Model Y Performance 21" Tires - Larger, More Comfortable Fitment Details and Experience - Michelin AS4's (With Photos)

[kpanda17]

Anyone F275 and R315?

 

[Raurele]

265/40/21
295/40/21

will update after a car wash. O.O

Congrats! the difference is noticeable, and looks great. Enjoy!

 

[ahoymody]

I recently had to replace my 2022 MYP OEM Michelin All Season 4's and after a lot of research, and tire hunting, wanted to share my experience and the direction I went. Valuable information for those close to ordering new tires. I just drive 2000 miles through Santa Cruz, San Jose, Sacramento, and did a weekend in Tahoe, driving on many dirt roads and rough roads.

First off, I will never go with another set of tires after having these. I made it to 37,000 miles with 3/32 left on all 4 tires. they wore evenly. Their performance in heavy rain and even 6" of snow was unbelievable. Ive had multiple cars with Pirellis, and always stuck with them, but was not happy with the miles I got out of them, and the thought of getting 27,000 miles on them with an EV just sounds terrible considering the price.

The Tires

I went up in size with width, and sidewall.

Stock/OEM for the MYP is:
Front: 255/35/21
View attachment 853290
Rear: 275/35/21
View attachment 853291

The tires I chose are:
Front: 265/40/21
View attachment 853292
Rear: 295/40/21
View attachment 853293
Fitment

Front wheels fully turned, there's still >1" to the inner tire well. So no rubbing at all, even with quick turns into parking lots (Where you would probably get rubbing the most)
Rear wheels haven't rubbed on any large bumps. I even tried to get them to rub. nothing.

The main bonus functionality wise is that the tires extend farther out than the rims. not much, but they do.
View attachment 853301

Look

The difference is huge. Pictures don't do it justice. When I see other MYP's now, the OEM tires look stretched and the amount of room in the tire well looks like a mistake. maybe not on the MYLR, but for a performance, the larger sidewall REALLY looks great. It creates the illusion that your car is lowered, but its actually ~1.5" higher clearance

It truly looks performance even though It can handle bumpy roads and "All Season" conditions even better.

Before:
View attachment 853299

After:
View attachment 853302
Efficiency

This part was really interesting.

Bigger tires have a higher rolling resistance than smaller tires which means they require more resistance and effort to get them rolling. However, if you do a lot of freeway driving at high speeds, larger tires can help increase your vehicle's efficiency.

So, days I drive a lot in the city with lots of stop and go, I get about 7% less range. but when I do a lot of freeway driving, I get about 7% better range.

I drive 150-350 miles a day, and have found zero difference in range because I do a wide range of road types. I really thought I'd lose range.

Feel

WOW, what a difference. Sure the suspension is still stiff, but I feel a LOT less of the small imperfections of the roads I drive on every day. even my girlfriend said she noticed it before I got to point it out. Speed bumps and things feel much better and not like im driving over a 2"x4". This is my favorite part of these tires functionality wise. Cant describe it.

There is no foam in the tires, but they are STILL quieter than the OEM with the foam. that stuffs a gimmick.

Things To Be Aware Of

Speedometer: It is not going to be accurate. Due to the larger diameter, it is off. I called Tesla, and talked to 2 different service centers, and there is nothing they can do about it. This seems like something Tesla overlooked. The only thing you can change is your rim size in your cars settings, but not the diameter...

So, when my car says im going 70MPH, im actually going 74MPH.
says 25, im going 26.5
says 40, im going 43
says 65, im going 68.5
says 85 (for AP max) im going 90.

This is something that as long as you keep in mind, it doesnt matter. I just changed my cruise control settings so it doesn't add 5MPH anymore. I chose 7% increase and it's fine.

I dont know if it's the new beta version, or that the car thinks its going slower than it is, but ive noticed that on AP/FSDbeta, it is taking turns a little wider and sometimes touches the lines on the outer edge of the turn if im going above 50mph. I'm pretty sure it's the speed issue.

This really needs to be able to be corrected by the user in the settings. sometimes switching brands can add .5in of diameter even if the tire is the same "size".

Conclusion:

Go Bigger! the OEM tires are actually stretched on your Uberturbines. they are meant for wider tires but Tesla went smaller for efficiency reasons, which in the end, didn't matter. Finding the OEM sizes of these wonderful tires is basically impossible. They are on a national backorder right now which is why I went for a different size in the first place. These tires arent cheap, but they ARE worth every penny.

American tire warned me that they weren't OEM sizes, and I told them I know for a fact they will fit and they had no problem installing them.

Here's some more pictures just for fun. These are some CHONKY tires. Thicc with 2 "C"s. tiny American tire man for reference.
View attachment 853304View attachment 853305

Great write up, thanks!

 

[J_nobear21]

Very comfortable drive

 

[kpanda17]

Would be great to hear from someone that did 315s on rhe rear of rhe MYP

 

[bpobill]

265/40/21
295/40/21

will update after a car wash. O.O

I need tires for my myp. I bought a set of geminis off marketplace for $300 and they were basically new. I actually ordered 255/50/19 tires for them today because I hate the harsh ride on the 21’s and cost was insane.

how much better is the ride compared to stock?

I checked prices and tires are cheaper than stock size. So this is tempting.

 

[J_nobear21]

I need tires for my myp. I bought a set of geminis off marketplace for $300 and they were basically new. I actually ordered 255/50/19 tires for them today because I hate the harsh ride on the 21’s and cost was insane.

how much better is the ride compared to stock?

I checked prices and tires are cheaper than stock size. So this is tempting.

My sister has a long range model y with stock Gemini so I know what the 19 drives like. This is way better.

 

[bpobill]

My sister has a long range model y with stock Gemini so I know what the 19 drives like. This is way better.

How does the wider tire and taller sidewall compare to the stock tires on the 21s? Is the ride less harsh and less jarring when hitting a pot hole or bumps?

 

[J_nobear21]

How does the wider tire and taller sidewall compare to the stock tires on the 21s? Is the ride less harsh and less jarring when hitting a pot hole or bumps?

like cruising in my model x on the highway. less harsh in the city. minimum 50% less bumpy. Your car will naturally be a bit higher. But still looks better than a LR.

 

[ElectricAnt54]

When my tires need replacing. I'm doing this.

 

[bpobill]

I ordered 265/40/21 and 295/40/21 in Continental DWS06. Total was $1717 from Discount Tire. I will end up selling the Gemini wheels and TPMS that I bought last week. I got a great deal on them so I will make a couple hundred bucks probably. I always hated how stretched the stock tires looked.

 

[Vanlaere]

Someone on facebook claimed this article as his (his name is Rob*** Mar***s)
You and him is a same person ?

 

[kpanda17]

On MYP did anyone state they installed
F 275 40 21 and 315 40 21?
Amy review on rhe for and ride results?
Need very slight negative camber

 

[Jecks326]

I finally made it to the end of this thread! All amazing information. Thank you to OP and everyone else that contributed.

I have my MYP being delivered in the next week or two and I’m thinking about doing this as soon as I get the car. Has it been confirmed that the 265/295 40’s won’t cause rubbing on newer models with the updated suspension? I wouldn’t think it would cause an issue, but figured I’d ask.

Also, I haven’t done the research on it yet, but how easily do you think I’d be able to offload my factory rubber? Had anyone done this recently? What was your sell price?

 

[Golfer]

Very comfortable drive

View attachment 956453

Love the Dissent gear! Reminds me of my soon to be setup. 200 series with MYP. Gotta offset that terrible gas mileage somehow lol

 

[fiehlsport]

On MYP did anyone state they installed
F 275 40 21 and 315 40 21?
Amy review on rhe for and ride results?
Need very slight negative camber

Model Y doesn't really have camber adjustment in the rear. (They technically do, but it's only a tenth or two of a degree if you loosen a bolt and wiggle the knuckle around) I wouldn't worry about alignment specs in conjunction with changing your tire sizes. It's not required. If you want to remove camber in the rear and make the tires more "straight up and down" - you'll have to buy aftermarket camber arms that allow for this adjustment.

 

[kpanda17]

Great tip thanks
Still don’t know if they will fit

Adj arms

Tesla Model Y Billet Adjustable Rear Camber Arm Set V3

Billet Adjustable Rear Camber Arm Set for Tesla Model Y allow you to improve tire longevity by correcting rear camber settings on your car.

unpluggedperformance.com

 

[MYPMando405]

Is anyone here with a MYP lowered (springs or coilovers) with 265/40/21 front?

Thanks! Love this thread btw.

 

[MYPMando405]

Is anyone here with a MYP lowered (springs or coilovers) with 265/40/21 front?

Thanks! Love this thread btw.

Found that info here if anyone is interested:

Tein coilovers and larger tires installed MYP

Had Tein coilovers installed and also swapped out my stock summer tires for all seasons. Due to limited stock on tires, I went with Pirelli Scorpion Zero 265/40/21 front and 295/35/21 rear. Prior to upgrading the tires, I was running 20mm spacers. Due to the larger tires, I had to take the...

teslamotorsclub.com

 

[Golfer]

100% both my front 275’s have inner tire weathering prob due to camber issues.

Why would a tire size change affect alignment?