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Originally Posted by DocMike
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Can the GVWR be increased with aftermarket suspension mods?
Doc
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Most suspension modifications actually add to the "Gross Vehicle Weight", and since legally you keep same maximum "Rating", the useful load carrying capacity is reduced.
Whether it's a steering "stabilizer" or heavier sway bars, these add weight to motorhome (albeit not much) that reduce load carrying capacity.
There must be a way to legally re-certify a chassis to a higher GVWR, but I don't know how complicated and expensive that would get. I expect it's not practical for us as owners. I know large businesses do it though.