Another world first: large 22/23” wheel with an aftermarket tire

[037]

I am back with another world first…because I wasn’t going to stop until I got Porsche level braking for this max performance family missile.

I traded my small 20/21 wheel and tire for a large wheel, except after 8k the tires were 4-6/32, wasn’t worth the install cost so I replaced them.

Went with Goodyear Eagle F1 Asymmetric 6 in 275/40/22 and 295/35/23

Naturally I brake tested them against my previous wheel and tire as well as compared to stock data on Dream with a large wheel and Touring on the small wheel.

As seen in my Got Boost post

“
My prior Gravity braking records are:

70-0

1. Michelin All Season 4 265/285 - 162ft

2. Michelin All Season 4 295/285 - 157ft

60-0

1. Michelin All Season 4 265/285 - 115ft

2. Michelin All Season 4 295/285 - 117ft

And today Goodyear Assymetric 6 275/295 on stock 22/23”

70-0

152ft

60-0

110ft

So, what does that even mean? The stock Lucid PZ5 which are 3k plus go 70-0 in 162ft so even the Michelin AS4 can compete there.

How about the stock efficiency tire?

Fitted to a Touring which is 400-500lb lighter

70-0 in 170ft

As you add weight the braking gets worse, going faster exponentially increases braking distance.

100mph requires twice as much space to slow down as 70mph.

Please consider the braking distances when launching your family max performance missile and stay safe.”

Adding a photo of Cayenne EV Turbo for Porsche comparison. Of note, it’s got a stickier tire and a lot less weight.

 

[drb3333]

Really glad you posted those numbers. Many thanks.
If you have ever found yourself on a freeway engaged in a smoking, sliding, emergency panic stop, those last 5-10 feet are everything.
And even if you don't quite make it down to a complete halt, your impact energy is vastly less. Good stuff.

 

[037]

Really glad you posted those numbers. Many thanks.
If you have ever found yourself on a freeway engaged in a smoking, sliding, emergency panic stop, those last 5-10 feet are everything.
And even if you don't quite make it down to a complete halt, your impact energy is vastly less. Good stuff.

Those tires are also 50% cheaper and 6lb lighter than Lucid spec PZ5.

If you are on the 20/21 efficiency tire let me know what the 30 foot difference feels like.

Also…the middle tire is also terrible at braking.

 

[ClearlyLucid]

What’s the trade off with the EV specific PZ5’s? The Goodyear Eagle F1 Asymmetric 6‘s are wider, lighter, and cheaper. Is it noise? Some other handling performance besides braking distance? Range?

 

[037]

What’s the trade off with the EV specific PZ5’s? The Goodyear Eagle F1 Asymmetric 6‘s are wider, lighter, and cheaper. Is it noise? Some other handling performance besides braking distance? Range?

PZ5 is what Lucid tuned for. They have the foam so I assume they should be quieter, the foam also adds 6lb across the 4 wheels and the customization might be doubling their price (or maybe they charge what they can get away with).

I don’t have personal PZ5 experience apart from seeing an 8k set at 4-6/32nd of wear.

 

[drb3333]

I think load-range is the main thing to watch out for. EVs are heavy and fast.

 

[Need4Sleep]

Cool findings!

What other experiments do you plan for more performance? Dropping unsprung mass with forged wheels? Or go even crazier with carbon fiber wheels?

 

[ClearlyLucid]

When you put the winter tires back on you’ll have to let us know if you see any evidence of rubbing.

 

[037]

I think load-range is the main thing to watch out for. EVs are heavy and fast.

These are both 108Y which is 2200lb per corner. It is at or above spec for max gross vehicle weight. 265s front are 106Y which is still a solid 2100lb.

Weight consideration and safety always front and center with this monster.

 

[037]

Cool findings!

What other experiments do you plan for more performance? Dropping unsprung mass with forged wheels? Or go even crazier with carbon fiber wheels?

My after market black 22x10 are 31lb each vs 38/40 for the stock large wheels.

I haven’t done any acceleration tests to see if extra weight slows me down but the vehicle is fast enough for me.

I did consider carbon wheels off a Land Rover, would have ran $8500 used but they were 23s and I didn’t want to lose more sidewall as carbon wheels shatter vs bend…I’m not ready to have a wheel shatter yet. I did think about it tho!!

 

[drb3333]

These are both 108Y which is 2200lb per corner. It is at or above spec for max gross vehicle weight. 265s front are 106Y which is still a solid 2100lb.

Weight consideration and safety always front and center with this monster.

Absolutely--you are focussing on the right thing. I did note some of those tires are spec'ed for lower top speed, I believe (may have skimmed it too fast).

 

[037]

When you put the winter tires back on you’ll have to let us know if you see any evidence of rubbing.

Will be on the lookout for that but I think the tires would have signs possibly sooner. I don’t think a 5mm width increase went outside the safety margin.

I did notice the speedometer is casually 1-2 miles higher than Dragy GPS indicated speed and as I approach 100mph the difference goes 0-1. Since the tire gives me a 1% error that leads me to believe Lucid speedometer is too optimistic and bigger tire at higher speeds makes it more honest…

 

[037]

Absolutely--you are focussing on the right thing. I did note some of those tires are spec'ed for lower top speed, I believe (may have skimmed it too fast).

That’s correct, same tire in same size is available with an H rating which is max speed 130

 

[ClearlyLucid]

Will be on the lookout for that but I think the tires would have signs possibly sooner. I don’t think a 5mm width increase went outside the safety margin.

I did notice the speedometer is casually 1-2 miles higher than Dragy GPS indicated speed and as I approach 100mph the difference goes 0-1. Since the tire gives me a 1% error that leads me to believe Lucid speedometer is too optimistic and bigger tire at higher speeds makes it more honest…

I put a square wheel setup on my M5 instead of staggered. I had to add a 5mm spacer and longer lug bolts on the front, otherwise the tire would rub on the fender liner when the steering wheel was rotated near lock.

 

[037]

I put a square wheel setup on my M5 instead of staggered. I had to add a 5mm spacer and longer lug bolts on the front, otherwise the tire would rub on the fender liner when the steering wheel was rotated near lock.

That happens when the offset math goes wrong.

Going wider you need to be mindful of hitting the suspension inside and fenders outside.

I went 22x10 at 30 offset vs 9.5 at 44 offset front and 10” rear at 51 offset.

My math tells me I should be able to fit an 11” in the rear at 42-44 offset.

And keeping diameter similar is very important for many reasons.

 

[Need4Sleep]

My after market black 22x10 are 31lb each vs 38/40 for the stock large wheels.

I haven’t done any acceleration tests to see if extra weight slows me down but the vehicle is fast enough for me.

I did consider carbon wheels off a Land Rover, would have ran $8500 used but they were 23s and I didn’t want to lose more sidewall as carbon wheels shatter vs bend…I’m not ready to have a wheel shatter yet. I did think about it tho!!

Understandable, there's being within reasonable bounds, and then there's eyeing a set of custom HRE carbon fiber wheels

 

[037]

Understandable, there's being within reasonable bounds, and then there's eyeing a set of custom HRE carbon fiber wheels

If you are donating a set for testing I am happy to invest the time.