Tire Pressure Question
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New User
Joined: Jun 2015
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Tire Pressure Question
I have a new 2015 Super Crew XLT 2.7EB. So far 1,000 miles.
The truck rides good but I feel every bump on the road through the steering wheel. It feels like the tires have too much air in them. On the door it says 40 psi cold. Thats what I have them set at.
Now my other two trucks I had, Super Crew XLT '09 and '14 both said 35 psi on the door.
'09 and '14 came with Michelin tires.
'15 came with hankook tires.
Why would a truck thats suppose to be lighter run 40 psi?
Would it hurt to run them at 35 psi?
The truck rides good but I feel every bump on the road through the steering wheel. It feels like the tires have too much air in them. On the door it says 40 psi cold. Thats what I have them set at.
Now my other two trucks I had, Super Crew XLT '09 and '14 both said 35 psi on the door.
'09 and '14 came with Michelin tires.
'15 came with hankook tires.
Why would a truck thats suppose to be lighter run 40 psi?
Would it hurt to run them at 35 psi?
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
I believe that the door listed pressure is what you have to have to handle the rated axle gross weight listed on the sticker. Lower pressure would give a smother ride and lower both your mpg and load carrying numbers.
Cross-Country
Joined: Jan 2015
Posts: 89
Likes: 5
From: Central New Jersey
You could dropthem to 35 but you may not feel much of a difference. Keep in mind this is a new truck, the suspension will settle. Also keep in mind you probably have a tire monitor system on this truck and any drop in pressure may cause the light to come on. Todays vehicles are engineered for specific fuel economy and performance needs, I would stay with 40.
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
I know after a few miles, adding the cap and all the stuff I normally carry with me mine has smoothed out a lot.
Super Moderator
Joined: Jan 2008
Posts: 40,024
Likes: 1,519
From: Maine, Virginia
Let's not confuse "cold pressure" with maximum pressure.
My truck came with the el cheapo Hankooks and my door plate states 38 PSI cold for 235-75-17 tires. I once aired them down to below 35 for a smoother ride and the truck felt squishy and the tires looked like they were slack, which of course they were.
I now have the BFG Rugged Terrains, 265-70-17. The sidewall states a max pressure of 44 PSI. The tire tech aired them to 38-40. I read a link and can't find it now that stated that tires should be run at 20% below Max Pressure.
I sure would like to read some of your thoughts on this.
My truck came with the el cheapo Hankooks and my door plate states 38 PSI cold for 235-75-17 tires. I once aired them down to below 35 for a smoother ride and the truck felt squishy and the tires looked like they were slack, which of course they were.
I now have the BFG Rugged Terrains, 265-70-17. The sidewall states a max pressure of 44 PSI. The tire tech aired them to 38-40. I read a link and can't find it now that stated that tires should be run at 20% below Max Pressure.
I sure would like to read some of your thoughts on this.
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Lead Driver
Joined: May 2015
Posts: 5,881
Likes: 359
From: Mts. S. of San Francisco
I have a new 2015 Super Crew XLT 2.7EB. So far 1,000 miles.
The truck rides good but I feel every bump on the road through the steering wheel. It feels like the tires have too much air in them. On the door it says 40 psi cold. Thats what I have them set at.
Now my other two trucks I had, Super Crew XLT '09 and '14 both said 35 psi on the door.
'09 and '14 came with Michelin tires.
'15 came with hankook tires.
Why would a truck thats suppose to be lighter run 40 psi?
Would it hurt to run them at 35 psi?
The truck rides good but I feel every bump on the road through the steering wheel. It feels like the tires have too much air in them. On the door it says 40 psi cold. Thats what I have them set at.
Now my other two trucks I had, Super Crew XLT '09 and '14 both said 35 psi on the door.
'09 and '14 came with Michelin tires.
'15 came with hankook tires.
Why would a truck thats suppose to be lighter run 40 psi?
Would it hurt to run them at 35 psi?
Now you have me wondering....
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Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
I have a new 2015 XLT supercrew with the 6-1/2' box and it came with 275/65R18 Goodyears. The door sticker says 35 PSI, but I noticed the day we picked it up & the dealer was going over the controls, that the console display was 42 PSI all around.
Now you have me wondering....
Now you have me wondering....
Former Vendor
Joined: Feb 2014
Posts: 73
Likes: 0
From: West Chester
I have a new 2015 XLT supercrew with the 6-1/2' box and it came with 275/65R18 Goodyears. The door sticker says 35 PSI, but I noticed the day we picked it up & the dealer was going over the controls, that the console display was 42 PSI all around.
Now you have me wondering....
Now you have me wondering....
On a warm day, I notice a 4-6 psi difference within a 12 mile (some highway) trip in the company truck.
Lead Driver
Joined: May 2015
Posts: 5,881
Likes: 359
From: Mts. S. of San Francisco
). I checked the TP on the console at one point and it was up to 47 PSI...
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
Door sticker calls for 35 with my tires but I always like running them a little higher. Took 9.5 gallons to go up north but only 8.5 coming home. This is normal that I burn more gas going up then coming home. Not sure if it's because going north is going up and coming home is going down, according to the globe anyways.. I'm sure it's not because I'm in more of a hurry to get up to the cottage than I am to get back home!
Senior User
Joined: Jun 2005
Posts: 176
Likes: 0
From: Central IL
I see a lot of different tire sizes listed here with each different PSI. I am no tire expert, but wouldn't the size, ply, load rating all affect the PSI? I always check the PSI called for on the tire and try to be within a couple pounds of it. With everyone changing the cheap tires that come with the truck, it seems more logical to me to match what the tire manufacturer wants in them instead of what the door states. Again, NOT a tire expert, just my 0.02.
I agree that the rough ride could be a new truck(suspension) needing to wear.
I agree that the rough ride could be a new truck(suspension) needing to wear.
Tuned
Joined: Feb 2013
Posts: 474
Likes: 4
From: SE Michigan
I see a lot of different tire sizes listed here with each different PSI. I am no tire expert, but wouldn't the size, ply, load rating all affect the PSI? I always check the PSI called for on the tire and try to be within a couple pounds of it. With everyone changing the cheap tires that come with the truck, it seems more logical to me to match what the tire manufacturer wants in them instead of what the door states. Again, NOT a tire expert, just my 0.02.
I agree that the rough ride could be a new truck(suspension) needing to wear.
I agree that the rough ride could be a new truck(suspension) needing to wear.
No way is a tire manufacturer going to know all this and put it on the tire. They tell you the max weight the tire can handle at the max pressure.
I prefer running 38 have been for years in my trucks no mater what the sticker says. Got 135,000 miles off the stock Goodyears on my 2002 F150. Only replaced them because of their age they still had a lot more miles on them.
True my truck doesn't ride as smooth as my 1995 J6 Jaguar but dam it's a truck!! And a nice one at that! And it has most of the neat things that the Jaguar has even if it took 20 years.