Need to replace the 5 year old tires on my TT and need some advice about upgrading. The trailer is 38 feet and has a GVWR of #9975 and currently has Load Range D tires from the trailer manufacturer. ...
Those numbers mean something. Many years ago, when I was upgrading from C to Ds, I found the chart online. I cannot remember the specifics, but I believe the number of "Js" matter on the PSI.