[Padgett]

A lot of mixed thinking here. First is that mine towed nicely on the stock 215x75x14 LRC at 65. At the same time I felt that a 1820 lb tire on a (potentially) 4000 lb trailer was overloaded. My TV is 4475 lbs and has tires rated at 2200 lbs each. In theory two could hold the whole car (and I used to figure pressures that way when autocrossing). However that is 2200 lbs at 51 psi and the recommended inflation is 33 psi. Linear math (CEFGW) give the load per tire at that pressure to be 1425 lbs or 5700 lbs (car plus 1200 lbs). Sticker on car shows that tire and pressure to be good for a gross weight of 6500 lbs. Also while the 4475 lbs is almost 50-50 the GAWR Front is 3200 lbs and rear 3700 lbs (towing package).

Note: you really need the tire load chart for that specific tire to be exact but few thing are and why I run the heep at 36 psi instead of 33. If the load is increased, I would increase the pressure to match.

OK back to the TM. My 2720SL (seems to be the most common size) has a chart on the sink cabinet door with rated weights (see below). It also has an odd double inflation sticker (have never seen one like this before & suspect there may have been an issue.

Put them together and it seems evident that the stock 14" LRC is at the limit of its capacity. Not good.

At the same time I really do not like to raise the CG on anything. Posts indicate that some modes can sway though whether overloading or underinflation is an issue I do not know. Can say mine felt quite stable at 65ish mph even when being passed by semis do 70+. OTOH it weighs about 1000 lbs more than my previous tow car, a minivan.

Back to the TM. Every trailer I have had before rated over 4,000 lbs was a tandem axle so a single axle is new to me. Have had tires blow and once had the whole neck snap off a race car trailer at 70 (interesting experience but did get to drive an A/SR to the next exit...)

OK, the weight rating (both places) is for a 4200 lb max and likely 3800 lbs normal. Take off 400 lbs for the tongue and that leaves about 3400 lbs typ. or 1700 lbs load per tire so long as your companion does not pull a Lucy (see here ).

OK so looking for a standard trailer tire with a max load of at least 4200/2 = 2100 lbs and a diameter close to the stock 215/75R14 LRC 26.7" I found a 205/75R15 LRD rated at 2150 lbs @ 65 psi and with 1/4" less wheel well clearance (1/2" larger diameter). I'll probably run at that pressure and maybe put a g-meter in the coach to record shocks.

Few more notes:
1) This tire must have at least a 6" rim (is marked on the wheel somewhere). 5" rims may not have the load capacity.
2) Loads are for ST (trailer) and LT (light truck) tires, P-metric (passenger car) should be derated 20% on load.
3) Trailer tires should have a nylon overlay (not cap) for added strength and heat resistance.
4) I carry an IR heat gun (HF 93984 or 60725 and will check the tire and bearing temperature at stops on the road. They are handy for all kinds of things.
5) Any tire with an "ST" in its name or destription is a trailer tire and only rated for 65 mph.

Suppose this should be in a FAQ but this seemed the right combination for my needs. YMMV.