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Discussion Starter #1
So I got tired really early with the road noise that (IMO) killed the usefulness of having the Tech option Infinity audio, and made the decision to change tires. The interior noise of this car is my only gripe, otherwise its a perfect car for me and there's nothing else on the market that "fits". Most of you won't think of this as a priority, but I wanted a somewhat luxury compact with power. The lack of sound deadening, and the choice of OEM tire, makes it a fail in that regard.

I found a tire shop that would give me a decent trade in on the Hankook Ventus S1 Noble 2, as they were so new. I was originally trying to make a major change and switch from the Ultra High Performance category to the Grand Touring category. I also considered buying new rims in 17" size and change aspect ratio from 40 to 45, but that was big bucks and I like the wheels.

Bought Dunlop Signature HP which you can see from the Tire Rack owner ratings are a step up and a reasonable price too.

https://www.tirerack.com/tires/surveyresults/surveydisplay.jsp?type=UHPAS

The road noise is definitely lower and I was able to enjoy the music (and the drive) more on the way home. time will tell.

Next on my list is ordering some Dynamat and doing the trunk area, which sounds like a drum when knocking on it with its total lack of sound deadening. I'll keep everyone updated. ;)
 

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Discussion Starter #2
By the way, as noted in that link, the Dunlop is also in the Ultra High Performance category. I couldn't find anything I wanted in our size in the "lesser performance" categories at a good price. However I wasn't necessarily looking for a softer ride, just lessen the noise.
 

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I've thought about changing to some Pirelli P7's as they have great reviews. Also, I've heard RAAMmat is a good alternative (and cheaper) than Dynamat and will also be lining the trunk with it. As someone that does NVH for a living, I think my job has ruined me since I notice every little sound the car makes.
 

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Discussion Starter #5
Question for OP and others...would a dealership change tires at request before you take delivery?
Good question. I've tried it a few times with previous new cars, and never had a dealership do it. No harm in asking though. Sometimes they have a strong link to a tire shop if they aren't into tire sales themselves.

First look for a shop that sells new and used tires and see if you can make a deal in advance.

I looked at it as getting an option for the car that wasn't offered from the factory, as I obviously wasn't the target market for this car.
 

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I've thought about changing to some Pirelli P7's as they have great reviews. Also, I've heard RAAMmat is a good alternative (and cheaper) than Dynamat and will also be lining the trunk with it. As someone that does NVH for a living, I think my job has ruined me since I notice every little sound the car makes.
The P7s were definitely on my list as they are in the Grand Touring category. Unfortunately up where I am, I need reasonable performance in light snow, even though this is a secondary car for winter (the other one has snows). Here is Tire Rack's consumer survey for Grand touring tires;

https://www.tirerack.com/tires/surveyresults/surveydisplay.jsp?type=GTAS&width=225/&ratio=40&diameter=18&tireSearch=true&filter=y&autoMake=Hyundai&autoYear=2017&autoModel=Elantra+Sedan&autoModClar=Sport#runflat

The Kumho TA71 was my first choice because of price mainly, but I had to wait a few weeks for them to be shipped.

Thanks for the tip about RAAMmat too! From searching around, its a product we don't have up here and to get it we are into shipping and duty $, on top of a poor exchange rate. I'll keep looking because Dynamat is big $$$.
 

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Is the sound from the trunk area because of the independent rear suspension? I don't see complaints about other Hyundai models or even different Elantra trims. This seems like a very poor combo from Hyundai. The noise complaints on this trim are really starting to add up. Hoping they resolve this for the 2018 model. This has potential to be a very nice "luxury performance compact" vehicle. Obviously not there yet. And this fix from the OP isn't cheap.
 

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Is the sound from the trunk area because of the independent rear suspension? I don't see complaints about other Hyundai models or even different Elantra trims. This seems like a very poor combo from Hyundai. The noise complaints on this trim are really starting to add up. Hoping they resolve this for the 2018 model. This has potential to be a very nice "luxury performance compact" vehicle. Obviously not there yet. And this fix from the OP isn't cheap.
I doubt it has anything to do with the IRS. It mostly comes down to tire size, tire type and insulation, plus the firmer suspension. In the case of the other Elantras which probably have the same insulation (?), the tires are much different and would make all the difference in comparison.

Here is an explanation of all the tire categories. Note how far apart ultra high performance is from standard all season tires that are on the boring Elantras;

https://www.thoughtco.com/tire-performance-categories-explained-3234419

When they go to larger wheels and smaller sidewalls, with larger tread width, the ride gets much noisier. On top of that, the type of tire (ultra high performance) has a more firm sidewall. Everything put together is there for a purpose - much better handling, sharper turn-in and steering. The target market for this car matches up perfectly with what they produced. In other words, they had no intention of making a "luxury" performance compact. I'm trying to make it more that way but most won't notice my concerns.

It will be up to Genesis to get into the luxury performance compact market, however if the Kia Stinger platform is used I fear the G70 will be way too big for me.

Actually the fix, ie; trading tires, cost me the difference of Cdn. $ 388-, which is about $ 285- US. Not bad for an option on my car, which is how I look at it. :)
 

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The target market for this car matches up perfectly with what they produced. In other words, they had no intention of making a "luxury" performance compact. I'm trying to make it more that way but most won't notice my concerns.

Actually the fix, ie; trading tires, cost me the difference of Cdn. $ 388-, which is about $ 285- US. Not bad for an option on my car, which is how I look at it. :)
Thanks for the info! Yes Hyundai has created a little niche here with this vehicle. Actually $285 isn't that bad for the tires. I thought it would be more. Still though, the noise IS an issue (near major) with this vehicle and something Hyundai needs to figure out. How much is the sound deadening?
 

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Is the sound from the trunk area because of the independent rear suspension? I don't see complaints about other Hyundai models or even different Elantra trims. This seems like a very poor combo from Hyundai. The noise complaints on this trim are really starting to add up. Hoping they resolve this for the 2018 model. This has potential to be a very nice "luxury performance compact" vehicle. Obviously not there yet. And this fix from the OP isn't cheap.
If you open the trunk and lift the floor panel you'll see nothing but a spare tire and bare metal. That bare metal is what is causing all the noise because there is no melt sheet on it to dampen the sound. To me this is one of the obvious places where they took stuff out of the car to save on costs. It's an easy fix though.
 

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If you open the trunk and lift the floor panel you'll see nothing but a spare tire and bare metal. That bare metal is what is causing all the noise because there is no melt sheet on it to dampen the sound. To me this is one of the obvious places where they took stuff out of the car to save on costs. It's an easy fix though.
I just bought some sound deadener mats, installing them tonight or tomorrow. I will let y'all know if it makes difference in the trunk area.
 

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I just bought some sound deadener mats, installing them tonight or tomorrow. I will let y'all know if it makes difference in the trunk area.
I was also going to pull the rear seat bottom out to look under there but haven't gotten around to it yet. You can tell driving down the road that most of the noise comes from the rear of the car.
 

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I was also going to pull the rear seat bottom out to look under there but haven't gotten around to it yet. You can tell driving down the road that most of the noise comes from the rear of the car.
I installed sound deadening mats in the trunk last night. The result is ineffective against cabin noise.

You might be right on the seat area.
I think the wheel well area had to be insulated.

But good news, I installed some mats on the door, did help with audio quality slightly.

Conclusion, change tires for less cabin noise to enjoy your audio!
 

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I installed sound deadening mats in the trunk last night. The result is ineffective against cabin noise.
What brand/type did you install? Got pics?
 

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I installed sound deadening mats in the trunk last night. The result is ineffective against cabin noise.

You might be right on the seat area.
I think the wheel well area had to be insulated.

But good news, I installed some mats on the door, did help with audio quality slightly.

Conclusion, change tires for less cabin noise to enjoy your audio!
The top customer review did mention that it's more for vibration reduction than sound deadening, so I hope you're happy with that aspect of it?
 

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The top customer review did mention that it's more for vibration reduction than sound deadening, so I hope you're happy with that aspect of it?
Correct. I wasn't expecting a whole of change in noise, but I wanted to do my own test to see. I don't think the ES had whole lot of vibration to begin with. (At least my car is only 2 months old). But I do think applying it to the doors made a difference to the audio quality.
 

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Correct. I wasn't expecting a whole of change in noise, but I wanted to do my own test to see. I don't think the ES had whole lot of vibration to begin with. (At least my car is only 2 months old). But I do think applying it to the doors made a difference to the audio quality.
Happy to hear :)
 

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Discussion Starter #19
Correct. I wasn't expecting a whole of change in noise, but I wanted to do my own test to see. I don't think the ES had whole lot of vibration to begin with. (At least my car is only 2 months old). But I do think applying it to the doors made a difference to the audio quality.
This makes sense to me as its audio sounds, I wonder though if material meant for sound deadening would make a difference in the trunk? There's a huge difference in cost, and also I read some reviews comparing dynamat with cheaper alternatives and there was a big difference there too.
 

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