michelin PSS wobble?
Thread Starter
Racer
Joined: Aug 2006
Posts: 288
Likes: 11
From: South of Chicago Illinois
michelin PSS wobble?
2008 base automatic with ECS kit at 540 rwhp.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
Drifting
Joined: Oct 2006
Posts: 1,724
Likes: 23
From: Minnesota
2008 base automatic with ECS kit at 540 rwhp.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
Check the ZR1 in the vid below at about the 35 second mark. Is this what yours is doing? My GS was doing that same thing right after the 3/4 shift. 345/30 19's Pilot Sport SS's. Just did it when accelerating hard. It was worse at lower rear air pressures. At 34psi and up, no wobble. At cruise or light acceleration, it didn't do it even at lower air pressures. Just did it when running hard and using all 660+rwhp.
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
Le Mans Master
Joined: Mar 2001
Posts: 8,472
Likes: 3,970
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
Have the same issue with my ZR1 size PS2s. Have tried alignment and higher air pressure, neither have made any difference. Mine isn't severe, so it has been more of an irritation than a major concern, but a friend with a blown GS running new PSS 345/30R19s had severe wobble that I observed while behind him. This isn't the first thread I've seen on the issue, and the only tire brand that people seem to have the issue with is Michelin, which is why I most likely will not go with them again. They are a great tire, but when I asked two Michelin tech/reps at the Corvette corral tent at the Tudor race in Austin, they said they had not heard anything about it and were not aware of anyone having behavior like I was describing.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
They've heard about it. Hell, I told a rep about it. As much as I like everything else about the tire, I won't be buying them again either. Mine was on a 6K mile 2013 Grand Sport with a fresh alignment. It was bad enough at lower tire pressures that there was NO thought of trying to drive through it.
Racer
Joined: Jul 2011
Posts: 294
Likes: 4
From: Frisco Tx
2008 base automatic with ECS kit at 540 rwhp.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
With my new PSS tires I have a a severe side to side "wobble" over 100mph. Tires are at 30psi. 305/30/19's. Could it be breaking traction? Is there any improvement options for the base suspension? Anyone else have this issue? I don't remember the original runflats doing this.
Thanks.
Check the ZR1 in the vid below at about the 35 second mark. Is this what yours is doing? My GS was doing that same thing right after the 3/4 shift. 345/30 19's Pilot Sport SS's. Just did it when accelerating hard. It was worse at lower rear air pressures. At 34psi and up, no wobble. At cruise or light acceleration, it didn't do it even at lower air pressures. Just did it when running hard and using all 660+rwhp.
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
https://www.youtube.com/watch?v=G6su...EA8204FD8&t=8s
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
https://www.youtube.com/watch?v=G6su...EA8204FD8&t=8s
Have the same issue with my ZR1 size PS2s. Have tried alignment and higher air pressure, neither have made any difference. Mine isn't severe, so it has been more of an irritation than a major concern, but a friend with a blown GS running new PSS 345/30R19s had severe wobble that I observed while behind him. This isn't the first thread I've seen on the issue, and the only tire brand that people seem to have the issue with is Michelin, which is why I most likely will not go with them again. They are a great tire, but when I asked two Michelin tech/reps at the Corvette corral tent at the Tudor race in Austin, they said they had not heard anything about it and were not aware of anyone having behavior like I was describing.
I thought these tires were the best thing since sliced bread and now I don't trust them!
NOTE: I did find that one rim had pitched the wheel weights (2.25oz) though that shouldnt cause a sway. I aired them up and the car seemed OK but now my low end grip is shot.
They've heard about it. Hell, I told a rep about it. As much as I like everything else about the tire, I won't be buying them again either. Mine was on a 6K mile 2013 Grand Sport with a fresh alignment. It was bad enough at lower tire pressures that there was NO thought of trying to drive through it.
Last edited by racerxrick; Sep 29, 2015 at 11:43 AM.
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Thread Starter
Racer
Joined: Aug 2006
Posts: 288
Likes: 11
From: South of Chicago Illinois
Check the ZR1 in the vid below at about the 35 second mark. Is this what yours is doing? My GS was doing that same thing right after the 3/4 shift. 345/30 19's Pilot Sport SS's. Just did it when accelerating hard. It was worse at lower rear air pressures. At 34psi and up, no wobble. At cruise or light acceleration, it didn't do it even at lower air pressures. Just did it when running hard and using all 660+rwhp.
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
https://www.youtube.com/watch?v=G6su...EA8204FD8&t=8s
I don't really see a down side to running a little higher air pressures. Still a good ride. The alternative for me was getting new rear tires. I'm going to scrub some more rubber off of these before getting anything different.
https://www.youtube.com/watch?v=G6su...EA8204FD8&t=8s
Racer
Joined: Nov 2014
Posts: 346
Likes: 16
From: sioux falls south dakota
Had the same problem with my pss. I brought it to a tire shop and the tire was bad. I guess there was a bad batch or 2 that got released to the plant. Michelin will discount you a new tire depending on tread depth. I bought a different set of pss and my car stays stuck. i'm at 747rwhp and that wobble was crazy scary. Always kicked in on my 2 to 3rd shift. Take it to a tire shop and have them check the balance. Lots of info on this matter that Michelin keeps on saying they have never heard anything about which is bogus.
Burning Brakes
Joined: Aug 2014
Posts: 1,019
Likes: 30
From: Mentor Ohio
Had the same problem with my pss. I brought it to a tire shop and the tire was bad. I guess there was a bad batch or 2 that got released to the plant. Michelin will discount you a new tire depending on tread depth. I bought a different set of pss and my car stays stuck. i'm at 747rwhp and that wobble was crazy scary. Always kicked in on my 2 to 3rd shift. Take it to a tire shop and have them check the balance. Lots of info on this matter that Michelin keeps on saying they have never heard anything about which is bogus.
Do you know the date codes that they were concerned with?
Thread Starter
Racer
Joined: Aug 2006
Posts: 288
Likes: 11
From: South of Chicago Illinois
Update, Called Michelin and was told to go to local discount tire for them to look at my tires. Michelin has warranted my rear tires at 75% and fronts at 55%. Hate to give up on these but apparently they must know there is a problem. Going to try Nitto INVO's next. Any experience with INVO's or any reason NOT to go with them?
Thanks
Thanks
Le Mans Master
Joined: Mar 2001
Posts: 8,472
Likes: 3,970
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
As a second choice to PSS, I'd try the Bridgestone RE-11. They're stickier than the PSS and have pretty good life. The only downside is that they tend to flat spot very quickly. So you can get a shimmy as they warm up. I'd grab a set of those before the Nittos, but that's just me.
Le Mans Master
Joined: Dec 2005
Posts: 6,999
Likes: 1,685
From: Southeast TX
Sorry, I don't. But I don't think of Nitto very highly when it comes to performance tires. Drag radials maybe, but not Invos.
As a second choice to PSS, I'd try the Bridgestone RE-11. They're stickier than the PSS and have pretty good life. The only downside is that they tend to flat spot very quickly. So you can get a shimmy as they warm up. I'd grab a set of those before the Nittos, but that's just me.
As a second choice to PSS, I'd try the Bridgestone RE-11. They're stickier than the PSS and have pretty good life. The only downside is that they tend to flat spot very quickly. So you can get a shimmy as they warm up. I'd grab a set of those before the Nittos, but that's just me.
Le Mans Master
Joined: Mar 2001
Posts: 8,472
Likes: 3,970
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
I've only heard of this issue affecting Michelins, specifically PS2, Pilot Super Sport, and Sport Cup 2s.
The new MT Street S/S look like they should be good, but they keep backing up the release date. They've been due out for over 6 months and still nothing.
The new MT Street S/S look like they should be good, but they keep backing up the release date. They've been due out for over 6 months and still nothing.