Different tire size for 21" wheel

[Cowtownhusker]

Are theey N rated? For e car?

They are not. But they are weight/duty rated for a car like this. As you may have read, not a lot of all season options for 21s, especially nf0. I have no regrets regarding these tires.

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[SupercarSean]

Came looking for an answer on this 255/40 and 295/35 option, but specifically for winter tires. Tires are actually slight narrower than factory 21” widths and just slight taller front and rear, which is perfect for snow. FYI this size is available in the Vredestein Wintrac Pro which I run on my macan with great success.

Kudos to CowTown for being the guinea pig on this and reporting success.

 

[nischalr]

I am waiting to need some new tires and will be replacing them with Michelin Pilot Sport S 5 which is a new oem fitment for the 2025 Panamera, ND0 designation. I only need summers and this is an exciting new tire that is replacing the Michelin PS4's. Sizing will be aggressive, but I expect that it will be OK. I wish you the best with the install and hope for the best with mine at some point in the near future.

I currently have 15mm spacers on each OEM 21" wheel and it does look great with no rubbing issues. If needed, I will either remove or reduce the size of the spacers to accommodate this new tire fitment. The rolling diameter is within a margin of the OEM fitment and does not concern me.

Front:
https://www.tirerack.com/tires/tire...l=Blackwall&partnum=735YR1PSS5XLND0&tab=Sizes

Rear:
https://www.tirerack.com/tires/tire...ll=Blackwall&partnum=23YR1PSS5XLND0&tab=Sizes

As a follow up to this old thread, I have finally put on the Porsche NDO Panamera fitment 21” tires in 325/30 21 and 275/35 21 on my oem wheels in the Taycan with 15mm spacers on all 4 wheels. Michelin Pilot Sport S5 ultra high performance summer tires

There is some peace of mind that they are N rated, but I’m not an N rated evangelist, my main driving force was to get in to the Michelin pilot sport S5 the successor to the PS4S.

The new tires are currently only available in original oem fitments and not available in the general fitment sizes as of yet. This tire size combination calculates out to be a 1 percent difference in overall diameter. Well within most accepted parameters to do no harm to sensors and safety systems.

I can confidently say that, despite being a die hard Michelin fan and being pleasantly surprised at how good the OEM fitment pirelli zero summer tires were on my car as from factory, these tires are absolutely amazing. Super quiet and comfortable with endless grip. Despite not being a true “EV” tire they were designed to go with the hybrid Panamera.

Especially with the spacers, they give a great flush look with no rubbing despite rear axle steering and when in the oem GTS lowest suspension setting, don’t feel the need to do any type of further lowering as they look perfect to me. Here are some poor pictures in my garage for reference.

The effect on range is to be determined, but thankfully my use case for this car does not require maxing out the range. Dry and wet weather performance in a warm climate were my only priorities.

Please excuse the dirty car🫣

 

[mocsman]

As a follow up to this old thread, I have finally put on the Porsche NDO Panamera fitment 21” tires in 325/30 21 and 275/35 21 on my oem wheels in the Taycan with 15mm spacers on all 4 wheels. Michelin Pilot Sport S5 ultra high performance summer tires

There is some peace of mind that they are N rated, but I’m not an N rated evangelist, my main driving force was to get in to the Michelin pilot sport S5 the successor to the PS4S.

The new tires are currently only available in original oem fitments and not available in the general fitment sizes as of yet. This tire size combination calculates out to be a 1 percent difference in overall diameter. Well within most accepted parameters to do no harm to sensors and safety systems.

I can confidently say that, despite being a die hard Michelin fan and being pleasantly surprised at how good the OEM fitment pirelli zero summer tires were on my car as from factory, these tires are absolutely amazing. Super quiet and comfortable with endless grip. Despite not being a true “EV” tire they were designed to go with the hybrid Panamera.

Especially with the spacers, they give a great flush look with no rubbing despite rear axle steering and when in the oem GTS lowest suspension setting, don’t feel the need to do any type of further lowering as they look perfect to me. Here are some poor pictures in my garage for reference.

The effect on range is to be determined, but thankfully my use case for this car does not require maxing out the range. Dry and wet weather performance in a warm climate were my only priorities.

Please excuse the dirty car🫣

Thanks for the update. I have to replace my rears and I am thinking of going the same route with PS 5 in 325. My fronts as PS4S at 265, do you think not having 275 will cause an issue? Sorry for my lack of tire knowledge.

 

[nischalr]

Thanks for the update. I have to replace my rears and I am thinking of going the same route with PS 5 in 325. My fronts as PS4S at 265, do you think not having 275 will cause an issue? Sorry for my lack of tire knowledge.

I don't don't think there is any issue with the slight difference in the width of the front tires, but I do not like the idea of having two different tire designs on the car.

I feel pretty strongly that having the same tire type on all 4 wheels is critical to vehicle dynamics and safety, as the coefficient of friction, grip, sidewall stiffness will differ between different tire designs.

The Pilot Sport S5 is the successor to the Pilot Sport S4, but is really a significant overhaul in design.

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