Yes another tire rating thread
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Junior User
Joined: Mar 2019
Posts: 71
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Yes another tire rating thread
Ok fellas. I feel stupid asking this so flame away...
I want 40” toyo’s but they only come in D rating.
The 37’s come in an E rating.
Trying to figure out the difference in weight. If I tow a 14k trailer with a SRW F350 will the 40’s in a D rating be over capacity? I’ve looked around trying to see if there’s a specific lbs rating for the different letter ratings but I have not found anything that gives an actual number.
I definetly need some clarification and hoping y’all can shed some light. Thanks so much!
I want 40” toyo’s but they only come in D rating.
The 37’s come in an E rating.
Trying to figure out the difference in weight. If I tow a 14k trailer with a SRW F350 will the 40’s in a D rating be over capacity? I’ve looked around trying to see if there’s a specific lbs rating for the different letter ratings but I have not found anything that gives an actual number.
I definetly need some clarification and hoping y’all can shed some light. Thanks so much!
More Turbo
Joined: Jul 2013
Posts: 708
Likes: 161
From: Everett, Washington
https://www.discounttire.com/learn/l...nge-load-index Explains Load ratings/Range
D 8 ply tire
E 10 ply tire
Load index # is how many LBS the tire can support.
You would need a 121 or better load index for that 14K trailer which is a E rated tire most likely.
D 8 ply tire
E 10 ply tire
Load index # is how many LBS the tire can support.
You would need a 121 or better load index for that 14K trailer which is a E rated tire most likely.
Thread Starter
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Junior User
Joined: Mar 2019
Posts: 71
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https://www.discounttire.com/learn/l...nge-load-index Explains Load ratings/Range
D 8 ply tire
E 10 ply tire
Load index # is how many LBS the tire can support.
You would need a 121 or better load index for that 14K trailer which is a E rated tire most likely.
D 8 ply tire
E 10 ply tire
Load index # is how many LBS the tire can support.
You would need a 121 or better load index for that 14K trailer which is a E rated tire most likely.
Posting Guru
Joined: Sep 2009
Posts: 1,739
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From: Virginia beach, VA
6400 includes the weight of the rear of the truck also. So axle, suspension, bed, etc.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
What is the specific load rating of the tire. There is some cross over of total pounds per tire for those types of tires. Most E rated tires are 3800 to 4000 lbs. D rated are more like 3000 to 3200 lbs but it really depends on the make and model type and size of the specific tire.
An F350 diesel, with a GVW of 11,500, is going to be able to handle the trailer no problem, in all likelihood, you will be at the max of an e rated tire on the rear axle. Also, tire pressure ratings are important. Most D rated tires are max 65 psi. Good for your front axle which recommended pressure is 60 PSi on my F350 diesel. But the rear inflation is 80 PSI for max GVW.
i believe the rear tires will be the Achilles heal of this proposed setup. No �� here, but I would go down to a 37 true E rated tire, and a good one for the use of that dump trailer and other high GVW towing.
now add to it the lift required for a 40” tire. Sag and handling will be considerable in my humble opinion.
An F350 diesel, with a GVW of 11,500, is going to be able to handle the trailer no problem, in all likelihood, you will be at the max of an e rated tire on the rear axle. Also, tire pressure ratings are important. Most D rated tires are max 65 psi. Good for your front axle which recommended pressure is 60 PSi on my F350 diesel. But the rear inflation is 80 PSI for max GVW.
i believe the rear tires will be the Achilles heal of this proposed setup. No �� here, but I would go down to a 37 true E rated tire, and a good one for the use of that dump trailer and other high GVW towing.
now add to it the lift required for a 40” tire. Sag and handling will be considerable in my humble opinion.
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Postmaster
Joined: Jan 2005
Posts: 4,424
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From: BC Canada
My CC LWB F350 weights 8500 lbs to 9000 lbs depending on toolbox and auxiliary fuel, has an 11,500 GVW.
those 40s will not do it for you. A 35” or even a 37” with as close to 4000 lb per tire rating is what is required.
those 40s will not do it for you. A 35” or even a 37” with as close to 4000 lb per tire rating is what is required.
Posting Guru
Joined: Sep 2009
Posts: 1,739
Likes: 0
From: Virginia beach, VA
Very loose estimate based on having weighed several different pickups over the years...5000 lbs front 3000 lbs rear
Logistics Pro
Joined: Apr 2000
Posts: 4,334
Likes: 306
From: Mills River
Find your tire size, ply rating, load index, and load vs inflation specs here:
https://www.toyotires.com/media/2125...s_20170203.pdf
Note that the “ply rating” rarely — if ever — corresponds to actual construction anymore. For example, the “10 ply rated ‘E’” tires on our truck are actually of eight ply construction: six in the tread, and two in the sidewalls.
Don’t get me wrong, as I’m not complainin’. IIRC, the last 10 ply E tires on our 2000 F250 were seven ply construction.
Actual construction details are described on the tire sidewalls.
HTH,
Jim / crewzer
https://www.toyotires.com/media/2125...s_20170203.pdf
Note that the “ply rating” rarely — if ever — corresponds to actual construction anymore. For example, the “10 ply rated ‘E’” tires on our truck are actually of eight ply construction: six in the tread, and two in the sidewalls.
Don’t get me wrong, as I’m not complainin’. IIRC, the last 10 ply E tires on our 2000 F250 were seven ply construction.
Actual construction details are described on the tire sidewalls.
HTH,
Jim / crewzer