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Newly purchased HRE's on my GT3. Is the back not wide enough?

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Old 08-29-2024, 11:55 PM
  #46  
M3Inline6
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Originally Posted by richiele23
Ah ok, attached is the ET I saw on the invoice. Front -Diameter: 20 Width: 9.5 ET

Rear-Diameter:

21 Width

12.5 ET: 48
You needed to go with more aggressive offsets to achieve the desired look. The wheel width is fine.
Old 08-30-2024, 02:45 AM
  #47  
ipse dixit
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I don't think those wheels look good on a GT3.
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Old 08-30-2024, 02:52 AM
  #48  
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Originally Posted by J Irwan
The offset is not the issue. (I've done the calculation above.Please see the offset table).

I always love how beefy the Michelin Cup 2 tires looks on Stock GT3 rim.

If OP were to have the stock Michelin Cup 2 - 315/30/21 in N-Spec installed on the HRE, we wont be having this conversation.

The stock GT3 offset is perfect as it is, and 3.3mm more outward on the HRE would have been nothing and would look largely the same appearance (in thickness or sidewall profile) as stock.


I am sure (this my assumption) that OP is not looking for stretched look, if you like the "stretch" looks then yes you go with even lower offset in order to fill the fender gap.
Sheesh, thank you everyone for your replies and input. Noted about not lowering the rear.

J Irwan - I did take a look at my tires and they are in fact AML. When I look at them from an angle, they do like they are "leaning" inward, as you gusys say stretched. I think if the wall were going straight up it would fill in the gap a little bit and be closer to the look I am trying to achieve. I like the tire/stance of the OEM wheels.

That said, should replacing the tires HRE sold me with the OEM tires be the best solution here?

I reached out to the HRE rep and he said:
Question though, is your GT3 lowered, or at the factory height? The fitment we went with on your vehicle specifically is what is called our F1 Fitment, this is what all customers go with unless requested otherwise. On a vehicle like a GT3, the fitment is already so tight from factory, there is not a ton of wiggle room. The rear tire (315/30-21) does have some stretch to it when mounted on a 21x12.50, but that’s due to the tire availability and what’s out there. The 325/30-21 would not meet any of Michelin’s standards, so we are stuck with the 315/30-21.

He is going to do more research on this situation and get back to me tomorrow.

Here are more photos for those that requested them:







Last edited by richiele23; 08-30-2024 at 03:29 AM.
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Old 08-30-2024, 03:12 AM
  #49  
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The super wide angle of the pics you are sharing aren't helping to determine how they truly look to the eye. They do look to me like they aren't as aggressive as I'd want mine to be- and I know HRE are super pricey- I have had some sets, so I can see how you'd feel disappointed. Please share a pic like cptcolo0 did for better understanding of the fitment, might help the forum give more informed input... although they have shared a lot of minutia already.
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Old 08-30-2024, 04:44 AM
  #50  
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Originally Posted by richiele23
Sheesh, thank you everyone for your replies and input. Noted about not lowering the rear.

J Irwan - I did take a look at my tires and they are in fact AML. When I look at them from an angle, they do like they are "leaning" inward, as you gusys say stretched. I think if the wall were going straight up it would fill in the gap a little bit and be closer to the look I am trying to achieve. I like the tire/stance of the OEM wheels.

That said, should replacing the tires HRE sold me with the OEM tires be the best solution here?

I reached out to the HRE rep and he said:
Question though, is your GT3 lowered, or at the factory height? The fitment we went with on your vehicle specifically is what is called our F1 Fitment, this is what all customers go with unless requested otherwise. On a vehicle like a GT3, the fitment is already so tight from factory, there is not a ton of wiggle room. The rear tire (315/30-21) does have some stretch to it when mounted on a 21x12.50, but that’s due to the tire availability and what’s out there. The 325/30-21 would not meet any of Michelin’s standards, so we are stuck with the 315/30-21.

He is going to do more research on this situation and get back to me tomorrow.

Here are more photos for those that requested them:





richiele23,
Yes I think if you go with OEM Michelin Cup 2 tires you will be fine. The rear Cup 2 OEM (N0) tire is enormously wide for a 315mm wide tire. Per tirerack the tread width is 12.0"! This is perfect for your 12.5" wide wheels (it is recommended for only up to 11.5" as shown below but it is really only the thread width that really matters). The PS4s thread width is only 10.8" and stretched way past where it should be (this would have a good chance of unseating).
https://www.tirerack.com/tires/tires...3&autoModClar=


Last edited by cptcolo0; 08-30-2024 at 04:47 AM.
Old 08-30-2024, 06:19 AM
  #51  
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Originally Posted by richiele23
I reached out to the HRE rep and he said:
Question though, is your GT3 lowered, or at the factory height? The fitment we went with on your vehicle specifically is what is called our F1 Fitment, this is what all customers go with unless requested otherwise. On a vehicle like a GT3, the fitment is already so tight from factory, there is not a ton of wiggle room. The rear tire (315/30-21) does have some stretch to it when mounted on a 21x12.50, but that’s due to the tire availability and what’s out there. The 325/30-21 would not meet any of Michelin’s standards, so we are stuck with the 315/30-21.





I totally think it is an offset issue mixed with your choice of wheel style. My 20/21 HRE Classic 300’s have a more aggressive offset and the wheel widths are the same as yours. HRE called it the “high offset profile”. My wheels would poke if my car weren’t lowered.




Last edited by M3Inline6; 08-30-2024 at 06:21 AM.
Old 08-30-2024, 07:26 AM
  #52  
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Originally Posted by ipse dixit
I don't think those wheels look good on a GT3.
I agree. Especially since I find the stock 992 GT3 wheels to be as beautiful as they get.
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Old 08-30-2024, 07:34 AM
  #53  
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Originally Posted by richiele23
Sheesh, thank you everyone for your replies and input. Noted about not lowering the rear.

J Irwan - I did take a look at my tires and they are in fact AML. When I look at them from an angle, they do like they are "leaning" inward, as you gusys say stretched. I think if the wall were going straight up it would fill in the gap a little bit and be closer to the look I am trying to achieve. I like the tire/stance of the OEM wheels.

That said, should replacing the tires HRE sold me with the OEM tires be the best solution here?

I reached out to the HRE rep and he said:
Question though, is your GT3 lowered, or at the factory height? The fitment we went with on your vehicle specifically is what is called our F1 Fitment, this is what all customers go with unless requested otherwise. On a vehicle like a GT3, the fitment is already so tight from factory, there is not a ton of wiggle room. The rear tire (315/30-21) does have some stretch to it when mounted on a 21x12.50, but that’s due to the tire availability and what’s out there. The 325/30-21 would not meet any of Michelin’s standards, so we are stuck with the 315/30-21.

He is going to do more research on this situation and get back to me tomorrow.

Here are more photos for those that requested them:

There you have it, the tire is the main culprit here. They sold you the wrong tire. It is amazing how many so called pro shops understand little about tires.

As I posted before, I strongly recommend the 991.2 GT2/3RS N2 spec PSC2 in 265/35R20 and 325/30R21 sizes since they are specifically designed to be installed on 9” and 12.5” wide wheels. You will get the best performances and looks from those tires. The rears carry a massive 12.8” tread width, these will properly fill your wheel wells.

Last edited by CanAutM3; 08-30-2024 at 07:35 AM.
Old 08-30-2024, 11:47 AM
  #54  
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These look like 3 piece wheels, Make the HRE Rep get you wider outer lips to have the wheel sit more flush with the fender and then go with a 325 tire.
Old 08-30-2024, 02:36 PM
  #55  
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I stayed with 12' on the same rim, with a bit more aggressive offset and factory tires size.

Could not be more flush


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Old 08-30-2024, 03:21 PM
  #56  
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Originally Posted by tvurt
I stayed with 12' on the same rim, with a bit more aggressive offset and factory tires size.

Could not be more flush
What offset?

I don't see how OPs wheel could be .5" wider with the off set only 3mm higher and wind up with his fitment.

OP the sizing should be engraved in the back. Maybe you can take a look and see if it is et 48 and 12.5.
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Old 08-30-2024, 07:56 PM
  #57  
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Originally Posted by richiele23
Sheesh, thank you everyone for your replies and input. Noted about not lowering the rear.

J Irwan - I did take a look at my tires and they are in fact AML.
Originally Posted by cptcolo0
richiele23,
Yes I think if you go with OEM Michelin Cup 2 tires you will be fine. The rear Cup 2 OEM (N0) tire is enormously wide for a 315mm wide tire. Per tirerack the tread width is 12.0"! This is perfect for your 12.5" wide wheels
Or they could've picked the Panamera Porsche ND0 version which is 11.4" wide tread width. If it holds like normal Porsche spec (similar to the GT3 spec ones) it might actually be wider than normally.

Whatever shop sold you this didn't do their due diligence.
Old 08-30-2024, 07:58 PM
  #58  
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Love that you all explore making your car unique. This wheel to me looks like a retro mashup BMW wheel.... You do you !

Originally Posted by tvurt
I stayed with 12' on the same rim, with a bit more aggressive offset and factory tires size.

Could not be more flush

Old 08-30-2024, 09:48 PM
  #59  
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Originally Posted by Shogunade
What offset?

I don't see how OPs wheel could be .5" wider with the off set only 3mm higher and wind up with his fitment.

OP the sizing should be engraved in the back. Maybe you can take a look and see if it is et 48 and 12.5.
I don't remember the offsets. Just checked the HRE paperwork, and they nowhere to be found. I had them push it a mil or two past their regular recommended offset.

I will have my OEMs back on soon for some track time, and can check them then.
Old 08-30-2024, 11:57 PM
  #60  
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Originally Posted by tvurt
I don't remember the offsets. Just checked the HRE paperwork, and they nowhere to be found. I had them push it a mil or two past their regular recommended offset.

I will have my OEMs back on soon for some track time, and can check them then.
It’s too bad you didn’t know to request the high offset option.


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