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Stock trailer suspension has very little give, which means every pothole and expansion joint gets transmitted straight into your trailer's frame and cabinets. The AllTrek 4000 swaps in a rubber-cushion equalizer setup with a full 4 inches of suspension travel to absorb that impact before it reaches the rest of the rig.
It's a direct upgrade for tandem-axle trailers looking to cut down on road shock without a full axle swap.
