Factory Michelin Tires.....???

[Nightkidzero13]

Hey everyone,

I recently bought a 2020 Stinger GT1 AWD with 25,000 miles on it. I have no way of confirming if the tires on the car are the same type that came on the car or not. Michelin A/S Touring or something like that is what's on it now, my question is are these tires known for road noise or anything like that? I have been chasing a small vibration in the gas pedal. I work for a Land Rover dealer and had our A tech drive it and he didn't seem too concerned about anything it was doing. I already changed the front brakes and rotors when I bought the car because they were destroyed but its still present. Tires have all been balanced and I have been running factory inflation. I was thinking about trying to drop it down some to see if it helps the issue.

I am at my wits end trying to locate the source of this issue. I have limited experience with Michelin tires. I can not get the car to replicate this issue on command and it kind of comes and goes. Could it be a tire issue, road noise, loose control arms? Anything would be great

thx

 

[D.J.]

ave no way of confirming if the tires on the car are the same type that came on the car or not. Michelin A/S Touring or something like that is what's on it now, my question is are these tires known for road noise or anything like that?

You are asking if these specific tires are known for road noise, but you are saying the tires are A/S touring OR SOMETHING LIKE THAT?

What tires are in the vehicle right now? What size?

Michelin A/S touring tires are not known for road noise.

 

[Nightkidzero13]

factory sizes all around they are Michelin primacy A/S touring. Date codes are all within 2023 or newer. any info on what this weird noise is? in the research i have done most people point to brakes and tire balance and those have all been done, car was aligned and when i did a shake down on the front end nothing was loose, no play in the arms or bearings.

 

[D.J.]

factory sizes all around they are Michelin primacy A/S touring. Date codes are all within 2023 or newer. any info on what this weird noise is? in the research i have done most people point to brakes and tire balance and those have all been done, car was aligned and when i did a shake down on the front end nothing was loose, no play in the arms or bearings.

I vote, it is the tires.

But without hearing the sound that you are describing, nobody is going to be able to say with absolute certainty.

• Does it occur at only one speed?
• Does it occur above a certain speed?
• Does it occur above a certain speed, but below a certain speed?
• Does it only happen on one specific road?

 

[JSolo]

I run the tires in my sig. ~13K miles on them now. On certain road surfaces (well worn asphalt) I'll get a noise or vibration. On certain (not all) concrete roads, will also get a different vibration.

On brand new asphalt it's dead quiet. The above is all at highway speeds (50 mph+)

 

[Snicklefritz]

A tire can have a flaw from the factory. Road force balancing will reveal any flaws. One of my recent tire purchases had to be sent back and a replacement sent out because of a flaw, discovered only under road force balancing. This was a Nitto tire, but Michelin are not flawlessly perfect either.

 

[Volfy]

I already changed the front brakes and rotors when I bought the car because they were destroyed but its still present.

Not sure what exactly you are trying to say there, but it doesn't sound good. Did you not give the car a good once-over BEFORE buying it? I wonder what else might be questionable on it.

 

[D.J.]

Not sure what exactly you are trying to say there, but it doesn't sound good. Did you not give the car a good once-over BEFORE buying it? I wonder what else might be questionable on it.

Especially at such low mileage!

 

[Volfy]

Especially at such low mileage!

Right. Again, I'm not sure what "destroyed but it's still present" means, but it sure sounds like something pretty violent happened in that Stinger's prior life. I'm just thinking it's kinda difficult to hurt just the brakes really hard, without stressing out other parts of the car. Tires, bearings, suspension, drivetrain, etc.

 

[Ah GetFd]

"I have limited experience with Michelin tires."

A little research on google which you have already found will confirm Michelin are the number one tyre brand in the world.

They are not cheap. They are fitted to most high performance cars

Kia supplied the Michelin "Pilot Sport 4" on the MY 23 Kia Stinger GT from the factory and had done that for some time after replacing the former Continental tyre which was supplied on Stingers from the factory.

There is nothing wrong with Michelin tyres though the "AS Touring" is not the recommended model tyre for that car.

In my opinion that is a softer tyre for "premium" models ie to give a more comfortable ride whereas high performance ca tyres have more rigid walls (note the Pilot 4 "S" has stiffer side walls......than the Pilot 4 and is the replacement for the Pilot 4 here)....to provide for higher performance handling (cornering for example)

""

The Michelin Primacy Tour A/S has the quietest tread design among leading competitors.""​

I provide the USA link for you all the way from Australia.................

Buy Michelin Primacy Tour A/S Tires | Michelin

Michelin Primary Tour A/S tires are the perfect match for drivers who want to get the relaxing driving experience they expect from their premium vehicle.

www.michelinman.com

https://www.michelin.com.au/auto/tyres/michelin-pilot-sport-4

 

[Snicklefritz]

Primacy Tour A/S may be the tire chosen at the factory, but the buyer rating works out to be 3.5, not impressive. With a car as heavy as the Stinger, and as fast, I don't think that a "W", much less a "V" rated tire is a good idea. But anyone putting less than a "Y" rated tire on is likely not intending to ever push anywhere near the speed limiter of 140, much less likely to push 167. I like the Nitto Motivo's "Y" rating, the highest for any A/S tire. What other brand does that?

 

[Nightkidzero13]

• Does it occur at only one speed?
• Does it occur above a certain speed?
• Does it occur above a certain speed, but below a certain speed?
• Does it only happen on one specific road?

No it is present at various speeds seems
I have had it over triple digits and it seemed fine ( felt when slowing back down though )
It does seems to be more road specific than speed dependent.

Not sure what exactly you are trying to say there, but it doesn't sound good. Did you not give the car a good once-over BEFORE buying it? I wonder what else might be questionable on it.

Very low pad level and visible heat spotting on the rotors. From doing research on the cars history, it was owned and operated in Ohio for about 3 years. It was purchased shortly before Covid and that could help explain the low mileage. The car has been looked over by myself multiple times and by 2 different techs at my work. No evidence of any other stressed out components.

Primacy Tour A/S may be the tire chosen at the factory, but the buyer rating works out to be 3.5, not impressive. With a car as heavy as the Stinger, and as fast, I don't think that a "W", much less a "V" rated tire is a good idea. But anyone putting less than a "Y" rated tire on is likely not intending to ever push anywhere near the speed limiter of 140, much less likely to push 167. I like the Nitto Motivo's "Y" rating, the highest for any A/S tire. What other brand does that?

I generally agree with this statement, personally I feel like Michelin tires are over rated. Despite what the post above yours says. If i was a tire manufacturer I would also claim my tires where one of the quietest in production because again you have a product to sell. Land rover uses Pirelli P-Zero with the advanced noise mitigation system in them. Also known as some damn foam on the inside of the tire. They flat spot when you leave them outside on a hot day because of the weight on them. I doubt they are going to put that in the sales info

 

[stoopid]

Road force balance the tires. But if the tread is getting low (it might be if they're the tire original to the car), might want to spend that time/money instead upgrading them. There's numerous threads on this forum about tire suggestions if you decide that route. But we'll probably end up repeating all that info here because that's the internets.

 

[StingerVetteMan]

Not sure what came on 2020 models but newer ones have the Michelin PS4 A/S tires like on my 2023. Awesome tires! Have the same ones on my 2019 Corvette Grand Sport. My GT Line original came with Bridgestone Potenza tires which I am not a fan of. Had those also on my Corvette and were very stiff and horrible ride.

 

[Nightkidzero13]

yeah i doubt i would be having issues if they were the ps4 tires these are like the lowest economy michelin

 

[Volfy]

Very low pad level and visible heat spotting on the rotors. From doing research on the cars history, it was owned and operated in Ohio for about 3 years. It was purchased shortly before Covid and that could help explain the low mileage. The car has been looked over by myself multiple times and by 2 different techs at my work. No evidence of any other stressed out components.

Okay, there are reasons that could happen with 25k miles on the odo. Could have be taken to the track. Or, it could've been driven in the mountains with the driver riding the brakes on downhill passes (instead of downshifting to engine brake). Either way, the stock pads don't take heat very well and will wear very quickly, taking the rotors with it. Depending on how hot they got (I've seen cars with the rotors glowing red coming down mountains), the wheel bearing could be cooked as well. If that is the case, you should hear the bad bearings pretty much all the time, which doesn't sound like it in your case. Or, if the bearings aren't quite trashed, they could make noise only with increased load (braking/ cornering).

That said, it is kinda hard to difficult to diagnose the noise without hearing it first hand. Bearing, CV joints, tires, suspension, drivetrain all make different noises, at different times.

 

[Nightkidzero13]

Okay, there are reasons that could happen with 25k miles on the odo. Could have be taken to the track. Or, it could've been driven in the mountains with the driver riding the brakes on downhill passes (instead of downshifting to engine brake). Either way, the stock pads don't take heat very well and will wear very quickly, taking the rotors with it. Depending on how hot they got (I've seen cars with the rotors glowing red coming down mountains), the wheel bearing could be cooked as well. If that is the case, you should hear the bad bearings pretty much all the time, which doesn't sound like it in your case. Or, if the bearings aren't quite trashed, they could make noise only with increased load (braking/ cornering).

That said, it is kinda hard to difficult to diagnose the noise without hearing it first hand. Bearing, CV joints, tires, suspension, drivetrain all make different noises, at different times.

Yea that is the hard part for me too. I did spin the wheels off the ground with my hand on the springs and did not feel anything. closest way to describe this noise is its very similar to the thud like noise you would get when experiencing brake fade. Like a rotational whompping noise. I checked all driveshafts and axles, nothing looked odd and i checked it after putting about 3k miles on it again. no boot tears or bushing tears to speak off, no grease falling out of the boots. It is the singular most annoying issue I have with this car. Love everything about it ( minus the hard shift in sport mode ) but for the life of me this noise is elusive. Coming from a veloster N i am wondering if the exhaust is just too quiet for what I am used to and I am able to hear the tires more than in that car. I am ordering ARK mids and cat back to help with that issue

 

[Volfy]

Yea that is the hard part for me too. I did spin the wheels off the ground with my hand on the springs and did not feel anything.

There is pretty much zero load when the wheel is in the air, so whatever is causing the noise might not be obvious in that scenario.

closest way to describe this noise is its very similar to the thud like noise you would get when experiencing brake fade. Like a rotational whompping noise. I checked all driveshafts and axles, nothing looked odd and i checked it after putting about 3k miles on it again. no boot tears or bushing tears to speak off, no grease falling out of the boots. It is the singular most annoying issue I have with this car. Love everything about it ( minus the hard shift in sport mode ) but for the life of me this noise is elusive. Coming from a veloster N i am wondering if the exhaust is just too quiet for what I am used to and I am able to hear the tires more than in that car. I am ordering ARK mids and cat back to help with that issue

Stuff like this is another reason it's nice to have more than one set of wheels/tires. I swap sets fairly frequently, and I can easily tell how every set of tires sound like. it is also why having a square setup makes it easy to do diagnostics, as I can swap front to rear and/or side to side. Sometimes, the noise/problem follows a particular tire/wheel. I recently had to do exactly that, when I found some loose new wheel weights in my driveway. I could tell they'd fallen off the set I just got new tires mounted, but I couldn't figure out exactly which one(s) they came from. Swapped a couple of them around, and, at elevated hwy speeds, the one out-of-balance shook the steering wheel when it got rotated to the front.

I would suggest you (safely) do a few things to make the noise easier to identify. Get up to higher speeds. Find some nice long sweeping Interstate on/off ramps and do some sustained cornering - in either direction. Do some braking tests: (1) hard emergency-type stomp (2) longish sustained pressure on the pedal. Find different road surfaces. I know of several different sections on my commute route that tend to make some of my tires really roar loudly. Those type of tarmac that amplify tire noise are great for tire noise diagnostics.

 

[Nightkidzero13]

There is pretty much zero load when the wheel is in the air, so whatever is causing the noise might not be obvious in that scenario.

Stuff like this is another reason it's nice to have more than one set of wheels/tires. I swap sets fairly frequently, and I can easily tell how every set of tires sound like. it is also why having a square setup makes it easy to do diagnostics, as I can swap front to rear and/or side to side. Sometimes, the noise/problem follows a particular tire/wheel. I recently had to do exactly that, when I found some loose new wheel weights in my driveway. I could tell they'd fallen off the set I just got new tires mounted, but I couldn't figure out exactly which one(s) they came from. Swapped a couple of them around, and, at elevated hwy speeds, the one out-of-balance shook the steering wheel when it got rotated to the front.

I would suggest you (safely) do a few things to make the noise easier to identify. Get up to higher speeds. Find some nice long sweeping Interstate on/off ramps and do some sustained cornering - in either direction. Do some braking tests: (1) hard emergency-type stomp (2) longish sustained pressure on the pedal. Find different road surfaces. I know of several different sections on my commute route that tend to make some of my tires really roar loudly. Those type of tarmac that amplify tire noise are great for tire noise diagnostics.

I am going to have the wheels road forced balanced just to take away the possibility it has anything to do with that. but otherwise ill see what i can do

 

[stoopid]

Yea that is the hard part for me too. I did spin the wheels off the ground with my hand on the springs and did not feel anything. closest way to describe this noise is its very similar to the thud like noise you would get when experiencing brake fade. Like a rotational whompping noise. I checked all driveshafts and axles, nothing looked odd and i checked it after putting about 3k miles on it again. no boot tears or bushing tears to speak off, no grease falling out of the boots. It is the singular most annoying issue I have with this car. Love everything about it ( minus the hard shift in sport mode ) but for the life of me this noise is elusive. Coming from a veloster N i am wondering if the exhaust is just too quiet for what I am used to and I am able to hear the tires more than in that car. I am ordering ARK mids and cat back to help with that issue

What you're describing is exactly the sound I've had a few times with cars at speed with a balancing issue. In my most recent case, it was one of the rear tires even though I also felt a slight shake in the steering wheel. Road force and almost back to smooth as silk (my tires are 20k miles, so they'll never be new again).