So I found an old tweet by Elon that reducing the tire pressure to 39 would soften the ride but lose some range. I have the 21 Uberturbines. Has anyone tried this yet and if so what was range loss? Currently running at 45 psi and ride is hard.
Elon's Tweet on Tire Pressure
- Thread starter LasVegas2019
- Start date
Curious about this on the Induction wheels as well. If anyone can post their PSI.
MrTemple
Member
Drop 3 or 4psi. It’s a no brainer.
Running at the door sticker on ANY vehicle will make for a VERY sharp and bumpy ride.
They do that because that’s what the EPA uses for mileage tests (gas or electric), and it squeezes out a bit more range at low speeds. (At high speeds plowing through air blows that change out of the water.)
I dropped my Inductions to 38psi (cold) from the door-rated 42psi and the ride is so much more comfortable.
Haven’t noticed any change in handling. Tires look equally inflated. 38psi is still plenty to avoid wear issues.
Haven’t noticed any change in real-world efficiency (though haven’t tested it), so it’s probably under a percent or two tops. Which is unnoticeable for daily driving, and only going to mean at the most 0.5-1% lower supercharger arrival on road trips, which works out to under a minute more charging.
So even on road trips I’ll probably leave it. I can’t imagine I’d trade 8 hours of comfort to save half a minute on a road trip.
(IMPORTANT: Always measure and adjust cold tires before driving! 38psi cold can be 42psi or more after driving on a mild day.)
Running at the door sticker on ANY vehicle will make for a VERY sharp and bumpy ride.
They do that because that’s what the EPA uses for mileage tests (gas or electric), and it squeezes out a bit more range at low speeds. (At high speeds plowing through air blows that change out of the water.)
I dropped my Inductions to 38psi (cold) from the door-rated 42psi and the ride is so much more comfortable.
Haven’t noticed any change in handling. Tires look equally inflated. 38psi is still plenty to avoid wear issues.
Haven’t noticed any change in real-world efficiency (though haven’t tested it), so it’s probably under a percent or two tops. Which is unnoticeable for daily driving, and only going to mean at the most 0.5-1% lower supercharger arrival on road trips, which works out to under a minute more charging.
So even on road trips I’ll probably leave it. I can’t imagine I’d trade 8 hours of comfort to save half a minute on a road trip.
(IMPORTANT: Always measure and adjust cold tires before driving! 38psi cold can be 42psi or more after driving on a mild day.)
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Flybuddy
Member
The ride on low profile tires will not improve much with lower pressures due to stiffness. Pressures listed on the sides of tires are for max weight and generally well over recommended door sticker pressures. (you might want to add pressure for towing or higher than normal loads in vehicle). Lower pressures do add more flex to the tire. Here's a video of a gopro inside a tire.
MrTemple
Member
True, but 4” sidewall is not exactly low profile.
You DEFINITELY feel the difference with the Inductions.
YMMV
Got Misty with 40.5 pressure, looks a bit deflated to me, bumped to 45 anticipating it will be not 90F quite soon, and didn't notice difference so far. Inductions.
I went down to 39 and there is a noticeable difference from 42. Much better ride. I have the 21 Uber's
