My 5th wheel RV came with G/Y- 16”, G-159 load range “G” all steel tires. (Even the sidewalls are steel cord)
I understand that they have been discontinued and have been replaced with the G614RST or the 647RSA tire. After 4 ½ years the G-159s look almost new, no flats or bubbles etc. and we travel a lot.
Don’t have any experience with the replacements. Why don’t you check out the Goodyear site?
Richard