Maxxis has a E rated in 15 inch:
http://www.maxxis.com/trailer/traile...nflation-chart
I replaced the Towmax on our previous Cougar with them, and had no problem for a year. That may save you the expense of replacing wheels. And go with steel valve stems.
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2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
2023 CanAm Defender SXS
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