Rivian won't calibrate aftermarket wheels

[Sprout]

Bummer. Those wheels look so good.

This is why I went with the 275/60R20s (from the stocks 21s). If nothing else, at least my speedo will still be pretty accurate.

The speed is actually more accurate with the 275/65R20's. According to my GPS.

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[joelster]

Thank you for the link.... very interesting and encouraging to see the Fed is siding with the people for a change.

Yes. The Right to Repair movement is definitely gaining traction.

 

[azuano3654]

It's common for vehicles where the owner changes tires to ones with a different overall tire diameter. There's more to the calibration change than just that variable though.

Some vehicles support letting the customers change the values on their own but I've never owned a vehicle that did without external computer access.

If the OP would have put 55 series tires on, there wouldn't have been a significant enough change to do anything.

When I changed from 32" to 33" tires on my Bronco I had to use the Ford Performance calibration tuner to make the change - it's not an option for Broncos via the customer settings. The dealership probably would have done it too but now that I have the tuner I can make those types of changes whenever.

 

[Sprout]

I wonder if they would be willing to give you the factory 20" wheel calibration. It'd probably be a closer match than the 21" cal.

Hard no.

 

[kizamybute']

Being that the Rivian speedometer is off 2-3 MPH from the factory, I wouldn't ask them to recalibrate if going up in tire size. Your speedo is probably close to accurate now. Which is a good thing for Driver+.

 

[Sprout]

Being that the Rivian speedometer is off 2-3 MPH from the factory, I wouldn't ask them to recalibrate if going up in tire size. Your speedo is probably close to accurate now. Which is a good thing for Driver+.

As I have stated numerous times, the speedometer is MORE accurate according to GPS. My concern is range estimates.

 

[Sprout]

If the OP would have put 55 series tires on, there wouldn't have been a significant enough change to do anything.

The size of the tire is not the issue here. It's the significant increase in weight and rolling resistance. And 275/60R20 is the same outer diameter as 275/55R21 at approximately 33"s.

 

[Dark-Fx]

The size of the tire is not the issue here. It's the significant increase in weight and rolling resistance.

Range calculations for being able to get to your destination actually already incorporate that, but since the car isn't driving the same amount of miles per unit of energy, it's not going to estimate correctly. The number on the driver's display only adjusts down until you hit the EPA rating for the tire combination programmed, but the map estimate doesn't have that same stipulation.

 

[Sprout]

Looks so so good. Can you post a pic in Standard height?

 

[dp351]

If the OP would have put 55 series tires on, there wouldn't have been a significant enough change to do anything.

Not sure if this is what’s being suggested, but we shouldn’t have to limit our choices because the OEM won’t accommodate. Our wheel & tire choices should only be limited by what will physically fit.

If there are valid reasons not to use non-OEM wheels, then this should’ve been thoroughly explained a long time ago. Rivian should understand that they’re building trucks, not Camrys.

 

[Dark-Fx]

Not sure if this is what’s being suggested, but we shouldn’t have to limit our choices because the OEM won’t accommodate. Our wheel & tire choices should only be limited by what will physically fit.

If there are valid reasons not to use non-OEM wheels, then this should’ve been thoroughly explained a long time ago. Rivian should understand that they’re building trucks, not Camrys.

Did you ever ask? Most customers won't change wheels and tires.

 

[dp351]

Range calculations for being able to get to your destination actually already incorporate that, but since the car isn't driving the same amount of miles per unit of energy, it's not going to estimate correctly. The number on the driver's display only adjusts down until you hit the EPA rating for the tire combination programmed, but the map estimate doesn't have that same stipulation.

Source?

For other EV’s I’ve owned, range is estimated from an ambiguous formula nicknamed the “Guess O Meter (GOM)”, which attempted to learn the energy consumption rate based on your driving style & other variables, and was constantly recalculating. But the EPA rating for the tires was never considered part of that equation. If it is, I’d like to know more about this.

 

[Sprout]

Range calculations for being able to get to your destination actually already incorporate that, but since the car isn't driving the same amount of miles per unit of energy, it's not going to estimate correctly.

They incorporate that, but in my case with values based on the 21" wheels/tires. I now have much heavier wheels/tires with greater rolling resistance. And that's precisely why I wanted to get them calibrated, for more accurate range estimation.

 

[dp351]

Did you ever ask? Most customers won't change wheels and tires.

Yes I did. I asked my guide, and her answer was that they only recommend using Rivian wheels and tires, and a link to the gear shop.

 

[Dark-Fx]

Source?

For other EV’s I’ve owned, range is estimated from an ambiguous formula nicknamed the “Guess O Meter (GOM)”, which attempted to learn the energy consumption rate based on your driving style & other variables, and was constantly recalculating. But the EPA rating for the tires was never considered part of that equation. If it is, I’d like to know more about this.

Observation. On longer trips if I'm not changing my driving behavior, the estimation has been pretty accurate lately. It's gotten a lot better since earlier software. It's constantly recalculating now as well where earlier software it would only do it if you cancelled and re-routed.

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