Non NFO approved tires?

[Climax_F82]

Hello, i'm curious to know if anyone has replaced their original tires with tires that are non NFO (electric vehicle approved) tires?

I'm going with a set of aftermarket wheels and was wanted to go for a size 265/35/20 and 305/35/20. But my Tire Rack rep informed

me that if I go with non approved tires for electric vehicles, that the range will diminish. So i'm curious to know if anyone have noticed a significant loss in range after switching tires.

Thank you.

Sponsored

 

[chrisk]

Besides the difference in rolling resistance, I think range will drop because the size you are looking at is wider (by 20mm each) than the 20 inch OEM. Btw are you sure these are 20 inch and not 21?

 

[tutis]

My 2c here.. I have a 991.1 Carrera that has over 110k miles on it, I drive it everywhere. For peace of mind I have the Porsche extended warranty which costs about $3,500 for every two years, not cheap.
Earlier this year my PDK gearbox started making weird noises. The dealer diagnosed a faulty gearbox that needed replacement with approval from warranty department at the factory. The factory asked the dealer to check the tyres on my car; I had a set of PS4S all around.

To my surprise, the front tyres were rated M0 (for mercedes), whilst the back were rated N0 (Porsche). It seems the garage I use for tyre swaps made an honest mistake and put on M0, instead of N0. The dealer told me that the warranty for the PDK replacement wouldn't be allowed to go through because the car was not running on approved tires, and such unapproved tyres can put unwarranted stress on the chassis, gearbox etc.

Thankfully my 911 is a RWD model and I was able to argue that the front tyres had no impact whatsoever on the PDK gearbox, and the warranty replacement was approved. The dealer told me that any modifications on Porsche cars that are not OEM will nullify parts of the warranty affected by the modification. Lower springs, not OEM tyres, wider rims, etc. etc. all void warranty.

So put some different tyres on if you want to, but be warned that any problem with gearbox, control arms, shocks, etc. will not be covered by warranty repairs.

 

[Vercingetorix]

My 2c here.. I have a 991.1 Carrera that has over 110k miles on it, I drive it everywhere. For peace of mind I have the Porsche extended warranty which costs about $3,500 for every two years, not cheap.
Earlier this year my PDK gearbox started making weird noises. The dealer diagnosed a faulty gearbox that needed replacement with approval from warranty department at the factory. The factory asked the dealer to check the tyres on my car; I had a set of PS4S all around.

To my surprise, the front tyres were rated M0 (for mercedes), whilst the back were rated N0 (Porsche). It seems the garage I use for tyre swaps made an honest mistake and put on M0, instead of N0. The dealer told me that the warranty for the PDK replacement wouldn't be allowed to go through because the car was not running on approved tires, and such unapproved tyres can put unwarranted stress on the chassis, gearbox etc.

Thankfully my 911 is a RWD model and I was able to argue that the front tyres had no impact whatsoever on the PDK gearbox, and the warranty replacement was approved. The dealer told me that any modifications on Porsche cars that are not OEM will nullify parts of the warranty affected by the modification. Lower springs, not OEM tyres, wider rims, etc. etc. all void warranty.

So put some different tyres on if you want to, but be warned that any problem with gearbox, control arms, shocks, etc. will not be covered by warranty repairs.

This really does not apply in the USA.
https://en.wikipedia.org/wiki/Magnuson–Moss_Warranty_Act
And specifically:
Warrantors cannot require that only branded parts be used with the product in order to retain the warranty.[7] This is commonly referred to as the "tie-in sales" provisions[8] and is frequently mentioned in the context of third-party computer parts, such as memory and hard drives.

It would be very tough for Porsche to prove a non-NFO tire caused any problems at all.

 

[Vercingetorix]

https://www.motor1.com/news/532869/ev-tire-comparison-real-advantages/

 

[Climax_F82]

Thank you guys for all your response. I'll continue to look around for the size I want that are approved for EVs. I only need to do a 198 mile trip once in a while. That is only when I need to visit my in laws. So maybe i'll try the trip once on NFO tires and another that are just NO or N1 rated tires.

 

[Climax_F82]

Besides the difference in rolling resistance, I think range will drop because the size you are looking at is wider (by 20mm each) than the 20 inch OEM. Btw are you sure these are 20 inch and not 21?

True. Yes, i'll be going 20x9 and 20x11.
245/45/20 shows that it fits up to a 9" and
285/40/20 shows that it fits up to a 11"
Both Michelins NFO tires, but i didn't want to try and stretch the tires that high.

 

[Fish Fingers]

I had a link to this video in the magazine article above (not sure if that was personalised?).
It's a new video - only 2 days old.

Really interesting. I will definitely be sticking to EV tyres going forward - and the PS4 are probably the best tyres around anyway.

 

[Vercingetorix]

Tire Rack recommends non NFO tires:
They must differentiate between NFO and tires for electric vehicles. These are ecoimpact which are fuel saving/good for the environment. These do not appear to be designed for electric vehicles.

 

[F16HTON]

If anyone wants to go with NF0 electric spec, I purchased my 21" Pirelli's from Tag Motorsports and they were shipped to me for much less than the Tire rack retail pricing.

Tire rack today shows the set of four at $1638.60 plus shipping ($166.51). I paid $1434.00 shipped.

 

[Climax_F82]

If anyone wants to go with NF0 electric spec, I purchased my 21" Pirelli's from Tag Motorsports and they were shipped to me for much less than the Tire rack retail pricing.

Tire rack today shows the set of four at $1638.60 plus shipping ($166.51). I paid $1434.00 shipped.

That's a really good price. Considering dealer pricing is about $1,348 for those PZero's

 

[Vercingetorix]

Interesting article on OEM tire approvals.
https://www.tire-reviews.com/Article/How-Tires-Change-For-OE-Approval-the-P-Zero-Story.htm

 

[Climax_F82]

Interesting article on OEM tire approvals.
https://www.tire-reviews.com/Article/How-Tires-Change-For-OE-Approval-the-P-Zero-Story.htm

That was a good read, thank you.

My wheels are arriving on Monday, and decided to just go with the Michelin OE NFO tires for the 20s.
The car won't arrive until December so i still have some time haha.

Sponsored