What is your PSI ???
07-01-2008, 09:49 PM
#1
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1999 E320 & 2008 S550 Designo
What is your PSI ???
What is everyone setting their PSI in the tires to?
In an effort to squeeze more MPG out of my W210 these days...I have increase it to 40 ish PSI instead of mid 30's. (the max on the tires says 51 PSI) but I don't feel comfortable going pass 45 PSI.
I am running General tires (which I like for the price and they look decent)
235/45/17
It would be great to hear to the averages.... please specify the tires size so I can compare apples to apples.
In an effort to squeeze more MPG out of my W210 these days...I have increase it to 40 ish PSI instead of mid 30's. (the max on the tires says 51 PSI) but I don't feel comfortable going pass 45 PSI.
I am running General tires (which I like for the price and they look decent)
235/45/17
It would be great to hear to the averages.... please specify the tires size so I can compare apples to apples.
07-03-2008, 11:35 PM
#2
Super Member
I run 215/55/16 stock rubber at 30psi front and 32psi rear. I get 31mpg in commute traffic.
With your wide rubber and increased pressure expect to wear the centers out in a hurry.
With your wide rubber and increased pressure expect to wear the centers out in a hurry.
07-04-2008, 12:23 PM
#4
Super Member
Do the math on your increased psi vs mpg gains and then factor in the decreased lifespan of rubber and see how it plays out.
I expect it is not cost effective and may not be too fun in the rain either.
I expect it is not cost effective and may not be too fun in the rain either.
07-05-2008, 10:28 AM
#7
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32front
38 rear and not much difference in ride quality and about 1-2 mpg more.It won't hurt tire life to bump them up 6-8 lbs over stock
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07-05-2008, 11:36 AM
#8
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98 Brilliant Silver E320 Wagon
I use 29/32 to compensate for low profile 17" tires and ride quality. I still get 19/28 mpg. I would raise pressures if I was hauling a load.
Personally, I think you can do more with adjusting your 'driving style' than manipulating tire pressures. Good luck.
Personally, I think you can do more with adjusting your 'driving style' than manipulating tire pressures. Good luck.
Last edited by RichardM98; 07-05-2008 at 11:47 AM.
07-05-2008, 06:24 PM
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2001 W210 E430 Elegance
I don't give a crap about fuel economy, raising tyre pressure is all about improving cornering grip and stability as far as I'm concerned.
Not sure where the "not much fun in the rain" comment comes from either - have a read of this article http://www.tirerack.com/tires/tirete...e.jsp?techid=3 to see the extra contact patch you get in the wet with properly inflated tyres.
Not sure where the "not much fun in the rain" comment comes from either - have a read of this article http://www.tirerack.com/tires/tirete...e.jsp?techid=3 to see the extra contact patch you get in the wet with properly inflated tyres.
07-05-2008, 09:51 PM
#10
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I don't give a crap about fuel economy, raising tyre pressure is all about improving cornering grip and stability as far as I'm concerned.
Not sure where the "not much fun in the rain" comment comes from either - have a read of this article http://www.tirerack.com/tires/tirete...e.jsp?techid=3 to see the extra contact patch you get in the wet with properly inflated tyres.
Not sure where the "not much fun in the rain" comment comes from either - have a read of this article http://www.tirerack.com/tires/tirete...e.jsp?techid=3 to see the extra contact patch you get in the wet with properly inflated tyres.
The article speaks of "proper" inflation and shows the weakness of under inflation. Says nothing to back up over inflation which was the OP's topic. Over inflating you ride the center of the tire and the footprint becomes smaller and harder, reducing its ability to grip in slippery conditions.
07-06-2008, 01:25 AM
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2001 W210 E430 Elegance
The point of your post and article you reference escapes me.
The article speaks of "proper" inflation and shows the weakness of under inflation. Says nothing to back up over inflation which was the OP's topic. Over inflating you ride the center of the tire and the footprint becomes smaller and harder, reducing its ability to grip in slippery conditions.
The article speaks of "proper" inflation and shows the weakness of under inflation. Says nothing to back up over inflation which was the OP's topic. Over inflating you ride the center of the tire and the footprint becomes smaller and harder, reducing its ability to grip in slippery conditions.
Regarding your "smaller and harder" contact patch with more psi....well, that's up to you to decide.
07-06-2008, 10:15 PM
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2001 E430 Sport
I run 37-38psi in the front with a 245 40 18. It the rear I'm running 39-44psi with a 275 35 18 Michelin Pilot Sport A/S. They have a softer sidewall so the higher psi suits my driving style better. The ride to me is not harsh at all I regularly return 22.5MPG in the city on summer mix.
