Tires for my travel trailer

Check the pressure rating of you rims as well as the weight specs. I'm not sure that a rim rated for 2600 lbs will be rated for 80PSI, which is the pressure you'd need for a load range "E" tire.

Buy some LR E tires. I'm not sure brand matters that much. I've had good luck with Marathon, Maxxis, and Towmax ST LR E tires.

The Maxxis D rated tire will work but why not go ahead and go to E rated tire. It's true you cannot gain any reserve on the wheels but having a better tire and running it at a PSI (see Maxxis chart) that corresponds or exceeds the rim rating can give you peace of mind. That is what I am doing currently

After trading in 2 RV's, I kept the Maxxis tires from the Minnie Winnie, but they don't fit on the Lance. So, I bought 5 new Maxxis tires for the Lance and can recommend them as sturdy tires!

No experience with the Marathons but there has been conflicting reports about their durability. We went with Maxxis after getting 3 years out of our Asian made stock tires. Our 32' TT weighs 10K# when fully loaded and we have had no issues with the Maxxis tires thus far.

Inspect the rear of your rig's wheel for max pressure stamp, sometimes you have to remove tire as some wheel manufacturers put that info on inside rim. I wanted to go up to LR E but found my wheel could not support the 80psi, no worries as the Maxxis LR D 15" ST tires are providing great service. We keep them at 65psi as ST tires perform better as max psi, if they are run too low they can suffer from overheating leading to catastrophic failure.

Maxxis ST tires can be difficult to locate locally but any reputable tire store should be able to order and have them in a few days. They can also be ordered on-line (we used DiscountTireDirect.com) and they were delivered to our front door in a couple of days via UPS. Went to our local Discount Tire and had them balanced, installed, and warranted.

There are no 10 ply load range D tires.

The Marathons were made in a ST225/75D15 (years ago) which is not a load range D tire. The D in front of the 15 is a bias ply tire designation. This has caused confusion before.

As one poster says your ST225/75-15 C load range is a 6 ply rated tire.

Also tires today don't come in actual ply numbers. Example is the E load range which is a 10 ply "rated". The C or a D or a E all have a two ply carcass. The 2 plies in the E is much thicker/stronger than the D and on down the letters.

The ST225/75-15 D at 65 psi and 2540 lbs will fit nicely in your wheels load and pressure capacities and give you a 17 percent load reserve above your old tires.

Trailers , unlike the truck, can have too much tire for best long term/cooler operation.

After installing a set of Maxxis ST tires on my fiver, I can highly recommend them.
Their ST225/75R15 Load Range D would work great on your TT. Don't forget to have them balanced and installing steel valve stems will add peace of mind.

Our trailer is about the same weight as yours, and uses the same size tire. We plan on changing them next spring around their 5th birthday. So far the Maxxis load range D are the front runner for us, but we will also look at the Goodyear G26 which seems to be getting a lot of mention on the various forums. It is a light truck tire approved for "all position" service and comes standard on a lot of the Sprinter style euro-vans. The are manufactured in Germany and France. Goodyear G26

aftermath wrote:
Go with the Ds. You are correct in making sure your rims will handle the tire and the dealer should be able to tell you. My gut reaction is that it will be OK. Someone here will know.

If those Marathons were original in 2008 then you got plenty of use out of them. As you know, the tread isn't the way to measure the life left in a trailer tire. I had a similar situation and changed over to Maxxi LRD and have been happy with them. My marathons came with the trailer and were showing signs of tread separation. Around 2008-2010 Goodyear was moving production around. First it was the USA then China and I think they might be back now but I haven't followed this lately. There were some bad tires out there but I don't think that is much of a concern now.

Whatever tire you get make sure it has a safety margin with weight, keep them pumped up to the sidewall max and watch them closely. Get a tire pressure monitoring system if you can swing it.

We purchased the camper used a year ago this week, they are the original tires that came with the trailer, the original owners only used the trailer for a few short trips in the 6 years they had it. We made several trips last year, I keep a close eye on my tires, I saw a few cracks after our last trip which is enough for me, they're 8 years old and time to be replaced. I saw where Marathons were made here then Canada and now China.
I always check my tire pressures before trips, one of these days a monitoring system might be in order.

I just need some good tires and appreciate all suggestions.

Whether the 10 ply tire is a load range D or E are there any issues with the stock rims? I'm not interested in having to purchase 5 new rims... I'm just looking to the best tire possible, I've seen the damage that happens from a blow out and I'd like to all that is possible to prevent it.