I wonder if the confusion is that the testing was done with pre-production "launch" vehicles which for some reason didn't incorporate the heat pump and were like the test mules we saw as opposed to "Launch Edition" saleable units.
that was my understanding
Of course. That’s because no one drives the speed limit.
I’m confused. I thought smaller tires gave you more range, because of rolling resistance.Rivian Uses a 5 Cycle Method (allowed) instead of a 2 Cycle Calculation Method. This gives them higher numbers. (Tesla and Lucid do this as well and is a well documented difference as the Consumer Reports chart highlights.) If this were a BMW or a Chevy etc. the EPA range would be:
I dropped the EPA reports posted by the OP into Gemini and asked it to recalculate based on the 2 cycle testing. Details are attached. (Highway range, fwiw is 288 / 274 using the 2 cycle method.)
- 21 inch wheels 306 miles
- 20 inch wheels 297 miles
IOW it is about the same as an AWD Blazer SS (302 miles) not far from teh Subaru Solterra (288) and about 100 EPA miles less than the iX3 when all of them are calculated using the same methodology.
You can keep your gen2 heat pumps, and your improved efficiencies. The gen1 resistive heater fires up like a charm every time
Totally agree. People are too hung up on range. Sure 350 is better than 250 but for daily driving range is irrelevant. And when you need to drive any significant distance, charge speed, and specifically sustained peak charge speed, is more important than range because you almost never charge to 100% at a DCFC because that will end up increasing your charge time significantly.
Rolling resistance in pneumatic tires mostly depends on the amount of deformation in the contact patch and the amount of slip with applied torque. Pressure matters more than size in that regard. So for a pneumatic tire a narrower width with a higher pressure on the ground for the same load is actually worse. Larger diameter trends towards less rolling resistance however as I understand it for pneumatic tires it doesn't matter a whole lot. I can't find numbers specifically for the Pirelli Scorpion MS but basically every Pirelli tire in the same family (like the Cinturato P7) has a similar rolling resistance within a few percent regardless of size. It's entirely possible for it to wash out to be the same on the R2, or even be worse than the R1.
From what I heard, the wheels are actually the same size. It's the rims that are different sizes. So I believe they are all 32" diameter but the amount of sidewall showing is different.
My understanding is a heat pump is included.
This is where I'm at as well. I'd much rather Rivian work on sustaining peak charge speed further into the curve than having a bigger battery. 210kwh peak is fine if they can find a way to maintain that peak for more than a minute or two.
My guess is that they tested the 20" configuration with the pseudo A/T tires from the performance/launch edition vs. the A/S tires mounted to the 21" wheels at launch.
There is a heat pump included - read thru all the posts in this thread. It's been confirmed that there is one.
That was smart to make it just over 6000
The "EPA range" is already listed in the configurator on the Rivian site if that is what you were asking about, and figures above seem to back up configurator #s, or possibly config. # is conservative (307 miles with 20" AT on performance package). I was happy to see Rivian continuing to be honest and as accurate as possible, unlike Tesla's past practices of over-promising range, delivery dates, and prices.
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