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Have you reduced your tire pressure?

Electroman

Supporting Member
Aug 18, 2012
6,260
6,414
TX
I always suspected that 45 psi that Tesla recommends for M3 is a tad high. Although my car doesn't ride that harsh as earlier M3, it is definitely rough than any other car I have had in the past. My 130k miles LX RX 350 rides much more smoother and quieter. Almost all of that is tire noise and I hardly have any wind noise.

And then Musk tweeted this: Elon Musk on Twitter

I have plenty of range. Too much range for everything except long distance driving. So I am thinking I will reduce the pressure to 40 psi and gladly sacrifice some range for extra riding comfort.

Anyone else done this? Do you see any improvement? perhaps a before & after water cup tests are on order ?

Most importantly do you foresee any other issues with riding it at 40 psi? perhaps more tire wear?
 

techmaven

Active Member
Feb 27, 2013
3,618
9,711
I always suspected that 45 psi that Tesla recommends for M3 is a tad high. Although my car doesn't ride that harsh as earlier M3, it is definitely rough than any other car I have had in the past. My 130k miles LX RX 350 rides much more smoother and quieter. Almost all of that is tire noise and I hardly have any wind noise.

And then Musk tweeted this: Elon Musk on Twitter

I have plenty of range. Too much range for everything except long distance driving. So I am thinking I will reduce the pressure to 40 psi and gladly sacrifice some range for extra riding comfort.

Anyone else done this? Do you see any improvement? perhaps a before & after water cup tests are on order ?

Most importantly do you foresee any other issues with riding it at 40 psi? perhaps more tire wear?

My Model 3 was delivered with 48 psi in the tires and that was definitely too high. I backed off to 42/43 psi and it's fine to me.
 
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daniel

Active Member
May 7, 2009
4,902
3,716
Kihei, HI
No complaints here about ride quality. This car has the best ride quality of any car I've ever owned. (Jeep CJ5, Honda Civic, Toyota Prius, Zap Xebra, Tesla Roadster.) The Model 3 is the closest thing I've ever had to a luxury car. :)
 

Electroman

Supporting Member
Aug 18, 2012
6,260
6,414
TX
My bad. The door indeed says 42psi. Don’t know why it was delivered with 45 and I assumed that was the recommended pressure.

I am planning to get it down to 40psi and hopefully get some relief from every crack and stone on the road.
 
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amitmishra4

Member
Apr 9, 2018
116
129
Bayonne, NJ
I’m glad I found this thread. Mine was delivered with 45-47 psi on various tires. Does backing down 3-5 psi make such a noticeable difference? Because, like the OP, I feel most cracks and imperfections in the road through the wheel. I get in my 6 year old Audi and it’s smooth to the point where absolutely no vibration gets transmitted to the wheel. While I really enjoy the sporty tight steering feel of the 3, I would definitely appreciate a slightly smoother ride.
 

03DSG

Active Member
Apr 5, 2016
2,150
2,453
Ontario
42 PSI cold. 3800 lb car with those tires should be fine at 36 to 40 psi as well.
F45C2407-3E4B-4C37-B98E-80B16F417C9C.jpeg
 

Electroman

Supporting Member
Aug 18, 2012
6,260
6,414
TX
Allright... I reduced to 40 (from 45) , and it sure makes a difference. Much better now, rather tolerable. I can live with this. Not smooth as my Lexus but acceptable. As for tire noise, I am not sure this increased it. Maybe.

On the range hit - will find out by how much.

My VIN 13k
 

Aellinsar

Member
Aug 2, 2017
241
205
Ohio
I find the comments on ride quality/noise fairly funny. I'm coming from a 2002 RSX - I'll give you a ride in that and then you can see if you describe the 3 as "harsh". :)
 

daniel

Active Member
May 7, 2009
4,902
3,716
Kihei, HI
I find the comments on ride quality/noise fairly funny. I'm coming from a 2002 RSX - I'll give you a ride in that and then you can see if you describe the 3 as "harsh". :)

Same here. I can't offer to give anyone a ride in the old Zap Xebra (I think the gummint made them recall all of them after I had sold mine, because they were so unsafe) but the Roadster is not exactly smooth. Even the Prius is not as smooth as the Model 3. I love the ride in the 3. I don't know the tire pressure. I'll check it one of these days. I'll pump them up to 45 for my summer road trip. Woo, hoo!!! I'll be able to do that trip electric for the first time ever. And the 3 is so much more comfortable than the Prius that I'm really looking forward to it.
 
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mrsandman

Member
Jan 21, 2016
123
165
Los Angeles
I’m curious to know if most people complaining have the sport wheels or if this is their first time driving a car with tires as low profile as these. The rubber on the 19” wheels are pretty thin (40 series) and you don’t normally find those on cars unless you’re talking about the performance models like BMW M3 and the Audi S4. On those models people expect tighter suspensions. Coming from a BMW M3 I would say the suspension is just as tight/stiff on the Model 3 but where I do notice a difference is with road noise. When driving on a highway with grooved lanes it is loud. Loud enough that people in the car need to raise their voice when talking. The car feels almost hollow. Perhaps softer rubber would alleviate this?
 

Electroman

Supporting Member
Aug 18, 2012
6,260
6,414
TX
..and the unscientific efficiency test results are in: My usual 40 mile morning commute typically gets anywhere between 220 - 230 wh/mile. And today it was no different. It was right at 225 wh/mile.
 
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