View Full Version : towing tires: help the blonde girl out!

Mar. 23, 2011, 02:12 PM
Okay, I have a 97 Expedition 4WD P255/70R16 sized tires on, and I bought this truck (has the 5.4 with delux tow, rated to tow 8000) to tow my horse trailer and 1 horse. With trailer fully stocked, with horse, people, and stuff, plus the curb weight of my truck i'm looking at a total weight of 7800#

Obviously P rated needs to go, and they have some signs of dry rot, so they are gone.

The "tire guys' have told me my options are:
1.In a 255 size I can do a D rated tire and get 8ply
2. or I can do a 245 which is skinnier in an E rated 10ply
3. or I can do a 265 with is a BIGGER tire all around in an E rated 10 ply

I've got about 3.5" from the front of my front tire to my bumper, and 8" from the top of my tire to the bottom of the fender

vehicle gets used only with the trailer attached and we show monthly about 40 minutes away, trail monthly about 30 minutes away, and clinic bi-yearly about 6 hours away.

which tire? Please don't let me fall victim to sleezy tire guys :)

Mar. 23, 2011, 02:32 PM
My tire guys (not sleezy) and my hubby (not sleezy either :lol:) all agree...E rated tires. Even though you are really not towing that large of a load, there is a lot of stress on tires when you hit unexpected road hazards. And I can't think of much I'd like less than a flat/blowout on either towing vehicle or trailer. I know E rated are more expensive, but I have always felt worth it.

As for skinny vs "big" tires. I don't know where you live, but when pulling through heavy wet snow, skinny is less resistance.

Mar. 23, 2011, 08:39 PM
I am a truck and trailer specialist. Your truck came from the factory with the p-metric ( 4 ply ) tires on it, which means you trucks weight carrying capacity was set by the manufacturer with the 4 ply tires. If you want to go the extra, stay the same size, but go to the 8 ply. I pull everything under the sun with my truck ( horse trl., tractors, hay ) with 4 ply tires at any distance and at any speed with no problems at all. I own a tire store and could have put anything on my truck, and still chose the 4 plys. Your choice, but you would be fine either way.

By Tasia's SO

Mar. 23, 2011, 11:58 PM
I would stay with the OEM size, a P255/70/16 is not and never was a car tire no matter the "P" designation. There is simply no reason you need a 10 ply (or 8 ply for that matter) on a 1/2 ton suv. Tires in that size will be rated as an XL and can be run at ~44 psi, more or less making it a '5 1/2 ply'. The capacity is almost 2300 lbs each, x4 is over 9000 lbs. What's your GVWR? About 7200 lbs if I had to guess. So unless you plan on exceeding the cargo capacity of your suv by over a ton........

Your ride, mpg, and pocket book will suffer, you will gain nothing.

Mar. 24, 2011, 01:10 AM
the P255's on it now have deteriorated half way through their mileage warranty (they are at 4 years, and 35000 miles) and they are michelins. I've only owned the truck a few months. Before I had it, it took a few long trips hauling a "stuff" trailer, and was the weekly grocery vehicle. They are saggy looking too even when inflated to the proper PSI. I'm wondering if the saggy tire is killing my mpg to be honest.
I really don't trust sticking with a P rated tire.
The price difference from P to D ($100) to E ($50) for the whole set out the door, so I'm not sure I'm really going bonkers money wise. I'm sure the E's are a heavier tire so I may be trading saggy mpg, for heavy mpg.

I'm visiting all the tires in person tomorrow.

I have a question: When a vehicle hitch shows the towing capacity, does that weight include the curb weight of the truck? google hasn't helped... just wondering if I can put a second horse on my trailer without killing my transmission.