Tires with Nylon cap ply over the steel are probably better than tires without. You will need to confirm by reading the tire sidewall as this information is not always included in the advertising or sales literature.
If they say 'Nylon" in addition to 2 ply of steel in the tread, then by law it has to be there.
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Retired Tire Design Engineer (40 years). I write a blog on RV tire applications www.RVTireSafety.NET and give seminars on RV tire application across the US. Serve on Technical Advisory Panel for FMCA. I am scheduled to give seminars on Genealogy and RV Tire Safety in Sept at FMCA in Redmond, OR on 18 - 21.
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