Recall/Free Tire Replacement???

[Seattle Genesis]

Did you check the tire pressures, especially compared to what the old tires were inflated to?

Yep. First thing I checked once I pulled into the garage and let the car cool down after a few hours. Checked and they were all 31psi cold. Once I started driving it and they all heated up to about 35-36 psi hot. So these seem to expand (lack of a better word) in psi more than the Hankooks. Not sure if its the weather here. We are having a heat wave here in Seattle. Summer has started and it was up to 89-91 yesterday. Happy about that

 

[allagaroo]

Had 1st maintenance today but dealer says Michelins are backordered. I do get a slight noise and mild vibration on certain surfaces but car handles well and I'm reluctant to go from a ultrahigh performance to a grand touring tire unless it's quieter than the Hankooks. Not getting many performance reports from those of you who had tires replaced.

 

[Alwaysforward]

Had 1st maintenance today but dealer says Michelins are backordered. I do get a slight noise and mild vibration on certain surfaces but car handles well and I'm reluctant to go from a ultrahigh performance to a grand touring tire unless it's quieter than the Hankooks. Not getting many performance reports from those of you who had tires replaced.

I would recommend holding off until end of 2017 (According to online posts, the offer is good until March 2018 on the new rubber) before pulling the trigger on the free tires. I have minor flat spotting that goes away after a few minutes. I am going to wear out my tires before switching over.

 

[allagaroo]

I have a 36 month lease and I only put on app. 8000 miles annually. If the Michelins are going to be more comfortable I want to enjoy them not put them on for the next owner.

 

[jarred52]

Yep. First thing I checked once I pulled into the garage and let the car cool down after a few hours. Checked and they were all 31psi cold. Once I started driving it and they all heated up to about 35-36 psi hot. So these seem to expand (lack of a better word) in psi more than the Hankooks. Not sure if its the weather here. We are having a heat wave here in Seattle. Summer has started and it was up to 89-91 yesterday. Happy about that

The tire pressure after filing, is a function of temperature and has no relation to the type of tire. The 31 psi cold pressure seems low; check the recommended pressure on the sticker inside the driver door.

 

[Mark_888]

The tire pressure after filing, is a function of temperature and has no relation to the type of tire. The 31 psi cold pressure seems low; check the recommended pressure on the sticker inside the driver door.

From what I have read, tires heat up because of the following:

• Flexing - The more the sidewalls and tread flex, the more heat is generated since flexing occurs at a very rapid rate at highway speeds (enough to generate heat). Some tires naturally have stiffer sidewall flex than other tires (and therefore generate less heat). Under-inflated tires will flex more than correctly inflated tires, thus generating more heat, especially at highway speeds. Typically, the lower the speed rating of a tire, the more it flexes by design (H flexes more than V), but the H tires are usually a little more comfortable than a V (for same exact tire model/design where all other things are equal).
• Tire compounds and materials - Different rubber compounds and internal materials (tire belts, etc) may heat up at different rates when flexed during highway driving. Early steel belted radial tires were notorious for failing due to excess heat build up when the steel belts flexed during high speed driving.
• Tread Design - some very aggressive tread designs may cause more/faster flexing of the tread, resulting in more heat.

 

[DRS]

From what I have read, tires heat up because of the following:

• Flexing - The more the sidewalls and tread flex, the more heat is generated since flexing occurs at a very rapid rate at highway speeds (enough to generate heat). Some tires naturally have stiffer sidewall flex than other tires (and therefore generate less heat). Under-inflated tires will flex more than correctly inflated tires, thus generating more heat, especially at highway speeds. Typically, the lower the speed rating of a tire, the more it flexes by design (H flexes more than V), but the H tires are usually a little more comfortable than a V (for same exact tire model/design where all other things are equal).
• Tire compounds and materials - Different rubber compounds and internal materials (tire belts, etc) may heat up at different rates when flexed during highway driving. Early steel belted radial tires were notorious for failing due to excess heat build up when the steel belts flexed during high speed driving.
• Tread Design - some very aggressive tread designs may cause more/faster flexing of the tread, resulting in more heat.

All great points above and another comment like it.

I have a suggestion. nitrogen.. I used to laugh at those who paid to get this. Until we got free nitro and full on tires with one of my daughters Vic LX Sport We have for her... Anyway, she is in cold zone. And the cast wheels can let out air on the bead area. With the nitrogen, pressures never change, cold, heat, rolling in heat, no leaks. With the new replacement tires on 2015, I will be looking for a dealer who has nitrogen.. That way, pressures will stay the same.. Kind of a pain to "fill". But, so far on the Vic, never had to fill. Just a suggestion.. Not for everybody.. Plus some likely laughing like they breathed it in themselves at the suggestion. I get that.

 

[Mark_888]

All great points above and another comment like it.

I have a suggestion. nitrogen.. I used to laugh at those who paid to get this. Until we got free nitro and full on tires with one of my daughters Vic LX Sport We have for her... Anyway, she is in cold zone. And the cast wheels can let out air on the bead area. With the nitrogen, pressures never change, cold, heat, rolling in heat, no leaks. With the new replacement tires on 2015, I will be looking for a dealer who has nitrogen.. That way, pressures will stay the same.. Kind of a pain to "fill". But, so far on the Vic, never had to fill. Just a suggestion.. Not for everybody.. Plus some likely laughing like they breathed it in themselves at the suggestion. I get that.

I agree that nitrogen does hold the pressure longer than air (79% nitrogen 20% oxygen, 1% other).

Costco is good place to get new tires since they use nitrogen, and will refill any time for free, and do 7500 mile rotations for free. Costco has very high customer service IMO. Even though Costco is a warehouse store sort of like Sam's, the customer experience is totally different. Costco employees are among the highest paid with best benefits in retail, and it shows with the level and quality of service you get.

In fact, if you have a Costco membership, they may refill your tires with nitrogen for free even if you did not buy them at Costco (but I am not sure about that).

 

[Midnightsun]

I have a suggestion. nitrogen.. I used to laugh at those who paid to get this. Until we got free nitro and full on tires with one of my daughters Vic LX Sport We have for her... Anyway, she is in cold zone. And the cast wheels can let out air on the bead area. With the nitrogen, pressures never change, cold, heat, rolling in heat, no leaks. With the new replacement tires on 2015, I will be looking for a dealer who has nitrogen.. That way, pressures will stay the same.. Kind of a pain to "fill". But, so far on the Vic, never had to fill. Just a suggestion.. Not for everybody.. Plus some likely laughing like they breathed it in themselves at the suggestion. I get that.

Only benefit to nitrogen is it is thicker than air so to say and it permeates through the tire at a slower rate. Definitely changes pressure with temperature and does need to be refilled but not as often. Even my best friend who owns a tire shop tells me it is a waste but heck if people want to pay for something then he will offer it and does. Read this http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=191

 

[DRS]

Only benefit to nitrogen is it is thicker than air so to say and it permeates through the tire at a slower rate. Definitely changes pressure with temperature and does need to be refilled but not as often. Even my best friend who owns a tire shop tells me it is a waste but heck if people want to pay for something then he will offer it and does. Read this http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=191

I would have not believed it myself, hearing what you have. However, in the Dakota winter of -15, or summers of 90 tire pressure stays the same (within one/two pounds). Highway cruising also does not seem to affect tire pressure. And it was free. Some thing is different than just air. Decent article on your link..

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[Mark_888]

Even my best friend who owns a tire shop tells me it is a waste but heck if people want to pay for something then he will offer it and does.

Costco uses nitrogen at no extra charge to customers.

 

[Midnightsun]

I would have not believed it myself, hearing what you have. However, in the Dakota winter of -15, or summers of 90 tire pressure stays the same (within one/two pounds). Highway cruising also does not seem to affect tire pressure. And it was free. Some thing is different than just air. Decent article on your link..

Not to be argumentative but your tire pressure gauge must be broken.

What are the effects of temperature change on my nitrogen filled tires?

The pressure in nitrogen filled tires will change when the temperature changes, just as it does with air filled tires, because nitrogen and oxygen respond to changes in ambient temperature in a similar manner. For example, when your vehicle is parked it will lose a similar amount of pressure for every 10 degree change in temperature, whether the tires are filled with nitrogen or air.

The calculations for this change are based on the Ideal Gas Law. A good rule of thumb is this: For every 10 F degree change in temperature, the pressure will change by 1.9%. If a tire is filled to 32 psi at a temperature of 75 F degrees and the temperature drops 10 degrees, the tire pressure will drop to 31.4 psi; a difference of .6 psi. If a 100 psi tire is filled at 75 F degrees and the temperature drops 10 degrees, the tire pressure will drop to 98.1 psi; a difference of .9 psi.

These fluctuations will occur as the temperature rises and falls no matter what the inflation gas. Fortunately, tire manufacturers are well aware of these conditions and design their tires and recommend their cold inflation pressure accordingly.

 

[kn5owa]

Only benefit to nitrogen is it is thicker than air so to say and it permeates through the tire at a slower rate. Definitely changes pressure with temperature and does need to be refilled but not as often. Even my best friend who owns a tire shop tells me it is a waste but heck if people want to pay for something then he will offer it and does. Read this http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=191

As was pointed out prev., air is already 79% nitro. On another Hyundai forum, this became a hot topic and a couple of chemical engineers calculated that if you let the air out of your tires, and then re-inflated five times over, you would get the nitro. percentage up to 95%.

If it's free and makes you happy, go for it.

Where it becomes a scam is when it is listed on new cars as an "add-on" option at an expense of perhaps $600. Little pricey - but I have seen this many times.

 

[Mark_888]

Where it becomes a scam is when it is listed on new cars as an "add-on" option at an expense of perhaps $600. Little pricey - but I have seen this many times.

Not many people buy cars at sticker price (MSRP plus dealer add-ons), so what they put on the sticker is irrelevant, except for people who have no idea on how to negotiate with a car salesperson.

 

[kn5owa]

Not many people buy cars at sticker price (MSRP plus dealer add-ons), so what they put on the sticker is irrelevant, except for people who have no idea on how to negotiate with a car salesperson.

It is relevant in evaluating the dealer - especially a rip-off of that magnitude.

A local Honda dealer routinely puts $1000 of "add-ons" on the sticker, and then very generously offers that much in discount.

I.e., the dealer expects MSRP price.

 

[Canuck-Ottawa]

Canadian dealers were notified this week that Michelin tires are to used in Canada too, so letters to clients will start going out soon.

They were also sent the TSBs for the cowl cover and lower dash cover replacements.

 

[Mark_888]

It is relevant in evaluating the dealer - especially a rip-off of that magnitude.

I just tell the salesperson that I don't want it and will not pay for it. If I only bought cars from dealers that did not at least try to rip off naïve customers, then I would never be able to buy a car.

The point is that the sticker price is completely irrelevant when shopping for a car. Always start negotiating from what you consider to be an a great price, usually below the best price you have heard that anyone else has ever received.

 

[Seattle Genesis]

OK. Getting back to the original subject about the tire recall. Ive been riding on these new ContiPRO TX...... tires for about a week and I must say they seem to fit the vehicle pretty good. They look good. they sound better than they did the first day. Checked all the PSI and it seems a bit low around 31 cold, but heat up to about 35-36 psi. All in all seems to be a good transaction. Thanks Hyundai.

 

[Mark_888]

OK. Getting back to the original subject about the tire recall. Ive been riding on these new ContiPRO TX...... tires for about a week and I must say they seem to fit the vehicle pretty good. They look good. they sound better than they did the first day. Checked all the PSI and it seems a bit low around 31 cold, but heat up to about 35-36 psi. All in all seems to be a good transaction. Thanks Hyundai.

You should inflate the tires to the recommended amount when tires are cold (which actually means 68-70 F). If that means your hot tire pressure is 37-38, so be it.

Recommend tire pressure for the Genesis is 33 PSI cold, unless you have a 2015 V8 that has different tires front and rear, and in that case please refer to page 8-4 of your 2015 Owner's Manual because some axles should be 33 PSI and some axles should be 35 PSI cold.

The compact spare should be 60 PSI, and needs to be checked regularly since it leaks air over time at that pressure.

 

[PaFromFL]

...The pressure in nitrogen filled tires will change when the temperature changes...
...The calculations for this change are based on the Ideal Gas Law...

One advantage of nitrogen is that it contains no water vapor. Typical air contains water vapor (also a near ideal gas) and some of it condenses inside the tire. Higher temperatures evaporate some of the water, causing a significant change in the partial pressure of the water vapor (by increasing the number of gas molecules in the tire). That being said, I use air in my tires because the small pressure changes don't matter for my type of driving.