C rated tires for the V10 Super Duty?
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C rated tires for the V10 Super Duty?
Just for the sake of arguement, let's say you bought a V10 SD for daily, mostly highway driving. Let's also say you will never ever tow more than 10,000lbs. Finally, lets say you have a truck cap on the back and never plan to have any more than 1000lbs in the bed.
Could you safely ride on c rated 265/70/r18 tires with this 7200lb truck?
If so, could you also safely tow 10,000lbs once or twice a year on these tires?
Interesting tires include the Michelin CrossTerrain SUV in 265/70/r18. This tire has a load index of 2640 per tire and weighs in at 38lbs. OD is 32.6 and Section width is 10.8.
The other is a more aggresive Off roader, the Bridgestone Dueler A/T Revo in 265/70/r18. Load index is also 2640 lbs. Weight is 43lbs, OD is 32.6, Section width is 10.7
The overall goal of this tire switch would be lower tire noise and improved ride quality over the standard 55lb, E rated brick.
The 1/2 tonners mostly come with non E rated tires, by the way. They all have GVWR over 8000lbs and tow ratings near 10,000 lbs.
Could you safely ride on c rated 265/70/r18 tires with this 7200lb truck?
If so, could you also safely tow 10,000lbs once or twice a year on these tires?
Interesting tires include the Michelin CrossTerrain SUV in 265/70/r18. This tire has a load index of 2640 per tire and weighs in at 38lbs. OD is 32.6 and Section width is 10.8.
The other is a more aggresive Off roader, the Bridgestone Dueler A/T Revo in 265/70/r18. Load index is also 2640 lbs. Weight is 43lbs, OD is 32.6, Section width is 10.7
The overall goal of this tire switch would be lower tire noise and improved ride quality over the standard 55lb, E rated brick.
The 1/2 tonners mostly come with non E rated tires, by the way. They all have GVWR over 8000lbs and tow ratings near 10,000 lbs.
Hotshot
Joined: Dec 2006
Posts: 14,069
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From: Melbourne, Ky
Originally Posted by beefeater
Just for the sake of arguement, let's say you bought a V10 SD for daily, mostly highway driving. Let's also say you will never ever tow more than 10,000lbs. Finally, lets say you have a truck cap on the back and never plan to have any more than 1000lbs in the bed.
Could you safely ride on c rated 265/70/r18 tires with this 7200lb truck?
If so, could you also safely tow 10,000lbs once or twice a year on these tires?
Interesting tires include the Michelin CrossTerrain SUV in 265/70/r18. This tire has a load index of 2640 per tire and weighs in at 38lbs. OD is 32.6 and Section width is 10.8.
The other is a more aggresive Off roader, the Bridgestone Dueler A/T Revo in 265/70/r18. Load index is also 2640 lbs. Weight is 43lbs, OD is 32.6, Section width is 10.7
The overall goal of this tire switch would be lower tire noise and improved ride quality over the standard 55lb, E rated brick.
The 1/2 tonners mostly come with non E rated tires, by the way. They all have GVWR over 8000lbs and tow ratings near 10,000 lbs.
Could you safely ride on c rated 265/70/r18 tires with this 7200lb truck?
If so, could you also safely tow 10,000lbs once or twice a year on these tires?
Interesting tires include the Michelin CrossTerrain SUV in 265/70/r18. This tire has a load index of 2640 per tire and weighs in at 38lbs. OD is 32.6 and Section width is 10.8.
The other is a more aggresive Off roader, the Bridgestone Dueler A/T Revo in 265/70/r18. Load index is also 2640 lbs. Weight is 43lbs, OD is 32.6, Section width is 10.7
The overall goal of this tire switch would be lower tire noise and improved ride quality over the standard 55lb, E rated brick.
The 1/2 tonners mostly come with non E rated tires, by the way. They all have GVWR over 8000lbs and tow ratings near 10,000 lbs.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
The sidewall on the "C" rated tires are not going to handle the weight of a SD well, even when empty.
We would load my dads old 93' F-150 SC with about 1200lbs in the bed with about 180lb tonque weight of the boat when we went on vacation. That truck had C rated (235/75/r15s I think) tires filled to max pressure. The tires on that truck were bulged pretty good with that load and it was a fairly light truck.
I would never go any lower than D rated tires on a SD.
We would load my dads old 93' F-150 SC with about 1200lbs in the bed with about 180lb tonque weight of the boat when we went on vacation. That truck had C rated (235/75/r15s I think) tires filled to max pressure. The tires on that truck were bulged pretty good with that load and it was a fairly light truck.
I would never go any lower than D rated tires on a SD.
Senior User
Joined: Oct 2007
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From: Alabama Gulf Coast
Originally Posted by beefeater
Any particular reasons other than a general opinion?
Please limit those reasons to the above, very narrow use guidelines proposed.
Please limit those reasons to the above, very narrow use guidelines proposed.
I feel that running a Super Duty with C rated tires does not give much room for error and then it becomes a safty factor. I can not think of a worse vehicle to have a blow out in, than a pick up truck.
Beside you will get better wear from D or E rated tires.
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Safety is certainly the number one priority. Number two would be ride quality, 3rd is noise, and last would be tire wear.
It seems to me though, that having 4- 2600lb rated tires would be adequate for the above conditions. Particularly when you see all the f150's running around with C rated tires, yet they are able to tow 10,000lbs and have a GVWR of over 8200lbs. 2600 x 4 is 10,400lbs. Well over the 7500lb unloaded weight the V10 SD would be running with 99% of the time yes? Remember we save 600lbs of the front by going with the V10 over the Diesel.
All other things being equal, a C rated tire with fewer plys, at 35 psi has got to ride better than the same sized E rated brick at 50-80 psi right? The ten pound weight loss per tire alone has got to count toward improved unsprung weight, thus allowing the suspension to repond better over the bumps.
It seems to me though, that having 4- 2600lb rated tires would be adequate for the above conditions. Particularly when you see all the f150's running around with C rated tires, yet they are able to tow 10,000lbs and have a GVWR of over 8200lbs. 2600 x 4 is 10,400lbs. Well over the 7500lb unloaded weight the V10 SD would be running with 99% of the time yes? Remember we save 600lbs of the front by going with the V10 over the Diesel.
All other things being equal, a C rated tire with fewer plys, at 35 psi has got to ride better than the same sized E rated brick at 50-80 psi right? The ten pound weight loss per tire alone has got to count toward improved unsprung weight, thus allowing the suspension to repond better over the bumps.
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Cargo Master
Joined: Nov 2005
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From: TEXAS
I seem to recall an earlier post where someone wanted to mount C rated tires on their Superduty, I believe it was at Sam's Club. Anyway Sam's refused and wouldn't do it. There stance from the company was "If the manufacture plates a tire rating on a vehicle based on the GVWR, and they would not mount and install a lesser rated tire due to liability factors"
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Hotshot
Joined: Dec 2006
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From: Melbourne, Ky
Let's see, how do I explain this. Here will be a simple test to try before you switch the tires. If the new tires you're looking at max out at 35psi, try putting 35psi in the tires that are on your truck right now. That will give you an idea what they will look like, since they are the same size. A D rated tire will handle 50 to 60psi I believe, and an E rated will handle 80psi. If it takes 50 or 60psi to carry your truck properly, that's what it takes. It won't matter what rating your tire has. If anything, an E rated tire will carry the load at 35psi easier than a C rated tire maxed out.
By the way, half ton pickups are lighter, and, while I haven't looked at one in a long time, I can't recall ever seeing one with a GVWR of 8000lbs or more.
By the way, half ton pickups are lighter, and, while I haven't looked at one in a long time, I can't recall ever seeing one with a GVWR of 8000lbs or more.
Hotshot
Joined: Dec 2006
Posts: 14,069
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From: Melbourne, Ky
By the way, half ton pickups are lighter, and, while I haven't looked at one in a long time, I can't recall ever seeing one with a GVWR of 8000lbs or more.
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Went to Fords website and yes, they do make some pretty heavy duty half-ton pickup trucks, but they are equipped with D rated tires, from what I found.
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Went to Fords website and yes, they do make some pretty heavy duty half-ton pickup trucks, but they are equipped with D rated tires, from what I found.
Hotshot
Joined: Mar 2007
Posts: 10,101
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From: Pa
Originally Posted by jonrjen
I seem to recall an earlier post where someone wanted to mount C rated tires on their Superduty, I believe it was at Sam's Club. Anyway Sam's refused and wouldn't do it. There stance from the company was "If the manufacture plates a tire rating on a vehicle based on the GVWR, and they would not mount and install a lesser rated tire due to liability factors"
They just don't want to deal with any possible liability issues. Also the people that work for them arn't the sharpest tools in the shed.
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John,
Good find. The heavy duty package for the f150 does come with d rated tires.
Regardless, the GVWR for the f250 is around 10,000lbs, so the 4 2600lb rated tires could still handle the max GVWR for the SD as well. For this scenerio though we are not getting close to the GVWR of the SD. We are getting up to the GVWR of the non heavy duty F150's which, again, ride on C's and tow 10,000lbs.
The max PSI for the two tires in question is 44psi, not 35. 35 is the usual norm for regular tires though.
Bad Habit, what exact D tires are you running? At what PSI?
Good find. The heavy duty package for the f150 does come with d rated tires.
Regardless, the GVWR for the f250 is around 10,000lbs, so the 4 2600lb rated tires could still handle the max GVWR for the SD as well. For this scenerio though we are not getting close to the GVWR of the SD. We are getting up to the GVWR of the non heavy duty F150's which, again, ride on C's and tow 10,000lbs.
The max PSI for the two tires in question is 44psi, not 35. 35 is the usual norm for regular tires though.
Bad Habit, what exact D tires are you running? At what PSI?
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I have Michelin LTX M/S 285/75/16. I had BF Goodrich something another (factory tires) 265/75/16 E rated and the truck drove great. My buddy has an Excursion with the same tires.
He bought his truck with those tires on it and we did everything known to man trying to figure out why his '02 Ex wandered. Then i bought the same tire, and mine started doing the same thing.
It really gets bad when I'm pulling a heavy trailer. My wife had these tires installed when I was on an extended road trip (I'm a trucker) and at the same time, my son's Ranger developed an issue. My son drove my truck for two weeks and when I got home the tires had 800 miles on them. When I saw what she put on the truck (after I specified to my wife I wanted E rated tires), I was POed beyond belief.
After paying $900 for this set, I have to wear them out.
I run them at 65 psi (maximum) all the way around.
He bought his truck with those tires on it and we did everything known to man trying to figure out why his '02 Ex wandered. Then i bought the same tire, and mine started doing the same thing.
It really gets bad when I'm pulling a heavy trailer. My wife had these tires installed when I was on an extended road trip (I'm a trucker) and at the same time, my son's Ranger developed an issue. My son drove my truck for two weeks and when I got home the tires had 800 miles on them. When I saw what she put on the truck (after I specified to my wife I wanted E rated tires), I was POed beyond belief.
After paying $900 for this set, I have to wear them out.
I run them at 65 psi (maximum) all the way around.