Max Wheel Air Pressure
12-11-2018, 08:13 PM
#1
Junior Member
Thread Starter
Max Wheel Air Pressure
Did a cursory search for this but didnt know in whcih forum to even look.
Own a 17 Screw XLT with the 3.5 EB, with max tow. I tow 5- 10k miles each yr with this and still on the stock Wranglers. I will be getting a larger heavier trailer and have been thinking about upgrading the tires to E load allowing inflation pressures up to 80#. Never really thought about the wheels themselves having a max pressure rating before, but have learned that not all wheels are created equal for inflation pressure.
Anyone know how to figure out what pressures my stock wheels can handle?
Own a 17 Screw XLT with the 3.5 EB, with max tow. I tow 5- 10k miles each yr with this and still on the stock Wranglers. I will be getting a larger heavier trailer and have been thinking about upgrading the tires to E load allowing inflation pressures up to 80#. Never really thought about the wheels themselves having a max pressure rating before, but have learned that not all wheels are created equal for inflation pressure.
Anyone know how to figure out what pressures my stock wheels can handle?
12-11-2018, 09:18 PM
#2
Senior Member
I don't know the answer, but 80 PSI is more than your wheels can handle. And you don't need 80 PSI for any load you will put in your truck. The "P" rated tires that came on it will carry more weight than your truck can handle. You could stay with P tires and air them up to about 40-45 psi when carrying or towing heavy and be just fine.
But if you want to go up to "E" rated tires there is little downside other than cost. The biggest advantage to E tires is a tougher sidewall for off road driving. You'll just have to experiment with different PSI to see what works best for you,but generally you will run about the same, maybe less PSI in them. They are a stiffer tire and don't need as much air.
I'm betting around 35-40 PSI will be about right unloaded and 40-45 PSI loaded heavy. Your trucks payload is probably around 2000 lbs, maybe less. The 80 PSI is for guys running 3/4 and 1 ton trucks with 3000-4000 lbs in the truck. It'd ride awful and bounce down the road at 80 PSI even if the wheels could handle it.
And having the max tow doesn't necessarily mean your truck will handle a heavier trailer. It is all about payload, not tow ratings. Better check that 1st.
But if you want to go up to "E" rated tires there is little downside other than cost. The biggest advantage to E tires is a tougher sidewall for off road driving. You'll just have to experiment with different PSI to see what works best for you,but generally you will run about the same, maybe less PSI in them. They are a stiffer tire and don't need as much air.
I'm betting around 35-40 PSI will be about right unloaded and 40-45 PSI loaded heavy. Your trucks payload is probably around 2000 lbs, maybe less. The 80 PSI is for guys running 3/4 and 1 ton trucks with 3000-4000 lbs in the truck. It'd ride awful and bounce down the road at 80 PSI even if the wheels could handle it.
And having the max tow doesn't necessarily mean your truck will handle a heavier trailer. It is all about payload, not tow ratings. Better check that 1st.
12-11-2018, 09:26 PM
#3
Trying to figure it out!
I can tell you running 80psi will all but jar your teeth loose. I would agree that running 45 would be a good compromise on a P rated when loaded (I run 40 in my e rated tires on my f150) and back down to 35-40 unloaded.
12-11-2018, 09:51 PM
#5
Junior Member
Thread Starter
I don't know the answer, but 80 PSI is more than your wheels can handle. And you don't need 80 PSI for any load you will put in your truck. The "P" rated tires that came on it will carry more weight than your truck can handle. You could stay with P tires and air them up to about 40-45 psi when carrying or towing heavy and be just fine.
But if you want to go up to "E" rated tires there is little downside other than cost. The biggest advantage to E tires is a tougher sidewall for off road driving. You'll just have to experiment with different PSI to see what works best for you,but generally you will run about the same, maybe less PSI in them. They are a stiffer tire and don't need as much air.
I'm betting around 35-40 PSI will be about right unloaded and 40-45 PSI loaded heavy. Your trucks payload is probably around 2000 lbs, maybe less. The 80 PSI is for guys running 3/4 and 1 ton trucks with 3000-4000 lbs in the truck. It'd ride awful and bounce down the road at 80 PSI even if the wheels could handle it.
And having the max tow doesn't necessarily mean your truck will handle a heavier trailer. It is all about payload, not tow ratings. Better check that 1st.
But if you want to go up to "E" rated tires there is little downside other than cost. The biggest advantage to E tires is a tougher sidewall for off road driving. You'll just have to experiment with different PSI to see what works best for you,but generally you will run about the same, maybe less PSI in them. They are a stiffer tire and don't need as much air.
I'm betting around 35-40 PSI will be about right unloaded and 40-45 PSI loaded heavy. Your trucks payload is probably around 2000 lbs, maybe less. The 80 PSI is for guys running 3/4 and 1 ton trucks with 3000-4000 lbs in the truck. It'd ride awful and bounce down the road at 80 PSI even if the wheels could handle it.
And having the max tow doesn't necessarily mean your truck will handle a heavier trailer. It is all about payload, not tow ratings. Better check that 1st.
Yeah, I'm real familiar with the critical parameters relative to matching a travel trailer to a tow vehicle. Main thought behind the E rated tires at higher pressure is for the added stability to the rear of the truck.. It's a common mod many do especially if they're trying to improve on a sway issue. Heavy tongue weights with flexible tire sidewalls do not make a good pairing. With my current setup 700# or so on the WD hitch and Timbrens, ,everything behaves well. Ill be going to abt 1000# and thought stiffer tires would be a good pre-emptive step to take.
We also boondock camp and those Wranglers don't look like they'll stand up to much abuse typical on Forest roads.
12-11-2018, 10:09 PM
#6
Capable DIYer
My new 2018 Supercab 4x4, max tow package wheels say:
"Max PSI 51."
So today when I aired them up at Fredmyers I aired them up to 45 psi. Helps with rolling resistance. For the little bit of yard waste and furniture I load in the bed it's a good compromise.
"Max PSI 51."
So today when I aired them up at Fredmyers I aired them up to 45 psi. Helps with rolling resistance. For the little bit of yard waste and furniture I load in the bed it's a good compromise.
12-11-2018, 10:38 PM
#7
Senior Member
Originally Posted by Army Strong
My new 2018 Supercab 4x4, max tow package wheels say:
"Max PSI 51."
So today when I aired them up at Fredmyers I aired them up to 45 psi. Helps with rolling resistance. For the little bit of yard waste and furniture I load in the bed it's a good compromise.
"Max PSI 51."
So today when I aired them up at Fredmyers I aired them up to 45 psi. Helps with rolling resistance. For the little bit of yard waste and furniture I load in the bed it's a good compromise.
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12-12-2018, 08:27 AM
#8
Keep an eye on tire wear whilst playing with your air pressures
12-12-2018, 01:38 PM
#9
Senior Member
Don't run less air in E-rated tires, you may cause sidewall cracking. Too much flexing. Michelin recommends 48psi minimum for my MS/2E. I run 55-60 towing.
12-12-2018, 10:42 PM
#10
Capable DIYer