Continuing our discussion of RV trailer tires, RV Roamer offered up:
"I'm guessing your tires are in the 1400-1500 lb range and it should not be difficult to find a 205 radial that will carry 1400-1500 lbs. But maybe I am underestimating what you now have...might be as high as 1850 lbs."
My 205/75R15C's are rated 1820 lbs. This seems (to me) to cut things pretty thin! See if you agree with my math: My TT's rated gross weight (which I'm assuming is the trailer, water, and all my stuff) is 6000#. Assuming 15% of that is on my kingpin, that leaves 5100# to be shared among my four tires, or 1275# per tire. (TT has tandem axles). That leaves about a 43% reserve to handle impacts, cornering loads, etc. Probably enough, but certainly not an excessive safety margin.
As for the other poster's comment that ten years is a pretty good endorsement for the Goodyear Marathons, I can only respond, "Maybe so, maybe not!" We bought the TT last summer, and it looked like it had hardly ever been used. The interior is like new. I think it spent most of its time in storage. We were really looking for something newer, but when we saw the condition of this unit, its price was just too good to pass up. We've already made a 1200 mile trip on the old tires, not knowing that we were really treading on thin ice. (Ignorance is bliss, we hadn't hooked up with this forum yet, so we took off down the road, fat, dumb, and happy with ten year old tires and a truck radiator that was about 90% blocked)
Lady luck was smiling, and we completed the trip without incident, other than a truck that ran kinda warm!
Thanks for the reply, and for the info that Cooper makes ST tires. They've got a distribution center local to me, so I'll check on their offerings. I really appreciate all the info I've been able to glean from this forum. There's a wealth if info available here, and it's pretty easy to see who's "shooting from the hip" and who's "been there, done that"
Thanks again, folks
John is SW Ohio