Originally Posted by TexasSMB4x4
Plan is to get a 144 High Roof. Does it matter which payload to choose. 3160 seems to be the standard. But they offer a 5496. I don't really plan to tow. But does it matter as far as the buildout inside? Thanks.
The payload/towing rating is dependent on whether you have the 2500 which is SRW (single rear wheels) or the 3500 which is DRW (dual rear wheels-aka dually). The DRW requires a larger wheel well and does eat up more of your interior volume and has a modest affect on construction of your interior layout.
DRW offers more surface area and more traction when towing, and supports more weight on the rear axle. It floats better on fluffy snow, yet may hydroplane more easily on water. On packed snow or ice, the SRW will have more weight per square inch and depending on your tread type and whether you have studs, may get a better bite on the surface. DRW can be a problem going offload in that baseball sized rocks can jam between the two tires and rub enough to cause a blowout, though careful and frequent inspection can mitigate that possibility.