Anyone tried 265/30 21" front tires ?

[Porsche Taycan]

Thank you all for your comments re Taycan front tires 265/35ZR21 to 265/30ZR21, a 3.6% diameter difference.

My view: the Taycan has 2 AC motors, front and rear, controlled by a DC controller to AC pulsar.

Each motor has a controller & electronic converter with separate speed converter.

The rear axle has a 2 speed gearbox, 1:8 and 1:16 ratios to the rear wheels, not to the rear motor.

The front axle has no gearbox.

There is no difficulty for the Taycan smart computer to synchronize the speed of the 2 motors, especially in view of the 2 ratio gearbox at the rear.

I would appreciate hear comments re my view.

Thanks

________________________________________________________________

Hi,
Has anyone tried 265/30 21" front tires instead of 265/35 21" - the difference in diameter is 1" or 3.6%.
Is it considered to affect the reliability of the Taycan?

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[nischalr]

Hi,
Has anyone tried 265/30 21" front tires instead of 265/35 21" - the difference in diameter is 1" or 3.6%.
Is it considered to affect the reliability of the Taycan?

Highly discourage this, the 21" wheels/tires are already very low profile, and you would be making them even more low profile by doing this. Even though a less than 5% change can be tolerated by the car, depending on the roads near you, the ride will be worse and the chance of a puncture and bent rims go up.

 

[Dee]

Have you considered the calibration of the drivetrain?
On an awd ice it's not a thing but on a awd EV with two separate motors it is.
You'll probably wear your tires more quickly and/or damage drivetrain components and you'll loose warranty too.

 

[f1eng]

Hi,
Has anyone tried 265/30 21" front tires instead of 265/35 21" - the difference in diameter is 1" or 3.6%.
Is it considered to affect the reliability of the Taycan?

It would almost certainly prevent the motor control from working properly since the ratio of speed between front and rear axle would be way different to that expected by the controller and almost certainly stop the stability control working properly as well since the front wheels will be going too slow for the rears, which would either look like rear wheelspin or partial front axle locking to the controller.

A really bad idea IMHO!

 

[Leverage]

I wouldn’t do it. Stick to the references, there is a reason. Especially when it comes to high performance EV.

 

[Dee]

It would almost certainly prevent the motor control from working properly since the ratio of speed between front and rear axle would be way different to that expected by the controller and almost certainly stop the stability control working properly as well since the front wheels will be going too slow for the rears, which would either look like rear wheelspin or partial front axle locking to the controller.

A really bad idea IMHO!

Now that I thought about it a bit longer, I can imagine it'll be corrected by the software.
As you know electric motors can be controlled very precise.
If it detects slip, like in TC, it'll compensate the torque applied, don't you think so?
It's the same like compensating tire wear although a difference of more than 3% is a bit much...

Either way, if you'll have a drivetrain problem I don't think the warranty will cover this...

 

[f1eng]

It's the same like compensating tire wear although a difference of more than 3% is a bit much...

Exactly. It would flag errors in any non-shite SW

 

[djfrestyl]

Piggybacking this question - anyone ever go wider to square up the shape of the tire, fill out the wheel well a bit, and give the wheel a hair more rim protection?

275 up front and 315/325 in rear. Strongly considering this on Mission E’s.

 

[Ross]

Porsche, Michelin, Pirelli, Good Year and others have spent millions of Euros testing and developing NFO labelled tyres for a unique, high powered and technologically sophisticated car.
Take advantage of all that research by fitting NFO tyres. Only.
Do not reinvent the wheel.

 

[Raphie]

Exactly! No non NFO on the Taycan.

 

[DerekS]

Exactly! No non NFO on the Taycan.

Michelin PS4S are not N-rated. I will absolutely fit them (again) soon when the P-Zeros on my GTS burn up.

 

[Raphie]

The NFO’s have different walls especially for Porsche camber. It’s not just marketing, it’s design.
I’m a Michelin Pilot Sport 4s fan too, but unless they come with a NFO design I’ll skip them for the Taycan.

 

[Vercingetorix]

Porsche, Michelin, Pirelli, Good Year and others have spent millions of Euros testing and developing NFO labelled tyres for a unique, high powered and technologically sophisticated car.
Take advantage of all that research by fitting NFO tyres. Only.
Do not reinvent the wheel.

The problem is what they are researching and testing for may not be what I am looking for. They went with garbage Procontact RXs didn’t they? Pilot Sport 5, Assymetric 6, Continental Sport Contacts are all newer and in the first 2 cases replaced the NF0 tires.

 

[Vercingetorix]

This is what’s wrong with sticking to NF0.

 

[DerekS]

The NFO’s have different walls especially for Porsche camber. It’s not just marketing, it’s design.
I’m a Michelin Pilot Sport 4s fan too, but unless they come with a NFO design I’ll skip them for the Taycan.

You're missing out. The XL load rating is what matters, which they have.

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