tyre pressure
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tyre pressure
I have a problem about tyre pressure. I don't remember how much pressure do Mercedes benz give to the tyre when they delivery the car . My tyre is original Michelin 245/45 R18 . I see some of the forum they say just put it 200kpa for normal . If it passengers is less than 5 person for long time, just put 200kpa is enough for all days. But when I ask tyre workshop , they told me to put 250kpa for all days either more or less passengers . So how many kpa I should put for normal drive or sometimes will more passengers?
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Joined: Apr 2006
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
Opinion #2...
Read the maximum pressure on the tire sidewall. Then inflate tires to 10% under this value on the sidewall. 15% less if you want a softer ride. This has worked for me for more than 20 years, first for tire wear efficiency, but especially now with all the threads here about bent rims on low profile tires.
This is a constant debate on these forums: Whether to follow the car door plackard or the tire sidewall. I'm in the camp that believes the tire manufacturers know what is best for their tires than the car manufacturers, who can't predict what tire -- among thousands -- you will use, so provide a useful range for all tires but not tailored for any specific tire.
Read the maximum pressure on the tire sidewall. Then inflate tires to 10% under this value on the sidewall. 15% less if you want a softer ride. This has worked for me for more than 20 years, first for tire wear efficiency, but especially now with all the threads here about bent rims on low profile tires.
This is a constant debate on these forums: Whether to follow the car door plackard or the tire sidewall. I'm in the camp that believes the tire manufacturers know what is best for their tires than the car manufacturers, who can't predict what tire -- among thousands -- you will use, so provide a useful range for all tires but not tailored for any specific tire.
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Seat Alhambra
I am able to calculate the pressure for you .
the tyre-specifications I can google, but look for me if they are XL/reinforced/extraload.
then I need real weights on seperate tyres best.
Now you are not planning to weigh, so we have to estimate it , using empty weight, max permissable axle-weight( MPAW), MPVW( V for Vehicle) , and the way you load it normally.
The 2.00bar is probably safe to ride max permissable carspeed fully loaded theoretically.
The 2.5 bar gives more fuelsaving, but ride can be less comfortable, and gripp less, but max gripp is not always needen.
Give the data, and I will calculate, and show what I do, so you understand what the effects are of the choice you make.
the tyre-specifications I can google, but look for me if they are XL/reinforced/extraload.
then I need real weights on seperate tyres best.
Now you are not planning to weigh, so we have to estimate it , using empty weight, max permissable axle-weight( MPAW), MPVW( V for Vehicle) , and the way you load it normally.
The 2.00bar is probably safe to ride max permissable carspeed fully loaded theoretically.
The 2.5 bar gives more fuelsaving, but ride can be less comfortable, and gripp less, but max gripp is not always needen.
Give the data, and I will calculate, and show what I do, so you understand what the effects are of the choice you make.
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From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
If you have run flats inflating to 10% or 15% of maximum pressure will give you a rock hard ride.
I use the values on the gas filler flap + 10%
I use the values on the gas filler flap + 10%
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MBWorld Fanatic!
Joined: Feb 2014
Posts: 6,190
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From: MA
2008 E350 4Matic, 2011 E350 4matic
Opinion #2...
Read the maximum pressure on the tire sidewall. Then inflate tires to 10% under this value on the sidewall. 15% less if you want a softer ride. This has worked for me for more than 20 years, first for tire wear efficiency, but especially now with all the threads here about bent rims on low profile tires.
This is a constant debate on these forums: Whether to follow the car door plackard or the tire sidewall. I'm in the camp that believes the tire manufacturers know what is best for their tires than the car manufacturers, who can't predict what tire -- among thousands -- you will use, so provide a useful range for all tires but not tailored for any specific tire.
Read the maximum pressure on the tire sidewall. Then inflate tires to 10% under this value on the sidewall. 15% less if you want a softer ride. This has worked for me for more than 20 years, first for tire wear efficiency, but especially now with all the threads here about bent rims on low profile tires.
This is a constant debate on these forums: Whether to follow the car door plackard or the tire sidewall. I'm in the camp that believes the tire manufacturers know what is best for their tires than the car manufacturers, who can't predict what tire -- among thousands -- you will use, so provide a useful range for all tires but not tailored for any specific tire.
Many articles about this out there, all you have to do is search for it. Pretty much none make the recommendation you're making.
https://blog.tirerack.com/blog/coope...-their-vehicle
https://blog.tirerack.com/blog/bens-...-in-your-tires
https://info.kaltire.com/the-right-t...isnt-the-best/
https://www.firestonecompleteautocar...tire-pressure/
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MBWorld Fanatic!
Joined: Apr 2006
Posts: 4,694
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
It's generally accepted to use the one by the car manufacturers. They know what kind of shocks and springs are on the car, know the handling characteristics and they designed the car with a certain tire size and tire size in mind. The tire manufacturer has none of that. They just know what the safe maximum pressure is for the tire they designed. Always go with the tire placard on the car. That's what it's there for. Otherwise there'd be no need for it and you just go by whatever is on the tire. The tire pressure number is there for the maximum safe pressure of the tire. Not the recommended one. There's a difference.
Many articles about this out there, all you have to do is search for it. Pretty much none make the recommendation you're making.
https://blog.tirerack.com/blog/coope...-their-vehicle
https://blog.tirerack.com/blog/bens-...-in-your-tires
https://info.kaltire.com/the-right-t...isnt-the-best/
https://www.firestonecompleteautocar...tire-pressure/
Many articles about this out there, all you have to do is search for it. Pretty much none make the recommendation you're making.
https://blog.tirerack.com/blog/coope...-their-vehicle
https://blog.tirerack.com/blog/bens-...-in-your-tires
https://info.kaltire.com/the-right-t...isnt-the-best/
https://www.firestonecompleteautocar...tire-pressure/
Tire manufacturers do much more than mold tires with MAX psi printed on them.. In order to establish Govt regulated wet/dry Traction and Treadwear values they must live up to (warrantee), tire companies must establish correct -- if not optimum -- pressures before testing each particular tire.
IMO, the placard values are more than 80% LAWYER speak, only. The rest is designed obsolescence marketing hype to sell you replacement tires when your underinflated OEM tires wear out prematurely. There are dozens of threads here about OEM tires dying with less than 25,000 miles. And check out Continental Tire's website, where they offer up to 80,000 mile tread warrantees, LOL You won't get 1/2 that on any Continental tire using the B-Pillar placard inflation values.
Look at the Tire pressure placard on a Mercedes, then examine the placard on a Ford Focus, a Toyota Avalon, and a Dodge RAM SUV. The tire pressure values will be within 1-2 PSI of being identical.
Last edited by DFWdude; Mar 6, 2020 at 01:40 PM.
