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MYP 21' Michelin Pilot AS4 Sizing

janjablonski

Member
Aug 16, 2020
25
29
Chicago
Toying with the idea of ordering a MYP and doing some due diligence before I pull the trigger. From what I've read on here, it appears one of the best All-Season tire options to swap with the stock Uberturbines w/ Pirelli Summer Tires (I live in a cold/snowy winter area) are the Michelin Pilot AS/4? Thinking of purchasing these and swapping them with the stock tires not long after delivery and before the winter hits. Seems like the easiest, most cost effective option as opposed to buying and storing an entire winter tire set.

I'm a total tire noob, so hoping someone can confirm that these are the correct tires/sizes (if I'm trying to match stock) and that it is as simple as taking it to a tire shop and having them swap them out with the stock wheels.

1630379711926.jpeg


Thanks in advance
 

jebinc

MSM Model S PLAID, cream/FSD; MYP, white on white
Supporting Member
Jun 19, 2019
7,602
10,637
Seattle area
I just had the AS4s installed on my MYP today and they are great so far!

265/35R21 up front and 275/35R21s in the rear

Planning to keep an eye on the Wh/mi to see how these tires compare to the efficiency of the stock Pirellis.
@ERAUGrad04 Please let us all know what you conclude, noise level wise and efficiency wise. How's the comfort level of the ride?
 

jpy1980

Member
Jul 17, 2021
369
654
Los Angeles
I just had the AS4s installed on my MYP today and they are great so far!

265/35R21 up front and 275/35R21s in the rear

Planning to keep an eye on the Wh/mi to see how these tires compare to the efficiency of the stock Pirellis.
Why the quick change of tires? You haven't had the car for very long?
 

AFGolf96

Member
Sep 5, 2021
7
9
Virginia
Mines 13k miles my rears already bald. MYP as well. I am going 265 fronts as well since the 255 are in pre production.
My stock Pirellis only lasted 14k miles too... After what felt like lots of research, I swapped both the wheels and tires to martian 20x9.5 with 275/40/20 on all corners
 

ERAUGrad04

Member
Jul 13, 2021
65
125
Bay Area
@ERAUGrad04 Please let us all know what you conclude, noise level wise and efficiency wise. How's the comfort level of the ride?

So far, they are great! I’ve put about 400mi on them and would say they are are great alternative to the P Zeros.

In terms of noise, I would say they are really close to the stock tires. Measured on my Apple Watch at 68mph on the same stretch of road, I’m seeing about 1dB higher on the Michelins (63-64dB vs 62-63dB).

Efficiency will take some time for a good comparison. I reset one of the trip meters so that I can compare after ~1800mi. The stock P Zeros after 1800mi were at 287wh/mi. So far, after 400mi of driving, the Michelins are at 302wh/mi, however, the driving has not been identical. I’ll be sure to report back after 1000mi+ with a better average.
 
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ERAUGrad04

Member
Jul 13, 2021
65
125
Bay Area
Why the quick change of tires? You haven't had the car for very long?

Had the car only a month or so, however, I will be using the car to head up to Tahoe this winter for some skiing and the stock P Zeros won’t do so well for those trips. A friend offered to buy the take-off stock tires, so I figured I’d make the swap a few months early!

I considered having a second set of wheels and tires, but in the end, not having to swap wheels was the easy button!
 
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jpy1980

Member
Jul 17, 2021
369
654
Los Angeles
Had the car only a month or so, however, I will be using the car to head up to Tahoe this winter for some skiing and the stock P Zeros won’t do so well for those trips. A friend offered to buy the take-off stock tires, so I figured I’d make the swap a few months early!

I considered having a second set of wheels and tires, but in the end, not having to swap wheels was the easy button!
Did you buy the Tesla chains for the ubertine wheels? What are you going to do when it dumps snow? This is my dilemma now as I want to take my Y to the snow but my 21s are making me consider getting a second set of wheels.
 

jebinc

MSM Model S PLAID, cream/FSD; MYP, white on white
Supporting Member
Jun 19, 2019
7,602
10,637
Seattle area
Did you buy the Tesla chains for the ubertine wheels? What are you going to do when it dumps snow? This is my dilemma now as I want to take my Y to the snow but my 21s are making me consider getting a second set of wheels.
I got a second set of wheels - a “take-off” complete set of Geminis off of a new LR from another TMC member.
 
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ERAUGrad04

Member
Jul 13, 2021
65
125
Bay Area
Did you buy the Tesla chains for the ubertine wheels? What are you going to do when it dumps snow? This is my dilemma now as I want to take my Y to the snow but my 21s are making me consider getting a second set of wheels.
No chains. The AWD on the Y is incredible. With solid AS tires, it should perform really well.

All that said, I’m not planning to make the drive if the weather is planned to be crap. I drove many winters in Chicago in 2wd vehicles with no chains and did just fine. Figure the AWD paired with good tires should do pretty well.
 
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Wingwinghello

Member
Feb 17, 2020
80
168
Austin
I put AS4 on my LR Y and didnt notice how much road noise there was until I went back to the stock Contis. I will be putting the same AS4 on my new MYP coming here soon.
 
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Megabrode

Member
Jun 17, 2021
13
19
Richmond, VA
My stock Pirellis only lasted 14k miles too... After what felt like lots of research, I swapped both the wheels and tires to martian 20x9.5 with 275/40/20 on all corners
I'm up to 6K miles already and may do this, as well, when the rears go. Any photos??? How has the ride & handling changed, if at all? Any effect on range?
 
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