? Official EPA Range and MPGe Numbers for R1T & R1S

[wicked2112]

dude. It's a truck. It's like twice the size of a tesla.

So how's that Tesla CyberTruck coming along???? ??
Oh wait, they haven't started producing not a one!! Good luck!! ???

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[DuckTruck]

I agree with regard to the wheels. But IMO, resistance itself, likely not largest contributor to lower range when comparing the Rivian 20" vs 21" tire/wheel systems.

It's possible that there is a significant difference in the weight of the two sets of wheels by themselves with the smaller wheel weighing more. This seems unlikely to me with Rivians attention to detail.

But it is almost a certainty that the all-terrain (AT) tires weigh significantly more than street tires (less rubber and sidewall). One of the major advantages of the smaller wheels is to be able to have more sidewall. This allows air pressure to be reduced for additional traction when off road. Hence at least one reason for the on-board air-compressor.

Of course, AT tires also have more tread above the sidewall. In both cases, more rubber translates to more weight and that translates to more power under acceleration/deceleration. And yes the additional rubber, being more "squishy" has additional rolling resistance.

Another potential contributing factor comes to mind - circumference of the tire/wheel combo. The Rivian configurator appears to confirm that the smaller wheels are paired with taller sidewall tire. I don't believe it is known at this point that the 20" combo is either taller or shorter than the 21" combo. The 20 inch "appears" in the configurator to be taller, but this might be a illusion.

Depending on the exact spec of the tire, the all-terrain could either be slightly smaller (most likely) to save weight and energy, the same, or even taller in circumference (less likely) as the 21" tire.

Food for thought and speculation. We'll have facts "soon".

Ralph,

While the height of the combos may be similar, I agree that'll be interesting to get the weight of each of the three combinations. To me, the A/T's appeared to have a more road-tire type of contact patch than many of the aggressive A/T's I see and hear regularly. When I witness some of the gas and diesel rigs around home with A/T's, I can hear the whine of the tires above the noise of their louder-than-normal engines. This is especially true during turns in the intersection in front of my house, and just 150 feet away, rounding a turn in front of my neighbor's place.

Comparatively, even with the quiet running of the Rivian, I didn't notice that whine and thrum that you normally hear, especially when taking corners hard or witnessing others do the same. I can't speak to the A/T's rubber compound, but I'm assuming it is somewhat soft because of the grip we had. That was true both during really severe acceleration, as well as when cornering hard. I'm guessing they have better rolling resistance than your standard, or very aggressive A/T tires, but of course they'd be nowhere near the efficiency of the lower rolling resistance (and harder/more highly-inflated?) All Seasons on the 21's.

As to the question that was raised about aero inserts, I'm pretty certain the 21's are the only ones where that is an option. I'm relatively certain I heard that the 20's and 22's will not have them. I hope someone else can weigh-in on that, because I'm going from memory.

 

[DuckTruck]

Someone correct me if I was imagining this, but wasn't there 20" All-Terrain wheel with aero covers? I think I saw it in photo somewhere. Any idea if that would improve range (even if slightly) on the 20" wheels?

Regardless, I will stick with the 20" wheels just for easier replacement of tires down the line. From what I've been reading, that 21" being unique could cause a real headache depending on the situation.

If there are inserts out there for the 20's, I hope someone can show those pictures. Again, I seem to recall the 21" wheels will be the only ones with aero inserts available.

To your other point, I think you're right that the 20" wheels will make it much easier to find a variety of replacement options.

I have to believe that all 3 sets of tires will have fairly high Load Ratings, given the combination of the weight of these vehicles and their performance capabilities. Even my lighter and shorter height XC60 comes with a warning from Volvo to make certain the Load Rating of any tire is 105 or greater. The height alone of the Rivians will likely dictate a higher Load Rating, given the stress that a taller vehicle imposes, or loads on a tire when cornering hard.

 

[DuckTruck]

Would the ATs provide a significant upgrade for hazardous weather? I have no intention of driving in dunes, rock crawling, etc. (though maybe some mountainous dirt trails like you'd find with logging roads), but I am in New England where weather can get crazy so I've been planning to get the ATs.

From the article included above by @electruck (here it is again: https://www.pirelli.com/global/en-ww/road/pirelli-tires-tailor-made-for-rivian), the narrative for the A/T's makes them sound like they may be the best choice for Winter weather. Specifically, it states:

"The Scorpion All Terrain Plus is designed with a focus on optimizing durability, traction and wear resistance, in addition to providing snow traction: it gained indeed the three-peak mountain snowflake (3PMSF) symbol"

Of the All Season's, it says they are designed for "light snow" but make no mention of a rating or symbol on the sidewall. I'd be pretty certain that either would be better than the 22's in Winter weather.

 

[eggpaul]

Replacing 21s is going to be an awful experience. I would stick with 20s. If you don't like the range. When they are worn out, find something with less aggressive tread.

How so?

 

[DuckTruck]

With an average of 300 inches of snow a year I'll keep the 20 ATs

I'm pretty certain that 300 inches a year would be considered "light snow" only by the hardiest of Alaskans, which from my recent visit means pretty much all Alaskans. The only snowflakes I saw there were honest-to-God Flakes of Snow. And that was in August!

I can't imagine rolling around your beautiful State on anything but the A/T's. I also can't wait for the chance to visit again, this time in a Rivian, once your charging network is in place, and once I can afford the cost of taking the Ferry to Whittier.

I don't want to be branded a "Snowflake" for taking the easy route there, but "Wimp" I could live with. ?

 

[SeaGeo]

Would the ATs provide a significant upgrade for hazardous weather? I have no intention of driving in dunes, rock crawling, etc. (though maybe some mountainous dirt trails like you'd find with logging roads), but I am in New England where weather can get crazy so I've been planning to get the ATs.

Yeah, the 20s have better snow rating (which isn't just because they are ATs).
https://www.pirelli.com/global/en-ww/road/pirelli-tires-tailor-made-for-rivian

 

[bajadahl]

How so?

Are you asking how replacing 21s is going to be an awful experience? I think the general consensus from most who have been following Rivian for a while is that the 21s are an odd size that won't be in stock at your local retailer like Discount Tire... (and may never be kept in stock unless other manufacturers start to adopt that size) If on a road trip and you have a tire problem it's going to be much easier getting a 20 replacement, where as you might be stuck for days waiting on a 21...

With a full size spare on the R1T this won't be as critical but with the space saver on the R1S it could end up being a really big deal.

Now if you are just going in for a regular replacement and have time to place an order with your tire shop of choice then it probably won't be a big deal. But (at least for the time being) going in and getting 21s on the same day is almost certainly not going to happen.

 

[R1TFTW]

I just want to get my truck… range is the least of my concern at this point.

 

[MattpR1T]

Would the ATs provide a significant upgrade for hazardous weather? I have no intention of driving in dunes, rock crawling, etc. (though maybe some mountainous dirt trails like you'd find with logging roads), but I am in New England where weather can get crazy so I've been planning to get the ATs.

Yes and No. The 20’s have a more aggressive tread and they have more rubber between the rim and the road surface. This means better traction and more impact resistance against potholes and other road encumbrances. If it’s specifically snow and or rain you can get a Mountain / Snow tread on the 22’s as well as the 20’s.

 

[Rousie13]

I’m curious, like everyone else, to see if those numbers are what you can actually get and what people are actually getting with different configurations. Like a lot of people, the given numbers will be great for 95% of my driving and it’s just the road trips that it could have an impact. If the charging curves are good and the charging network is great, then it becomes a non issue.

 

[elas9000]

Given the "designed for Rivian" uniqueness of all the tire selections, especially the 21's, I expect Rivian will keep an ample supply of tires in stock at their service centers.

 

[SeaGeo]

Yes and No. The 20’s have a more aggressive tread and they have more rubber between the rim and the road surface. This means better traction and more impact resistance against potholes and other road encumbrances. If it’s specifically snow and or rain you can get a Mountain / Snow tread on the 22’s as well as the 20’s.

To point out the obvious (to me) you're talking about new tires. I suspect @PastyPilgrim is talking about the factory rim+tire combo. The stock 22s aren't snow rated, so you would want to get a winter tire for the 22s if someone goes that route and lives in a snowy or cold environment.

 

[SeaGeo]

Given the "designed for Rivian" uniqueness of all the tire selections, especially the 21's, I expect Rivian will keep an ample supply of tires in stock at their service centers.

hopefully you're close to a service center when you blow a tire.

Which is probably a discussion for another thread, but assuming you get a spare either way, Rivian I'd hope Rivian could get you a new set of 21s at the service center or very quickly with their mobile service. And as long as they can get a tow truck to you and have their insurance, their roadside should take care of getting you to a location with one. So maybe that 10% hit in range ends up being less valuable to people than the perceived difficulty in finding the tires for the 21 inch rims.

 

[Vern Bybee]

Since I want to keep my 20s, looks like I'll have to do an stop on a 250 mile run, does anyone know if I can use the restroom of a Sam's club, or I need a membership to get in ?

I had a Sam's Club membership like 20 years ago still use that card to get in. Ha Ha
If nothing else just ask someone to walk you in I'm sure someone will

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