Range Test - Group Test Idea

[140 degrees]

Any owner group or club up for a simple test? The recent 70 mph range test by Alex on Autos has me thinking. He tested on the 21 inch wheels and got 338 miles. Other tests I have seen on the 20 inch wheels have been well under 300 miles. Was this due to the wheels, the fact he ran in conserve mode, or something else?

Wouldn't it be interesting if 3 owners, each with one of the wheel options, did a comparison? It wouldn't have to be a full range test. Fully charge 3 trucks. Set driving mode the same. Same tire pressure, same everything. Then caravan around for 100 miles or so, and record/report the final state of charge. That would be enough to see the percentage difference that the wheel size makes. It would eliminate variation due to elevation changes, headwinds, temperature, etc. For extra credit, you could add a fourth truck with an open tonneau cover.

Interested?

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[emoore]

Kyle for Out of Spec got 298 miles on 20" AT in conserve at 70 mph (GPS speed, 73 indicated on truck)

 

[140 degrees]

Thanks for your reply! I noticed that Tom Moloughney, who is also a good reviewer, got 254 miles. I think everything was the same but wind and temperature. Tom says he is going to rerun the test under more favorable conditions.

My concern is that the range test results vary for all kinds of reasons. A caravan test would allow you to control all of the environmental variation. I had pretty much decided on the 20" ATs, but I'd like to know how much range I'm really giving up. If it is a consistent 40 mile difference or more, that might change my mind.

 

[DJG]

Great news, this has already been done. Some company called Rivian ran hundreds of tests with each wheel configuration in all types of conditions. They published their findings on their website.

 

[R1Sky Business]

Great news, this has already been done. Some company called Rivian ran hundreds of tests with each wheel configuration in all types of conditions. They published their findings on their website.

Sounds like Vaporware.....

 

[DJG]

Thanks for your reply! I noticed that Tom Moloughney, who is also a good reviewer, got 254 miles. I think everything was the same but wind and temperature. Tom says he is going to rerun the test under more favorable conditions.

My concern is that the range test results vary for all kinds of reasons. A caravan test would allow you to control all of the environmental variation. I had pretty much decided on the 20" ATs, but I'd like to know how much range I'm really giving up. If it is a consistent 40 mile difference or more, that might change my mind.

All of the conditional variables affect all of the wheel choices the same, so yes, you will always see a ~40 mi hit to range in the 20's vs. the 21's (all else equal). However, personally I don't think the range difference is what's important. What's important is whether the range with 20's is enough or not. For most people most of the time, 40 mi of extra range doesn't change anything to a material degree. However, there can be unique use case circumstances where 40 miles is everything.

 

[ironpig]

Any owner group or club up for a simple test? The recent 70 mph range test by Alex on Autos has me thinking. He tested on the 21 inch wheels and got 338 miles. Other tests I have seen on the 20 inch wheels have been well under 300 miles. Was this due to the wheels, the fact he ran in conserve mode, or something else?

Wouldn't it be interesting if 3 owners, each with one of the wheel options, did a comparison? It wouldn't have to be a full range test. Fully charge 3 trucks. Set driving mode the same. Same tire pressure, same everything. Then caravan around for 100 miles or so, and record/report the final state of charge. That would be enough to see the percentage difference that the wheel size makes. It would eliminate variation due to elevation changes, headwinds, temperature, etc. For extra credit, you could add a fourth truck with an open tonneau cover.

Interested?

Which wheels are on your truck?

 

[140 degrees]

Currently, I've configured the 20ATs, but my truck hasn't been built. I live in the Sierra Nevada foothills, so there is a huge area with limited charger availability nearby. I'm trying to decide if an extra 30-40 miles of range is enough to matter for my use.

I also proposed the test because I thought it would be fun. If I had a truck, it is something I'd like to try if I could find some other like minded Rivian owners with the different wheel/tire options.

I know that Rivian has estimated wheel option range reduction listed on their website. What can I say, I'm a geek. I'd like to see more testing. Rivian says to expect a 10-15% reduction, but the Alex on Autos test result hints that there might be more reduction.

 

[EzMev]

I also would like to see more tests, but mostly with 22's...we have a pretty good idea about the 21's and 20's

20's less than 300 miles conserve mode in good conditions, mostly flat freeways
21's ~330 conserve mode in good conditions, mostly flat freeways

In Auburn I would think AT's as you are close to snow country, off-roading, etc. But if you road trip a lot in the sierra's, maybe range is an issue...I am having the same debate but I live in the city, so leaning away from AT's...

Currently, I've configured the 20ATs, but my truck hasn't been built. I live in the Sierra Nevada foothills, so there is a huge area with limited charger availability nearby. I'm trying to decide if an extra 30-40 miles of range is enough to matter for my use.

I also proposed the test because I thought it would be fun. If I had a truck, it is something I'd like to try if I could find some other like minded Rivian owners with the different wheel/tire options.

I know that Rivian has estimated wheel option range reduction listed on their website. What can I say, I'm a geek. I'd like to see more testing. Rivian says to expect a 10-15% reduction, but the Alex on Autos test result hints that there might be more reduction.

 

[140 degrees]

Thanks for your reply. I think you have a good take on the 20's vs 21's.

 

[ironpig]

Currently, I've configured the 20ATs, but my truck hasn't been built. I live in the Sierra Nevada foothills, so there is a huge area with limited charger availability nearby. I'm trying to decide if an extra 30-40 miles of range is enough to matter for my use.

I also proposed the test because I thought it would be fun. If I had a truck, it is something I'd like to try if I could find some other like minded Rivian owners with the different wheel/tire options.

I know that Rivian has estimated wheel option range reduction listed on their website. What can I say, I'm a geek. I'd like to see more testing. Rivian says to expect a 10-15% reduction, but the Alex on Autos test result hints that there might be more reduction.

It's a little odd to propose other people go out and do range testing for you, but who knows.

There are a ton of threads about range and plenty of articles if you search for them. I can report my truck has gotten basically the advertised range so far. Base your calculations on Rivian's numbers and you will be fine.

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