Tire Sizes

crashmtb

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Looks like LT is out and passenger vehicle is in. This definitely explains why on-road performance is sporty and responsive. I'm sure they did this for ride quality and noise as well. Not a bad option, but for those going off-road (rocks) you will want LT tires or you have a much higher likelihood of having a blowout, as we saw in the reviews.
from the wording in the pirelli information, it sounds like they’ve used LT compounds(more resistant to stone chips etc). on a pmetric carcass.

The primary difference with LT tires is load rating. You can carry more weight at higher pressures.
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koersontap

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I suspect weight was the biggest factor. There's a range/weight penalty jumping to a real, LT, all-terrain tire. I'm a little surprised by the quoted 10%-15% loss from their street 21's to their AT 20s. Having upgraded tires in the past on ICE vehicles, I've found I lose about 3% going to a 10-15lb heavier tire, and about 5% going to an inch taller+heavier tire. I've lost a full 10% by increasing tire weight 20+lbs and gaining 3" in diameter though, but we're only talking an inch difference in tire height and 10lbs of weight with the R1x.
Some of that difference has to be tread pattern, too. When you upgraded, did you upgrade to a similar style tread? That would explain the bigger difference going from the 21" low rolling resistance road tires to the AT's.
 

Speedrye

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Some of that difference has to be tread pattern, too. When you upgraded, did you upgrade to a similar style tread? That would explain the bigger difference going from the 21" low rolling resistance road tires to the AT's.
Each increase above is to a more aggressive tread pattern. From highway tires to all-terrain, or all-terrain to mud tires. You do bring up a good point about the LRR tires though and I don't have enough experience with those to say how much of a difference they make.
 

crashmtb

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Worth noting the pirelli scorpion is available in metric and LT depending on size. Tread pattern is the same.
 

R1T7777

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I haven't seen this posted before. I currently have the R1T configured w/ the 20" rims. I believe they will come with 275/65 R20 tires.
I will be using my truck primarily on road, in snow in winter, etc. no real off-roading, etc.
If I choose to replace the tires for daily driving, do I need to replace with 275/65/20 tires, or are other sizes appropriate? If so which sizes?

Thanks!
If you're doing mostly highway, get the 21" wheels. Saves you $ you can use to get whatever off road wheels and tires you want, and the 21" are the most efficient.
 

BoltEVowner

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If you're doing mostly highway, get the 21" wheels. Saves you $ you can use to get whatever off road wheels and tires you want, and the 21" are the most efficient.
I also want the 20 inch rims and AT tires, and that is what I have configured as well. As a LE preholder, the 20"AT tires are a free upgrade. I am simply going to purchase some 20" AS road tires if the range on the AT tires is insufficient for my needs. I looked at Pirelli Scorpion Verde All Season Plus II | 275/60R20 (tirerack.com) as an option. I am not sure I want both 20" rims and 21" rims just to have AT and road tires. Wish Rivian had a 20" AS option, but they do not...
 

Joel

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I wonder how long before you will be able to order rims and tires.
 
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