Upsizing to bigger tires - will speedometer and range auto adjust?

[Nidavellir]

If the Cybertruck comes with 35" tires and you replace them with 37" tires, will the speedometer and range correct itself?

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[IronStation]

If the Cybertruck comes with 35" tires and you replace them with 37" tires, will the speedometer and range correct itself?

As far as I know it would be off by 1 mph or 2. Don't believe the software accounts for tire size change.

The bigger question is if it would impact brake/suspension/drivetrain warranty at all?

 

[Don Kedick]

No. I’ve read somewhere the service center can recalibrate for the tire size you put on the car though.

 

[cvalue13]

If the Cybertruck comes with 35" tires and you replace them with 37" tires, will the speedometer and range correct itself?

don’t forget all the sensors for autopilot FSD etc

 

[dempster]

I imagine it will be similar to the current tire size selection available in the cars

 

[cvalue13]

I imagine it will be similar to the current tire size selection available in the cars

sorry I’m confused those are wheel size selections, no?

 

[dempster]

sorry I’m confused those are wheel size selections, no?

Yeah, that's true. They're the sizes offered by Tesla.

Hopefully with the truck they provide more options in that menu

 

[scottf200]

sorry I’m confused those are wheel size selections, no?

Wasn't the OP asking if the vehicle auto-adjusted for size?
So isn't that dialog clear that Tesla needs you to manually pick a diff size so it can recalculate?
Obviously there is a looks (rim style) aspect for the UI graphics but it seems the size is key too.
Aside: In fact it changed recently where that dialog would reboot more subsystems than a two-finger reboot and it was a work around in some case. Now that dialog is a few seconds vs a minute.

 

[HaulingAss]

On our Model 3's, driving a few blocks after I swtch from summer to winter tires, of exactly the same size wheels and tires, a dialog box pops up asking me to confirm the new tires. The system is incredible in its ability to sense a new set of tires, even when they are almost identical in size.

It's not only the tire size that the car takes into account, its also whether they are summer or winter tires! I think this is why the traction control is so precise and fast-acting when driving on icy roads, the system is just very sensitive, in a good way.

Come to think of it, I think it must be detecting the new tire pressure sensors!

 

[cvalue13]

Wasn't the OP asking if the vehicle auto-adjusted for size?
So isn't that dialog clear that Tesla needs you to manually pick a diff size so it can recalculate?
Obviously there is a looks (rim style) aspect for the UI graphics but it seems the size is key too.
Aside: In fact it changed recently where that dialog would reboot more subsystems than a two-finger reboot and it was a work around in some case. Now that dialog is a few seconds vs a minute.

I may just be missing the point

but OP asked about about changing tires from 35” to 37”

essentially irrelevant to what’s shown on the Tesla, changing wheel size

if the point is merely that ‘if Tesla can give options for changes in wheel size, they could also give options for changing tire size’ then .. ok

 

[Regenshire]

Come to think of it, I think it must be detecting the new tire pressure sensors!

Yeah, that sounds like the senser pairing pop-up. It requires you to drive around a bit for it to popup.

 

[dempster]

I may just be missing the point

but OP asked about about changing tires from 35” to 37”

essentially irrelevant to what’s shown on the Tesla, changing wheel size

if the point is merely that ‘if Tesla can give options for changes in wheel size, they could also give options for changing tire size’ then .. ok

It's not like those different wheel/tire configurations all magically have the same outer diamater though? the car's already compensating based on your selection. I thought that was the OP's question.

an uberturbine 20" wheel, with the rubber is a larger OD than say the 18" aero with tire.

 

[Nidavellir]

Yes. There are 2 types of changes that can occur. Rim size and/or tire size. I am asking about not changing the rim size, only the tire size.

 

[cvalue13]

It's not like those different wheel/tire configurations all magically have the same outer diamater though? the car's already compensating based on your selection. I thought that was the OP's question.

an uberturbine 20" wheel, with the rubber is a larger OD than say the 18" aero with tire.

admit I don’t know the detail assumptions behind the Tesla UI you’re showing.

but my assumption is, the UI is showing a ‘wheel / tire package’ offered by Tesla, and the UI is using the wheel as proxy for the known wheel/tire package

Quite different from that is OP is asking if he can take off the 35” tires offered by Tesla, and instead put on aftermarket 37” tires (whether with or without stock or aftermarket wheels)

In other words, that Tesla knows what wheel/tire packages it offers for sale with a given unit, and prepares the cars for accepting those, seems nearly unrelated to OPs question

(And, noting that in the case of a truck and moving from 35”-37” tires, we’ve not even broached whether the vehicle can MECHANICALLY accept 37’s, before we ever get to the Speedo adjustment issue. For reference point, Ford had to redesign suspension and fascia to offer the raptor in 37’s)

 

[Rutrow]

The answer is probably no, but Tesla's UI means that it doesn't have to be, even if, at the current time, it is. Tesla wheels have speed sensors, that are likely the source of the vehicle's speedometer, but don't necessarily have to be. They are needed for ABS and Traction Control purposes, but the existence of speed displays that aren't connected to the car (Waze, V-box, Draggy, etc.) indicates that Tesla COULD program its UI to correct for inaccurate speed calculations.

Just using wheel sensors for speed determination is fraught with problems: Tread wear, tire pressure, payload, etc. will make the readings inaccurate. Usually to such an insignificant extent that they can be ignored, but inaccurate they are. Changing tire size is one of those variables that have a much greater impact. If Tesla would (maybe they have ) compare its GPS navigation distance/speed results against those from the wheel speed sensors, they could recognize a discrepancy and either automatically adjust for it, or at least bring up warning/caution message that the readings may be off. If they did this, then changing tire size would be easy to adjust for.

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