20in wheel worse range even with all season tires?

[rfkxyz]

However, a Rivian Service center rep told me that the 20 in wheel is also a heavier duty and heavier wheel than the 21 in wheel and will get worse range than the 21 in wheel, even if you put an all season on it. They said it was because the 20 in wheel was designed for more rigorous off road situation loading and the 21 in wheel was not.

You’d need the weights of the 2 wheels to answer this question.

But the 20” on the premium trim gets 330, so those are always an option

Well AS tires on AT wheels might only shoot the gap between AS tires & wheels vs. AT tires & wheels. Seems not-unreasonable.

I’m confused by this wording? There’s no such thing as “AT wheels”. Any tire can go on any rim. So yeah put AS tires on the 20” rims no problem. Would be better for range, that’s been discussed at length if that’s what you were referring to

• R2 Premium w/ 20" AS wheels and tires: 330 miles
• R2 Performance w/ 20" AT wheels and tires: 307 miles

So lets say you get Performance AT but replace those 20" tires w/ Premium's 20" AS tires - figure your range will be somewhere 307-330 miles. But if AT wheel is heavier then I doubt you'll actually get to 330 - maybe ~320? Just a wild guess.

My intent is now careening toward Premium 20" for a handful of reasons for when the time comes. But would also look to replace those AS tires w/ AW 3PMSF - I'll take range losses for that and EVS 1.6" lift.

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[tivoboy]

State of charge put it all in this nice table.

 

[rfkxyz]

State of charge put it all in this nice table.

But doesn't speculate about Premium's (or any) 20" AS tires on Performance AT 20" wheels like we're wildly doing here.

 

[ksurfier]

Seems true. Or wait for the Performance which gives you the lighter 20in wheel.

But unfortunately, I would not say that it is even a wide selection for the 20in tire. It is also very limited compared to smaller diameters......but a lot more than the single option for the 21!

FYI - hundreds of fitment options for 20”:

 

[tivoboy]

But doesn't speculate about Premium's (or any) 20" AS tires on Performance AT 20" wheels like we're wildly doing here.

Isn’t that what the 4th line up from the bottom is? Thats premium, LR AWD 20” and I’m ASSUMING AS, not AT as AT are called out as such.

 

[UnsungZero_OldTimeAdMan]

So back to the OP's question, given the properties of the 20" wheel - the service guy is inferring there's not AS rubber out there that will overcome the deficit. Not meaningfully anyway. Which returns a buyer back to the only "significant" reason to buy the 20's is the much wider selection of tires vs the one tire currently for the 21's.

? Look at the options for R2 Premium. Same Pirelli MS AS tire, just for two different sizes of wheels. Same EPA certified max range of 330 mi. Short answer to original question is “depends on which tire is chosen”.

Too many false assumptions in this thread. And the myth and false equivalences are not easy to counter because tire manufacturers do not publish all info: like details on tire construction, weight distribution, and rolling resistance.

 

[rvnxyz001]

BTW , tires for 21in does not have winter tire option

 

[mferring]

FYI - hundreds of fitment options for 20”:

I am talking about the 255/60/20 size that the software is aligned with.

 

[mferring]

Isn’t that what the 4th line up from the bottom is? Thats premium, LR AWD 20” and I’m ASSUMING AS, not AT as AT are called out as such.

The Premium appears to have a different wheel for the 20in size than they launch edition. It might be lighter.

(45) R2 Wheels Options, Tire Sizes, Width, Offset - Hub Bore Size - 19" and 20" | Rivian Forums - R1 R2 R3 R4 News, Specs, Models, RIVN Stock -- Rivianforums.com

 

[mferring]

? Look at the options for R2 Premium. Same Pirelli MS AS tire, just for two different sizes of wheels. Same EPA certified max range of 330 mi. Short answer to original question is “depends on which tire is chosen”.

Too many false assumptions in this thread. And the myth and false equivalences are not easy to counter because tire manufacturers do not publish all info: like details on tire construction, weight distribution, and rolling resistance.

As I mentioned, the 330mi 20 in for the premium uses a different wheel than the Launch Edition. I was surprised too that the wheel seems to have some inertia effects from being a more heavy duty higher weight off road more rugged oriented wheel that affects range. Interesting stuff we have never had to think about much with ICE vehicles.

Having real world highway 70+ mph range best case in the lower to mid 200's for the R2 is still tough for me to swallow (assuming 20-80,90% battery usage) when even my little BRZ with a 13g tank can go well into the 300's going 70-75 mph. And my wife's Outback with the 19g tank routinely shows almost 600 mi of range.

But I still want one..... Just trying to optimize.....

 

[NY_Rob]

The AT tires they put on the 20" rims have higher rolling resistance then the on-road tires they put on the 21" rims. If they could put the same tire on the 20" and the 21" wheel (assuming there's not a big weight difference between the two) the 20" might get slightly more range.

The 20" wheels are made for occasional off-road use so they are a more husky build and therefore heavier than the light duty/street-use 21" wheels. Couple increased weight with the higher rolling resistance of the 20" AT tires and in this case you have the larger wheel size producing more range than the smaller wheel size.

If you can live with the very minor difference in range, go with the 20"s.. your future self will thank you!

 

[macb00kemdanno]

Too much math in this thread for me. I’ll keep it simple. Given that all the other wheels/tires get 330 miles, I’ll just spitball that the 20” A/T wheels with A/S tires will get somewhere in between. I’ll just say 320 miles and go on with life because three pages of this is nauseating

 

[cwq93r]

State of charge put it all in this nice table.

Tom also mentioned that the unreleased trims have not been EPA certified yet. They are Rivian estimates. Until they actually get certified, we don’t know the true range for these.

 

[R1T Preds Fan]

Like the 20” on the R1 series that is forged, the 20” on the R2 is a more robust stronger wheel for more off road capability leading to a heavier design. As far as I can tell Rivian hasn’t announced it a as a forged design but that is the main difference in range along with slightly worse aero if comparing with an AS tire to the 21” AS… On the video linked in this thread the design engineer stated it would not surpass the 21” range on the 20” with an AS tire installed but it would be a very minimal gap.
So 3-7 mile range hit (aprox) on the 20” with AS is much more manageable over ownership. The biggest difference being the significantly cheaper tire options on the 20’s along with way more selection puts them as the better choice after the first to second tire change; you will have reached the savings break point difference over the 21”. Same on my T it was significantly cheaper for me to buy a set of 20’s from another owner than pay $2,500 for the stock Pirreli replacement 21” tires as they were the only option for the first 2.5 years of ownership. Now there are a few more choices but they are still more expensive than the set of 20” Michelin’s I just installed a while back…

 

[ksurfier]

But doesn't speculate about Premium's (or any) 20" AS tires on Performance AT 20" wheels like we're wildly doing here.

Speculations? Nope
Maths/science? You betcha!

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