[Latitude 28]

Had the chance to preview an RV (not a Newell) with a family member looking to purchase.  The front tires happened to be smaller but the same manufacture as what we have on our Newell, albeit, made 30 weeks apart with a date code 1816 in the same year. The history of the previewed RV....stored outside, no wheel covers and used several time`s a year.   Our coach's history, that we acquired at the end of 2018 with the front tires date code of 4816.....the PO stored it outside 2017 & 2018 with no covers.  Once we owned the coach, we use it several times a year, stored it out side 2019 & 2020 with no covers then moved it inside late 2020 and I check tire pressures at least monthly and service accordingly.  Also I apply "303 Aerospace Protectant" to the tires monthly.  Take a look at these images of the previewed coach's tires....
       
And now our tires.....
       
Having said all this in order to get to my point of this post.  The difference, I believe, is the monthly application of 303 and servicing tires.  We are about to replace our front tires on the coach with a date code of 4816 with virtually no weather checking on the tires.  Needless to say the new tires will get the same treatment.

[kaptain]

Big difference, that's good to know. Thanks for the share.
Which 303 product did you use? the "303 Aerospace Protectant", or the "303 Graphene Nano Spray Coating", or some other 303?

[Latitude 28]

I use the "303 Aerospace Protectant".

[BusNit]

Thats a great comparison!