acadianbob

These are all true statements. LR C is a compromise that some may find acceptable vs LR E "10 ply" . I do get less bounce and sway when towing with LR C vs P metrics. It all depends on preference and how much heavy towing you do. LR C gives us better towing ride and harsher "everyday" ride.

matman72703

Just had BFG 285/70/18 KO2s put on my 2014 XLT SuperCrew. Can I just say they are great! Tech at sam's club only wanted to put 35 psi in. Based on load inflation tables and reading the forums, I knew that was too low. Called BFG and they said 50 psi is what I need which jives with the load inflation tables. Will do a chalk test to verify dialed in psi.

Size was a little bigger than OEM. Speedometer seems to be 2 mph off at 75. Odometer is 4% off based on GPS. MPG does not seem worse, possibly better given the 4% odometer error.

Road noise is minimal if not the same as the Goodyear SR-A.

Ride is a little stiffer but is comfortable and handling feels better to me.

Love them!

clearnetedm

I found this a while ago that seemed to help, as I to am looking to move from P to E LT tires.
Page 11 helped for me. Basically find your current tire in the spreadsheet under the right psi as per your door jam. Take that weight and divide by 1.1. Take that new number and find it on your new tire and look at the PSI. Always round up. In my case I should be at 50 PSI. Granted it's only in 5PSI increments so it could be 47.

Harleydavidson19

It is amazing so many of us go to the same chain of stores to buy tires and each place has different recommendation on setting psi. I just had a set of KO2s 275/60/20 on '13 fx4 installed with fuel wheels and DT told me 40 psi while the guy at consumer services for BF/Michelin/uniroyal recomended 45psi. For now at 40. We will see after a week i will bump to 45 and test.

Feathermerchant

We had a minivan that had 35 psi max tires on it from the factory. I think the recommended pressure was about 30 psi. When I replaced them at Discount tire, the new tires were the same size mfr and load rating but had a max inflation pressure of 51 psi. Discount wanted to use the same 30 psi as from the factory. When I pointed out the difference in max pressure, they had no idea if that changed anything or not.
They are supposed to be the experts.

Stu Cazzo

How much are you towing and how off road do you go?
I refused to put LT tires on my truck as they ride like a tank, weigh more, and decrease fuel mileage (although now who gives a ****).
Mostly for ride quality... I tow 5000# easy and go off road with a set of General Grabber AT2 in a P rating. Goes through snow insanely well, off roads very well and gives a very smooth ride in a P rating.

11screw50

Just understand that page 11 is specific to the size tire listed and not to every Lt of the same load range. You really want to find your tire size in the table that starts on page 22. (For example, a 285/55r20 at 50 psi is rated nearly the same as a 275/55r20 at 55 psi)

FWIW, this is the same document that I used when I put Toyos on my last truck. The guy at the tire shop actually argued with me about it until another guy came over and asked what pressure I wanted and went to tell the guy dong the install. I looked at the first guy and told him that is how customer service is done...not arguing with the customer. Heck, I had even offered to sign the paperwork stating what pressure I wanted. (I am an engineer, I had done my research and had run my own calculations prior to finding that nice chart).


Some of us don't mind the difference in ride. And while I do not tow a ton, when I do tow, it is worth it to me to have a tire that performs the job better. Unfortunately, I'm not finding many options for LT's for my 20's in the sizes I want (either stock 275/55r20 or 285/55r20) so I may end up with a P rated tire (but an XL variant) when I replace the stock tires in 15-18 months. Meantime, I'll be keeping my towing trips short.

maco

Mike you are definitely on the right track with your pressures.. I also run E rated tires @ 55lbs...I don't tow but my truck weight is a little above the 2650 lbs...I drive commercially & switched to the "E" rated tires as a safety thought of running my weighted truck all day long @ highway speeds...Also as others suggested increase the tire pressure as your weight increases...As an ex mechanic & tire tech. I have ALWAYS run my tires 3-4 lbs over the door sticker number...it dose create a harder ride that personally I really couldn't tell the difference from.... but I think I got more mileage out of my tires....I also have had tire shops & oil change places refuse to put in anything over the door sticker number...I just tell them then u can't work on my truck.....Keep up the fight!!

larry2c

Well, this has certainly been an enlightening thread. The guy I bought my '11 FX4 from had just put 275/70R18 KO2's on the truck before he sold it to me. I guess that either the tire shop or the PO put the tire pressure at what was on the door sticker - 35 psi. I bumped that up to 40 psi the day after I got home on just a gut feeling that it should be higher.

Now it looks like I have a semester of reading and math to do to figure out what the real correct pressure should be. Thanks to clearnetedm for the tire psi document - now I just need to figure it all out

mass-hole

I even found on my 275/60R20 Wrangler Duratracs(Not E rated or LT's) that they were not riding right at 35psi. I went to 40 and it took the squishiness out of them.