So I am looking into getting some all terrains for better mileage and snow/ice performance verses the mud terrains. I am stuggling with the load range rating though. My truck is a 1 ton and I dont want to lose capacity however most of the 37 tires (procomp and bfg) are only "d" rated. I dont understand because some of them have higher weight ratings over the "E". For example the D's have 35**lbs and the E's have only 3000. Whats the deal. Can i get by with a D rating as long as it has the 3500# rating? I cant imagine I will ever have more then 7000 lbs on the rear axle with a bumper pull trailer. Am I just confused?

Thanks

Avram

 

The load range d's may have a higher load rateing than the e's but they cant be inflated to the same tire pressure as an e rated. I assume you have a single rear wheel truck, fill out your signature so we can see what you have. I have a set of d rated mud tires for hunting season and a set of e rated all-terrains for the rest of the year. My d rated tires have a max psi of 65 lbs and my e rated tires have a max psi of 80 lbs. The pressure in the tires makes a huge difference when loaded heavy. the less pressure the more sway and heat build up.

Kyle

 

These truck call for load range E tires, thats all i would buy.

 

For what I do with my truck...I wish I had gone with a "E" rated instead of my "D" rated BFG all terrains. my "d" have lots of side to side sway
most guys here will flame me for this but the best riding setup IMHO is a 20" wheel with a 35" "E" rated tire=nice stable, stiff ride
if you tow heavy I say E rated for sure
my.02

 

Thank you for your replies. I had no idea about the pressure thing but it is very good to know. So any ideas for 37's on stock or 18 inch rims? I want allterrains E rated. I want to hold off on the mud terrains till summer. Thanks for any help!

 

It has more to do with the ply rating of the sidewall than air pressure. A load range D is 8 ply rated and the E is 10 ply rated.
I'm running 35" Toyo M/Ts and they are load range E and will carry their max load of 3415# at 65 psi.
You'll find the O.E.M. sizes in the E rating need 80 psi to carry their full load and the bigger aftermarket tires take 65 psi.
It's simple phyisics really, a smaller and skinnier tire needs more pressure to carry the same load as a bigger and wider tire.

 

Woodchuck said it well.

If it is simply a matter of carrying some weight and the D tires you run are rated for that weight you should be fine. And if the new tires are oversized they will carry the weight in a "D" that a smaller tire would carry in an "E".

I've put over 100,000 miles on Ds on my truck in both the 315s and 285s. I tow in the mountains and I carry weight when not towing.

If two equal sized tires were there and I had to pick, I'd always pick the E rating but sometimes the tire I want only comes in a D and I'll take it if it's rated for more weight than the stock E size. This has served me well with the BFG 315s and 285s because they were both way more capable off road and in the snow on the highway than the stockers were, while still carrying the load.

My next set will probably be the new Toyo 285/75/17 AT in E rating. They are available in E so I'll get them.

Also, these tires are all 2 or 3 ply sidewall tires that the dealers try to tell you are 8 or 10 ply. It's marketing BS. The E tires (10 ply RATING) are stronger but not because they have more plies, just stronger plies.


John