Hankook Ion HT 21” tires

[dradam]

thanks for posting this. Hopefully it will become more clear as the numbers increase.

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[VandalSibs]

I love @Rivian Roamer and the insights the data from that platform provides.

However, I am not sure you can draw a conclusion from 10 vehicles. Especially when the efficiency differences are so small between the tires. There are so many variables that impact efficiency, and that number is an average that has no controls over the other variables that impact efficiency.

Here is the data for those who are wondering what we are talking about:

I compared only the 22s because that is the most efficient setup in the Gen2 trucks.

The Gen1 21s show a big difference. This may be what you are referring to:

Why is there such a big difference on the 21" wheels compared to the 22" wheels? I think because there are other variables that have impacted the efficiency of those 10 vehicles that are more significant than the tires. IDK.

Not sure why the Continentals are on there, as there aren't any of that model in that size according to Continental's site...

EDIT: Forgot to mention that I meant the 275/55/R21 size.

 

[Rivian Roamer]

I love @Rivian Roamer and the insights the data from that platform provides.

However, I am not sure you can draw a conclusion from 10 vehicles. Especially when the efficiency differences are so small between the tires. There are so many variables that impact efficiency, and that number is an average that has no controls over the other variables that impact efficiency.

Here is the data for those who are wondering what we are talking about:

I compared only the 22s because that is the most efficient setup in the Gen2 trucks.

The Gen1 21s show a big difference. This may be what you are referring to:

Why is there such a big difference on the 21" wheels compared to the 22" wheels? I think because there are other variables that have impacted the efficiency of those 10 vehicles that are more significant than the tires. IDK.

10 vehicles and 30,000 is definitely not statistically significant. Directional, sure but if those 10 vehicles aren't geographically diverse it may not matter much.

 

[Rivian Roamer]

21" wheels are also Gen 1 only. They were magic, it was the only setup I would routinely hit my rated efficiency on. My Gen 2 almost never does.

 

[CrazyOne]

21" wheels are also Gen 1 only. They were magic, it was the only setup I would routinely hit my rated efficiency on. My Gen 2 almost never does.

Rivian changed how they calculate EPA ratings with G2. WRT range accuracy, they were like BMW with G1, with G2, they are between BMW and Tesla. G2 gets similar range from smaller battery. Some were real improvements, some weren't.

 

[Rivian Roamer]

Rivian changed how they calculate EPA ratings with G2. WRT range accuracy, they were like BMW with G1, with G2, they are between BMW and Tesla. G2 gets similar range from smaller battery. Some were real improvements, some weren't.

I thought the difference was they took a voluntary EPA hit to make it more accurate with Gen 1?

 

[CrazyOne]

I thought the difference was they took a voluntary EPA hit to make it more accurate with Gen 1?

This is by no means complete description, but there is a standard test that everyone does on rolling road. It's never done on real roads. Everyone multiplies this range by a number that they think/claim/want to reflect real range. This is where gaming of the system happens. I don't think anyone is verifying this number. Sometimes, there is a class action lawsuit after a few years. I believe Hyundai, Kia and VW had lawsuits regarding this. For Tesla there was no lawsuit, but there was some pressure from government.

Not all customers do the research. They just go with EPA range, which can be 20-25% different from real numbers. All things being equal, people will buy a EPA 300 mile EV, not EPA 240 mile EV, even if they are the same in real world. Even if Car and Driver or similar outlet claim they are same in real life, it's hard to be believe that it's true in all conditions.

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