Look at it this way; 2 axles have a weight capacity of approx. 20 tons, and one axle is 10 ton, with air ride, the bags will flex better under higher individual load than a lighter one per bag (you following this?). The single axle will actually ride better, as long as you don't need 20 ton of capacity, which I doubt you need. Plus, it simplifies everything in the rear suspension dept. I hope this helps you.
Gary
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