Wireless charging Road

 

I've been experimenting with tire pressures on the EQS over the last few weeks. My priorities are ride comfort, steering feel, handling, efficiency, probably in that order.


The factory recommended settings are:

• Normal Load: 41 Front 41 Rear
• Max Load: 47 Front 43 Rear

I tried the max load setting at 47 Front 43 Rear and found the ride quality to be too stiff (for reference I'm already on run-flat tires which doesn't help anything).

I tried 43 Front 43 Rear. This wasn't too bad. I thought I liked it at first. It seemed to make the EQS feel a little lighter on its feet and I liked the steering feel but I was feeling the road a little more than I'd like from a car like this, especially on the highway.

I tried 40 Front 40 Rear. Ride quality was better but not as much as I thought it would be. The EQS was feeling a little heavier now, the steering felt a touch heavier and more numb.

I tried 38 Front 38 Rear. I found ride quality to be getting worse again. It wasn't feeling stiff but I was also feeling bumps I wasn't used to feeling. At these pressures, I'm now also concerned about long distance efficiency.

I went back to the stock 41 Front and 41 Rear and found that it really is the best of all worlds. This seemed to have the best ride quality, best steering feel, it retained the more effortless and light on its feet feeling, etc. It was just very comfortable and very well balanced. It shouldn't be too surprising as I'm sure there's a reason the engineers settled on these pressure values, but I found it really surprising how much of a difference a couple pounds of pressure makes.

 

I always find that the best balance is what the auto manufacturers recommend, so I always follow the sticker on the door. But great experiment!

 

41/41 PSI.... isn't that high? Is it because these weigh more?

 

EV tires are a bit different from regular tires. The higher inflation is for efficiency. And also yes, because of the extra weight

 

I think “high” is relative. Depends on the vehicle weight, wheel/tire size etc.

Our EQS weighs around 6200 lbs and wants 41 PSI all around.

Our Model Y weighs around 4400 lbs and wants 42 PSI all around so if anything, I’d say our Model Y is running a bit high. 🤷🏻‍♂️

 

Yeah just a pound or two of pressure makes a big difference

On a Mercedes you want to look at the fuel door (or I suppose charging flap) and use that pressure not the one on the door.

 

You can also run them at 41 with no issues, which a lot of Tesla owners do

 

It's no longer in the fuel door now. There's a color chart there that explains what the different colors mean for the charging status light. There are now (somewhat confusingly) multiple stickers by the door. It took a sec to figure out what pressures I actually need to be running

 

Apparently Elon tweeted that it could be run at 39 PSI for comfort with only a 2% range hit. But yeah I was looking on the Tesla forum and a shocking amount of people are running them at lower than recommended tire pressures. Even some running at higher than recommended for better efficiency.

 

10 psi lower than recommenced is dangerous. You won't notice in normal driving but if you are ever forced into an evasive maneuver you'll find out.

 

I just run them 42 psi, seems to be fine. Right now they are showing 44, but that's probably because I just drove 6 miles on the highway

 

Hmm interesting. Our LX570 weighs 6200 lbs as well and wants 35PSI.

You probably get better range or whatever with how they recommend it.

 

Mainly for range. Lexus tends to inflate them lower for comfort. My IS350 recommend 32/34. I used to go 36/36

 

Looks like they put the same sticker that was on the fuel door on the door jamb. It is super confusing I agree.