Bumpy Ride?
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Joined: Jun 2005
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From: Rancho Palos Verdes, CA
Bumpy Ride?
I recently started commuting with my car on the freeway and I've noticed that the SLK doesn't have the smoothest ride. Don't get me wrong, I love my car, and I would never trade it in for anything else, but sometimes it's just a little too bumpy. I don't notice any road noise when the top is down, probably because the noise doesn't resonate inside the cabin, but when the top is up, the noise and ride is a little too rough at times.
My tires were all around 25.5 psi, so I thought that was the reason, but even after inflating them to 36 psi in the front and 39 psi in the back, I still experience similar ride smoothness.
What're your thoughts?
My tires were all around 25.5 psi, so I thought that was the reason, but even after inflating them to 36 psi in the front and 39 psi in the back, I still experience similar ride smoothness.
What're your thoughts?
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Joined: Mar 2005
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From: sac, calif.
'06 slk55
Originally Posted by JBRhee
I recently started commuting with my car on the freeway and I've noticed that the SLK doesn't have the smoothest ride. Don't get me wrong, I love my car, and I would never trade it in for anything else, but sometimes it's just a little too bumpy. I don't notice any road noise when the top is down, probably because the noise doesn't resonate inside the cabin, but when the top is up, the noise and ride is a little too rough at times.
My tires were all around 25.5 psi, so I thought that was the reason, but even after inflating them to 36 psi in the front and 39 psi in the back, I still experience similar ride smoothness.
What're your thoughts?
My tires were all around 25.5 psi, so I thought that was the reason, but even after inflating them to 36 psi in the front and 39 psi in the back, I still experience similar ride smoothness.
What're your thoughts?
Also, I many times try various lanes to find the smoothest one. I never paid attention to this in my commuting-Camry but now I have learned the smoothest lane on my most traveled highways.
Senior Member
Joined: Sep 2005
Posts: 352
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From: SFV, CA
06 SLK55
Originally Posted by Mr Wolf
The ride is bumpy, but your in a 2 seat roadster not the E class get used to it. Wolf
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Joined: Jan 2005
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From: Texas
2005 SLK55 AMG
You have an AMG with AMG sport suspension. It will ride rougher than even the SLK350 with standard suspension.
If road noise is a problem, hit the + button on the steering wheel 4 or 5 times.
As and aside, why were you riding with you tires so low?
If road noise is a problem, hit the + button on the steering wheel 4 or 5 times.
Going to 36/39 will make it even stiffer.
SLK55er after some pretty extensive analysis, recommends 34/32.
I'm running 34.5/33
If road noise is a problem, hit the + button on the steering wheel 4 or 5 times.
As and aside, why were you riding with you tires so low?
If road noise is a problem, hit the + button on the steering wheel 4 or 5 times.
Going to 36/39 will make it even stiffer.
SLK55er after some pretty extensive analysis, recommends 34/32.
I'm running 34.5/33
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Joined: Jun 2005
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From: Rancho Palos Verdes, CA
Originally Posted by bloflin
Going to 36/39 will make it even stiffer.
SLK55er after some pretty extensive analysis, recommends 34/32.
I'm running 34.5/33
SLK55er after some pretty extensive analysis, recommends 34/32.
I'm running 34.5/33
What're the advantages of having a higher psi in the front? I was doing some research and all i could find was this:
"An underinflated tire will ride smoothly but feel sluggish, have mushy turn-in and go around corners with high slip angles or just not much grip at all. An overinflated tire will feel harsh on impact and over smaller bumps, and while responding crisply, will lack grip when pushed hard."
How's the ride when the tire pressure is 34/32?
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Joined: Jan 2005
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From: Texas
2005 SLK55 AMG
Originally Posted by JBRhee
Hey Blofin,
What're the advantages of having a higher psi in the front? I was doing some research and all i could find was this:
"An underinflated tire will ride smoothly but feel sluggish, have mushy turn-in and go around corners with high slip angles or just not much grip at all. An overinflated tire will feel harsh on impact and over smaller bumps, and while responding crisply, will lack grip when pushed hard."
How's the ride when the tire pressure is 34/32?
What're the advantages of having a higher psi in the front? I was doing some research and all i could find was this:
"An underinflated tire will ride smoothly but feel sluggish, have mushy turn-in and go around corners with high slip angles or just not much grip at all. An overinflated tire will feel harsh on impact and over smaller bumps, and while responding crisply, will lack grip when pushed hard."
How's the ride when the tire pressure is 34/32?
Rides fine.
Over on the other forum (benzworld) there is a fellow who has done some pretty extensive analysis and measurements.
Boils down to, the V8 weight on the front end is higher than load on the back. This is the reason for front higher than back.
Second, is his belief it must be the MB lawyers that make them quote a higher pressure, to ensure understeer. Perhaps also fall out from the Firestone debacle years ago (if you have to err to one side, err to high pressure)
Additionally, he's convinced running at 36/39 you will see all your wear in the center of the tire.
Then the final straw, was that MB doesn't seem to know what to set it at. The door sticker and the gas door sticker disagree. When asking MB service they were confused and no help.
So I went with the one person who seemed to know what he was talking about.
So to your quote above, 34/32 cold would not be considered an "underinflated" tire, but a correctly inflated tire.
His handle is slk55er.
Last edited by bloflin; Nov 3, 2005 at 01:15 PM.
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Joined: Oct 2005
Posts: 997
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From: Frisco Colorado, USA
2024 GLB35 AMG, 2020 S560 Coupe
'Tis I with the handle "slk55er".
I do believe that for normal driving, 34/32 psi F/R is a good setup. The higher front pressure will provide a crisper turn-in and the lower rear pressure will reduce wear on the center of the rear tires. And these pressures are low enough to maintain a reasonable comfort level.
On the track, I use a 40/36 F/R setup which really seems to be excellent.
You can read more about my tire pressure recommendations at
http://www.benzworld.org/forums/foru...220298&posts=2
and about some of my on-track sessions at
http://www.benzworld.org/forums/foru...osts=10&fid=27
http://www.benzworld.org/forums/foru...id=27#M1485561
Gordon Haines
I do believe that for normal driving, 34/32 psi F/R is a good setup. The higher front pressure will provide a crisper turn-in and the lower rear pressure will reduce wear on the center of the rear tires. And these pressures are low enough to maintain a reasonable comfort level.
On the track, I use a 40/36 F/R setup which really seems to be excellent.
You can read more about my tire pressure recommendations at
http://www.benzworld.org/forums/foru...220298&posts=2
and about some of my on-track sessions at
http://www.benzworld.org/forums/foru...osts=10&fid=27
http://www.benzworld.org/forums/foru...id=27#M1485561
Gordon Haines
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I replaced my tires/wheels with 17" shortly after I got my 55. I opted for Michelin Pilot-2 tires, in part due to their quietness and ride quality, and AMG split-5 spoke wheels (got both from Tire Rack). The AMG wheels that fit the SLK32 fit the 55 also.
The ride is a bit less harsh. Can't say how much. Also, the wheels are protected better from potholes and curbs.
I've been running 32 psi. F/R. My dealer seems to like 30 psi all around.
Great car!
The ride is a bit less harsh. Can't say how much. Also, the wheels are protected better from potholes and curbs.
I've been running 32 psi. F/R. My dealer seems to like 30 psi all around.
Great car!
