I'll start off by saying that currently there are no SumoSprings that have been confirmed to fit on the 2021 Thor Chateau 27R, so that's why there are not any showing up in our fit guide for your coach. However, the Timbren # TFEF350UH and # TFERSDLB are a good choice that will provide the same functionality and perform comparably. The Timbrens are also a progressively strengthening spring like the Sumo Springs in that they get stiffer as loads are applied to them; they also provide the... view full answer...
Your 2017 Thor Chateau 31W was built on a Ford E-Series van chassis. In our fit guide that would be the cutaway model. I have linked the mud flaps we have listed for that style vehicle but it is possible that some, such as # A4000570, may not fit due to the body design of the RV. Others in the list are meant to attach to a hitch receiver so if your RV has a trailer hitch one of those options, such as # AD100001, could work. We do not have an option that is a direct factory replacement though. view full answer...
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