50% of your EV energy consumption comes from wheels and tires

[Vekke]

Grip depends on many things and wider tire on narrow wheel offers less grip. So to put widest tires won't give fastest lap times.

https://youtu.be/1MDq23scaWw?si=OxavS6BnDC5jWw32"]http://https://youtu.be/1MDq23scaWw?si=OxavS6BnDC5jWw32"]https://youtu.be/1MDq23scaWw?si=OxavS6BnDC5jWw32

And episode 2
https://youtu.be/6yvCRnZUeX8?si=4Jlc35U1IzG_9afn

[j-c-c]

And nor will a flat tire, a tire with 3x wear rating, a tire 25? years older, an overinflated tire. a flat spotted tire, etc, etc.
Regardless, a wider tire puts that puts more rubber in contact with the ground offers more grip than one with less contact.

Wet grip is directly related to amount of water present and speed, the latter totally under the preview of the driver and a distraction to this discussion.

This is becoming a silly redundant discussion, and I have no idea why.

[freebeard]

This is becoming a silly redundant discussion, and I have no idea why.

Because we can't discuss religion or politics?

For a given contact patch area, a short, wide tire will corner better while a tall, narrow tire will be more efficient.

Wet grip is directly related to amount of water present and speed...

And indirectly related to tread design and inflation pressure.

[j-c-c]

I am not sure this discussion was focused on exactly how the contact patch size was changed, beyond normal working tire pressures, wider being the most common I suspect, but I am not obsessed with cornering grip in a street application near as much as I am with stopping distance, and wider wins that hands down.

Maybe I should take my tires with me on Sunday's and pray for them to have grip, because if I narrow them, I will need others to pray for me, I think.

[freebeard]

I had a Beetle on F60-15 Polyglass tires on 8" rims for a while. Cornered like it was on rails and stopped, too. But on gravel it wouldn't do both at the same time. Too light on the steering end.

[aerohead]

The late Don Schroeder of CAR and DRIVER, who did the testing of Spindletop, at the Chrysler Proving Grounds, published results from cornering force tests he conducted on Chrysler's 300-foot skidpad.
He took a Corvette of the day, and swapped out all four wheels for space-saver, spare tires ( rubber donuts ).
The Corvette returned almost identical g-ratings, as with the 'wide' OEM rubber.
The explanation had to do with the compounding of the rubber.
And yes, the tires were only rated for 50-mph, and had a tread life of only about 50-miles, but as far as lateral grip, the section width essentially meant nothing.

[redpoint5]

I've run a donut for a couple months before, and didn't really change my driving in response. Not supposed to exceed 50, but I'd do 85 (accrued tickets in my youth).

Supposedly rough on the Subaru AWD differentials, but the car was running fine up until it was rear ended and totaled with 240k miles.

[freebeard]

Originally Posted by Vekke

Grip depends on many things and wider tire on narrow wheel offers less grip. So to put widest tires won't give fastest lap times.

Narrow tire on a wider wheel offers sharper turn-in.

[Vekke]

Found a error in my grundkörper picture calculations. Here is corrected values so in these the wheel drag is mostly higher than in the previous video.

[j-c-c]

Originally Posted by aerohead

The late Don Schroeder of CAR and DRIVER, who did the testing of Spindletop, at the Chrysler Proving Grounds, published results from cornering force tests he conducted on Chrysper's 300-foot skidpad.
He took a Corvette of the day, and swapped out all four wheels for space-saver, spare tires ( rubber donuts ).
The Corvette returned almost identical g-ratings, as with the 'wide' OEM rubber.
The explanation had to do with the compounding of the rubber.
And yes, the tires were only rated for 50-mph, and had a tread life of only about 50-miles, but as far as lateral grip, the section width essentially meant nothing.

Something tells me the whole story above has not been shared and therefore it means nothing to me.

And it's almost laughable many here how many are focused on cornering grip and lap times, both of little interest it seems to those extolling the benefits for those seeking mileage gains for street driven cars by the use of narrow tires, but will not address the direct negative safety issue of narrow tires regarding emergency stopping distances in street applications.
Typical disjointed discussions of modern times it seems.