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Rockwell Axle

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If your rig yearns for a tire bigger than what the highway will allow, then you might want to check out a set of 2.5-ton Rockwells. Fitted with 6.72 gears from the factory and with a host of aftermarket support, these massive assemblies can usually be picked up for less than what you'd pay for a new set of Swampers, and will probably last a whole lot longer.