Scorpion AS+ tire swap (from 20" Scorpion AT) - WOW big difference

[Yeti370]

I ended up ordering from TireRack and having them delivered to a local shop. We will see that this shop says about install.

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[Mikers]

I ended up ordering from TireRack and having them delivered to a local shop. We will see that this shop says about install.

Just wondering if this worked out for you? I have 18K on my all terrains, still some thread left and starting to look at options.

 

[Yeti370]

Just wondering if this worked out for you? I have 18K on my all terrains, still some thread left and starting to look at options.

Yeah. It worked out great. I had the tires shipped directly to a local tire shop. They installed them without any issues. Love them so far. Range seems to be a little less than what I was getting with the 21’s, but still better than what I would get with the ATs.

 

[waitingforrivian]

Yeah. It worked out great. I had the tires shipped directly to a local tire shop. They installed them without any issues. Love them so far. Range seems to be a little less than what I was getting with the 21’s, but still better than what I would get with the ATs.

Did you go to the service center to recalibrate mileage calculation?

 

[Yeti370]

Did you go to the service center to recalibrate mileage calculation?

No. This tire/wheel combo is the same size as the 21’s

 

[Mikers]

Did you go to the service center to recalibrate mileage calculation?

Thanks! So I am assuming you switched from 21 inch wheels to 20 inch and had 275/60/20 Pirelli AS installed? Awesome. Thinking of doing the same, but curious to see how much luck folks have with getting recalibrated, .I currently have 20 inch wheels. Now I am wishing I had done a five tire rotation, with the slight change in tire size not sure how that would effect the usability of the spare. Might just replace the spare as well and start doing five tire rotations. That means I will have a tire sitting in my garage for the rest of time.

 

[caiudalmau]

I just asked my guide what would happen if I bought a set of 21s and switched back and forth between my original 20s and the reply was that I would need to go get them recalibrated to a service center. Trying to get an answer on whether this might be a self-service option in the future.

 

[caiudalmau]

Will do. Unfortunately the earliest I could get an appt is May!

I agree re: the tires. The diameter of the 21s and the 20 AS is almost identical. It does look like switching to the 20 AS is basically giving performance equivalent to the 21s.

Have you already gone to your appointment?

I am just curious what are the downsides of what you did if it doesn't get calibrated, please correct if any of these assumptions is wrong:

1. The speedometer will show a little higher speed (3% higher in your car than the real one) Where you able to validate this against the GPS?
2. The range efficiency calculation miles/Kwh might be off showing a 3% more efficiency than the real one.
3. The cameras might be a little off. Is this affecting anything noticiable, like autopilot?

I am really planning on doing this after my new tires need to be replaced, so your experience is highly appreciated

 

[JJE]

There is no noticeable issue with the cameras. There is a 3% difference compared to GPS distance. Rivian is sending a mobile unit to do the calibration in early June. I'll post how it goes.

 

[caiudalmau]

There is no noticeable issue with the cameras. There is a 3% difference compared to GPS distance. Rivian is sending a mobile unit to do the calibration in early June. I'll post how it goes.

That's awesome, so it is basically an annoyance and not a real problem if you change it 'but don't recalibrate, right?

 

[JJE]

It is really unnoticeable. The trip/range computer juggles so many variables that the 3% difference is swallowed by other bigger variables like weather, speed and traffic.

 

[Brewbud]

The variability of the same tire size between manufacturers or can be as much as 2-3%. ie: a Scorpion 275/65 R20 is 34.1". A Yokohama in the same size 34.3". A Mickey Thompson 34.4". You can even have variability between different models with the same manufacturer.

 

[JJE]

The diameter of the Rivian 21 inch is within a millimeter of the AS+ on a 20. I think the Rivian service plan is to program the car to think it is running a 21.

 

[Joel]

The diameter of the Rivian 21 inch is within a millimeter of the AS+ on a 20. I think the Rivian service plan is to program the car to think it is running a 21.

They should just add it to the software to be able to change between the offerings they have in the configuration.

 

[caiudalmau]

Just registered and wanted to report in what I'm looking to do. I just took delivery on 2/4 and really enjoy the truck. I'm actually looking at the Nokian Tyres One HT all season tire. It has a higher load rating than the stock ATs and is the same exact size. Discount Tire is going to call me back on availability, but I'm going to seriously consider these for some more comfort and range.

Did you ever got to test your range with this tire?

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