Just ordered 40x13.5x17 toyo open country mt's and they are c-rated but have a load rating of 3200lbs at 35psi not sure what to do currently have 37's but they are E rated. I have f350 v10 crew cab and don't tow/haul.

 

do the math 3200 x 4 =12,800....your truck is probably around 6600.....that's a big tire and 35 psi on those is a lot of air I don't see an issue

 

and them toyo mts are a tough a** tire have 35`s on my f250 they don't wear out

 

Yes, the tire you purchased is load range C....but, they are rate at 3195 pounds at 35 PSI. That is roughly equal to the load rating of the factory tires, so you should be OK.

 

I agree with Stuart and CuNmUd, those tires are rated for more than enough to safely carry your truck. Load ranges can be misleading, at the end of the day the weight rating of the tire is what determines whether or not it's safe to mount.

Make sure to NOT exceed 35 PSI with those things though. You have a much wider footprint than the stock size, so they don't need nearly as much pressure as stock tires to carry the same weight.

 

Larger tires change the rating system but the truck size doesn't match the tire size, so they are fine. The max pressure is where that tire is the strongest so putting more air in that tire is like putting more than 80 lbs in my E rated.......don't do it.

 

Thank you everyone for the fast replys, I only saw load rating when I ordered them (3195) and went by that. These toyo's also have the 3ply sidewall that my 37" toyo E rated have.

 

some pics of them on the truck would be really nice

 

Well, he could do it................once anyway.

 

My only question would be a legality one, if he is in a accident can that be used against him, it says right on the door sticker load range E , It is kinda like going over your weight's that are posted on the door pilar sticker, those are the legal weights your truck can carry with E rated tires..

 

It would never hold water. The total load bearing numbers are way above the trucks' weight. Any lawyer would quickly override the sticker figure.

 

All depends on who has the better lawyer maybe

 

Whenever you deviate from stock specs you risk becoming liable for a safety hazard. The sticker doesn't just state the load range of the tires, but the size as well. For example the OP could be liable for rear ending someone because someone makes the argument that the factory brakes aren't adequate to stop tires that large.

As Brent said, the tires are rated for the weight of the truck. There's no issue there.

 

An 18 year old wannabe lawyer student could beat that one.

 

Not so sure about that , you are taking a tire with a 6ply load range C rating putting it on a 7500 pound truck that requires a 10ply E rated tire and thinking all is dandy, My wifes car has load range C tires on it and believe me I would not put them on my Superduty no matter what the weight rating is, When he is pulling a nice heavy load and one of the C tires self destructs from to much heat injuring or killing someone your 18 year old lawyer is gonna get his *** handed to him...