Tire Pressure Experiments, Anyone? - Mercedes-Benz Forum
 
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Old 07-12-2019, 05:40 AM Thread Starter
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Tire Pressure Experiments, Anyone?

I've pretty much stuck with rated pressure of 28F 30R, maybe increasing by a pound or two. Stock wheels. Going to try to bump it up for economy and handling....will start with 32F 36R and see what I think. What have the rest of you discovered?

Rossafuss's comments in a recent thread on fuel economy got me thinking....

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Last edited by shertex; 07-12-2019 at 08:41 AM.
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Old 07-12-2019, 07:45 AM
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It depends on wheel size you have.

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Old 07-12-2019, 11:19 AM
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I run 34 all around just to maximize tire life. Seems to work for me!
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Old 07-13-2019, 03:14 AM
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34 front and 36 rear. The Nokian WR G3 tires seem to be best on the wagon at those pressures.
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Old 07-15-2019, 08:46 AM
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A couple psi difference is negligible. Better to spend the money on making sure fluids, filters and tires are replaced on schedule.
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Old 07-15-2019, 10:12 AM
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A couple psi difference is negligible. Better to spend the money on making sure fluids, filters and tires are replaced on schedule.
Hes not spending ony money, he's playing around with tire pressures. lol
2-3 PSI difference doesn't make much of a noticeable difference, but 5-8 PSI? 10 PSI?
A firmer tire absolutely changes handling and ride quality characteristics, and makes a noticeable difference in fuel economy. But over inflating the tire can cause uneven wear on the tires as well as harsher than desired ride quality.
When my tires (stock size on the CDI) fall below 30PSI, i notice much more loftiness in the handling of the car, as well as a harsher reaction from the suspension on rough road.

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Old 07-15-2019, 10:16 AM
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i've also found that if you live in an area with REALLY rough roads like i do, over inflating your tires just a liiiiiiiiiitle bit lowers the risk of damaging tires (specifically the sidewalls/belting) on potholes.

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Old 07-15-2019, 06:51 PM
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Originally Posted by Rossafuss View Post
Hes not spending ony money, he's playing around with tire pressures. lol
2-3 PSI difference doesn't make much of a noticeable difference, but 5-8 PSI? 10 PSI?
A firmer tire absolutely changes handling and ride quality characteristics, and makes a noticeable difference in fuel economy. But over inflating the tire can cause uneven wear on the tires as well as harsher than desired ride quality.
When my tires (stock size on the CDI) fall below 30PSI, i notice much more loftiness in the handling of the car, as well as a harsher reaction from the suspension on rough road.
Inflating by 10psi is so incredibly stupid. You want to pick up 0.3mpg at the most, to risk your life, and others in an event you need to swerve, or its wet and you lose traction.

Sounds stupid and irresponsible to me. Not to mention once you go beyond 5psi, you'll begin losing tread life because its no longer evenly distributed across the pattern.

Run them at stock specs, or a couple PSI higher and move on.

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Old 07-15-2019, 07:30 PM
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Running a Tire at 6PSI below the max rated pressure is not "incredibly stupid." I've been running THESE specific tires at 36-38psi for over 30k miles, the tread wear is perfect, so is my ride quality and handling. Maybe your one size fits all approach to tire pressures in the wide range of tire choices available maybe isn't accurate? MY original post OP is referring to specifically refers to the fact that every tire will have its own sweet spot for where it behaves at its best. Some tires may like lower tire pressures than others, and i specifically stated to be careful not to OVER INFLATE your tires to prevent harsh ride and uneven tire wear.

Here's the post, in-case you were at all curious as to what were talking about here.

https://www.benzworld.org/forums/w21...l#post17837370
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Old 07-15-2019, 11:54 PM
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Quote:
Originally Posted by ps2cho View Post
Quote:
Originally Posted by Rossafuss View Post
Hes not spending ony money, he's playing around with tire pressures. lol
2-3 PSI difference doesn't make much of a noticeable difference, but 5-8 PSI? 10 PSI?
A firmer tire absolutely changes handling and ride quality characteristics, and makes a noticeable difference in fuel economy. But over inflating the tire can cause uneven wear on the tires as well as harsher than desired ride quality.
When my tires (stock size on the CDI) fall below 30PSI, i notice much more loftiness in the handling of the car, as well as a harsher reaction from the suspension on rough road.
Inflating by 10psi is so incredibly stupid. You want to pick up 0.3mpg at the most, to risk your life, and others in an event you need to swerve, or its wet and you lose traction.

Sounds stupid and irresponsible to me. Not to mention once you go beyond 5psi, you'll begin losing tread life because its no longer evenly distributed across the pattern.

Run them at stock specs, or a couple PSI higher and move on.
You should tell those clowns in Stuttgart how incredibly stupid they are.

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Last edited by tjts1; 07-16-2019 at 08:32 AM.
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