5-inch axle to 5-3/4 inches while slightly reducing the axle wall thickness. This reduction combined with the increased diameter creates a more efficient use of material, increasing axle strength while reducing weight. The new AAT LDA delivers as much as a 15 percent increase in bending and torsional stiffness compared to its 5-inch counterpart.

Since 2006, Hendrickson has used the 5-3/4 inch axle on its Intraax AANT 23K primary suspension. The integration of LDA on AAT 23K models allows customers to continue using a wide bushing pivot connection while enjoying a 19=pound weights savings over current 5-inch AAT 23K axle models.

To accommodate more robust applications, AAT 25K and 30K models will combine the LDA technology with a thicker axle wall for applications that require the higher 25,000-pound axle rating. This thicker axle wall combined with Hendrickson's patented axle-beam connection boasts a weight advantage of 30 pounds over current Intraax AAT 25K/30K.