WayneAt63044 wrote:
If a person doesn't trust the remaining 3 tires, why would you save one for a spare? Buy 5 new tires.
For my use the spare is used to get me to the next tire shop to fix or replaced the ruined tire that was on the trailers axles.
Using a quality tire on the trailers axles means the spare may hang for many years before or even if its ever needed.
op wrote:
I assume the stock tires, Castle Rock ST205/75R14, 8PR load range, D105/101L, are fairly cheap tires? I think maybe they are only 6 ply tires as it says 2 ply tread, 2 wire ply and 2 sidewall ply.
The 8pr (8 ply rated) is the "ply rating" (not actual number of plies). The tire has 2 sidewall plies which is the number of carcass plies but is equivalent in strength to the old tires of years gone with actual 8 plies.
Castle Rock tires ??
Not the best tire for cruising 8k-10k miles a year with lots of all day runs at interstate speeds.
Myself I would sell them to some one with a lawn service trailer and go with a Provider ST or the Endurance ST.
Years back I ran LT tires on my non rv trailers. We had lots of 14" sizes available but their all history now.