Sponsored

20” AT vs 21” standard tires.

sub

Well-Known Member
Joined
Jul 23, 2021
Threads
34
Messages
1,873
Reaction score
3,306
Location
USA
Vehicles
Rivian R1S, Tesla Model 3
As for getting the 21's and putting on 20's for the winter/spring, that sounds great. Sadly my garage is barely room for this truck. Part of the reason I'm not getting the Lightning as it's too long for my garage.
Where I live, a cold miserable place where no one would 2nd guess the need for winter tires, all of the tire shops will store your summer/winter tires for you during the off season(for a fee). If you don't live in an area where many people have seasonal tires, the shops may not offer that service. But it is worth asking if that is the only thing holding you back.
Sponsored

 

Rivian_Hugh_III

Well-Known Member
Joined
Oct 4, 2021
Threads
68
Messages
890
Reaction score
1,427
Location
Midwest
Vehicles
2008 Infiniti EX35
Ha. Way to jump to conclusions but You couldn’t be more wrong. I lived in Ohio and Boulder Colorado for decades before moving here for work.

I have years of off road experience in all kinds of 4x4s including still going out in my 1975 FJ55 - 4 speed, no power steering, no lift kit, etc. If you want to experience real back country preparedness, go for adventure in an almost 50 year old truck. Carrying the right tools, belts, hoses and knowledge are the key to getting back home.

If you think just adding basic AT tires are suddenly going to make you an off-road rock star in your Rivian you are not well prepared.
Hoses?
 

ironpig

Well-Known Member
Joined
Nov 19, 2021
Threads
7
Messages
2,105
Reaction score
3,557
Location
Los Angeles, CA
Vehicles
2022 R1T LE, 2015 4Runner, 1975 FJ55 Land Cruiser
Not meaning to start a fight....which is so hard to do on the internet :)

I think we all are different and have different desires and needs.

I was born and raised till 10 in Santa Monica, but I learned to drive in Pennsylvania. Lots of snow, and crappy roads. I'm not worried about my driving in snow (but damn the people here are bad at it.)

I live at 5500 feet, my shabins at 8000 feet, but this is Albuquerque, NM, so not a bunch of snow and it melts by noon most times thanks to our elevation and bright sun. The "Shabin" is in the Jemez mountains on the rim of a supervolcano (Valles Caldera), and that gets a lot more snow than Burque, but I'm only up there a few weekends when it snows. Hell, I was up there the other day in my Chevy Bolt and skinny tires.

But I do think the 20's fit the framing of the car better, and there will be times I am semi off roading. I don't think I "need" winter tires for the few times I'm hitting the snow. But I could be wrong.

Truthfully the 21" would be fine. I just don't love the look and the ATs would be better the few times I'm hitting the snow (truthfully the mud is much worse than the snow. The mud gets deep during spring thaw, and there are places where the road turns to pure clay that are slippery as snot sliding of an armadillos back.

As for getting the 21's and putting on 20's for the winter/spring, that sounds great. Sadly my garage is barely room for this truck. Part of the reason I'm not getting the Lightning as it's too long for my garage.

Could keep the truck outside, but Albuquerque sun is killer on paint, and while we don't get a bunch of rain, when we do have summer monsoons, they often have hail.
IMG_5244.jpg

download.jpg

4F6C51CB-80EE-4C8B-B229-93B77C4FC0B6.jpg


Think Rivian can convert this truck to an EV?
There are lots of great reasons to get the 20s with the AT tires. And aesthetics is certainly one of them. They do look great.

There also seems to be a lot of overlapping conversations about All Terrain tires vrs All Season tires vrs Winter/Snow tires.

I just think there seems to be a lot of people here who are getting their first SUV/TRUCK etc and have plans to use it for some adventure activities - but they are really concerned about range.

All Terrain tires are great, but as you rightly post - you can drive and explore all kinds of places and conditions on All Season tires as well. I'm just trying to kill this growing narrative that if you don't have AT tires on your truck you're going to end up in a ditch or you won't be able to explore trails or something.

Most highly Capable SUVs and trucks - Toyota Land Cruiser, Land Rover Defender, Etc - are delivered to customers and reviewed by journalists on All Season tires.
 

EarlyAdptr

Well-Known Member
First Name
Scott
Joined
Feb 17, 2021
Threads
17
Messages
429
Reaction score
579
Location
Seattle
Vehicles
Toyota Sequoia
Occupation
Consultant
There are lots of great reasons to get the 20s with the AT tires. And aesthetics is certainly one of them. They do look great.

There also seems to be a lot of overlapping conversations about All Terrain tires vrs All Season tires vrs Winter/Snow tires.

I just think there seems to be a lot of people here who are getting their first SUV/TRUCK etc and have plans to use it for some adventure activities - but they are really concerned about range.

All Terrain tires are great, but as you rightly post - you can drive and explore all kinds of places and conditions on All Season tires as well. I'm just trying to kill this growing narrative that if you don't have AT tires on your truck you're going to end up in a ditch or you won't be able to explore trails or something.

Most highly Capable SUVs and trucks - Toyota Land Cruiser, Land Rover Defender, Etc - are delivered to customers and reviewed by journalists on All Season tires.
This describes me pretty well. Although the thing that's really leaning me towards the 20" tires is the fact that the 21" are such an odd (and expensive to replace) tire. If the A/S standard tires with the best range were a more normal (e.g., easily replacable) tire, I'd go with those. But my understanding is because of the vehicle weight, EV's burn through tires. So I'm going with the 20" AT's.
 

ironpig

Well-Known Member
Joined
Nov 19, 2021
Threads
7
Messages
2,105
Reaction score
3,557
Location
Los Angeles, CA
Vehicles
2022 R1T LE, 2015 4Runner, 1975 FJ55 Land Cruiser
This describes me pretty well. Although the thing that's really leaning me towards the 20" tires is the fact that the 21" are such an odd (and expensive to replace) tire. If the A/S standard tires with the best range were a more normal (e.g., easily replacable) tire, I'd go with those. But my understanding is because of the vehicle weight, EV's burn through tires. So I'm going with the 20" AT's.
Makes sense. I agree a 20 inch wheel is preferred.

My Model S burns through rear tires. I do think that the Rivian will as well. It’s a very heavy truck with tons of torque. But it’s also unique in its 4 individual motor layout compared to my rwd Tesla with one motor. Maybe the R1T will wear tires more evenly. But I expect tire cost and more frequent replacement will be a feature of the Rivian.
 

Sponsored

SANZC02

Well-Known Member
First Name
Bob
Joined
Feb 11, 2021
Threads
50
Messages
7,412
Reaction score
12,703
Location
California
Vehicles
Tesla Model S, LE - R1S
Occupation
Retired
Makes sense. I agree a 20 inch wheel is preferred.

My Model S burns through rear tires. I do think that the Rivian will as well. It’s a very heavy truck with tons of torque. But it’s also unique in its 4 individual motor layout compared to my rwd Tesla with one motor. Maybe the R1T will wear tires more evenly. But I expect tire cost and more frequent replacement will be a feature of the Rivian.
I tend to agree. My Model S chews through tires as well only getting about 30k out of a set. I’m on my 3rd set now.

I’m guessing the Rivian may be worse unless I can control the spirited driving.
 

Cosmacelf

Well-Known Member
Joined
Nov 11, 2020
Threads
20
Messages
442
Reaction score
530
Location
San Diego, CA
Vehicles
Rivian R1S, Tesla Model X
Occupation
Software
Does anyone know what the specs are with the Rivian supplied AT 20” tire? Does it have an M+S stamp on it?
 

Siva

Active Member
First Name
Siva
Joined
Apr 12, 2022
Threads
0
Messages
41
Reaction score
46
Location
Ohio
Vehicles
2023 R1S, 2013 Leaf S and 2006 Pilot EX-L
I was debating 20 vs 21. Most of my driving would be on paved roads and do not want to compromise on fuel efficiency. This thing is already one of the worst in efficiency, don't want to burn more with 20 wheels and all terrain tires. I have never done off-roading before but would want to be little bit adventurous with my R1S. That's why I was even considering 20s. Now after watching this, assuming what Sandy has on his truck are 21 road tires, I think I won't have any problem beginning my off road adventure with 21s. Two more decisions to make 1) Black Mountain or Ocean Coast interior and 2) Compact spare or not.

Here is Sandy Munro's off-road test on what looks like 21 road tires.
 

AllInev

Well-Known Member
Joined
Nov 22, 2021
Threads
37
Messages
1,265
Reaction score
2,111
Location
Oakland, CA
Vehicles
Prius V, 2022 R1T
Clubs
 
Why get tires for the 5% situation when there is a tire that suits your 95% situation?
Agree. I'm choosing the 21" wheels. Lots of people here saying they don't mind the 15% range reduction. For me it's not the range reduction of any given charge, it's the overall range for the lifetime of the truck. 15% of 150,000 miles is 22,500 miles. That's a lot of miles and wasted kWhs.
 

Sponsored

AllInev

Well-Known Member
Joined
Nov 22, 2021
Threads
37
Messages
1,265
Reaction score
2,111
Location
Oakland, CA
Vehicles
Prius V, 2022 R1T
Clubs
 
Fair enough, I'm not questioning your off-road experience and obviously no tire is going to make up for poor driving skill. My point was that making a tire choice for 95% of the time can get someone in a lot of trouble.
It certainly would make it easier for those living with snow to pick the 21" wheels if there were snow tire options for them. I assume most of you living with snow change tires depending on the season, right? Surely you don't drive with snow tires all year?
 

sevengroove

Well-Known Member
Joined
Jul 27, 2020
Threads
26
Messages
1,335
Reaction score
2,853
Location
Seattle, WA
Vehicles
R1S Launch Edition
Agree. I'm choosing the 21" wheels. Lots of people here saying they don't mind the 15% range reduction. For me it's not the range reduction of any given charge, it's the overall range for the lifetime of the truck. 15% of 150,000 miles is 22,500 miles. That's a lot of miles and wasted kWhs.
I agree with you, but I'm still going with the 20s to start with for a couple of reasons:
  • it's a forged wheel, which is a nice value-add that comes included with LEs
  • psychologically I think ATs will give me the "encouragement" I need to do off-roading as a beginner (debatable, I am aware :D)
  • if I find that I am truly only needing AT tires for 5% of the time, then I can swap them out to all seasons when they wear out, well before the 150k mile vehicle lifetime mark
 

ironpig

Well-Known Member
Joined
Nov 19, 2021
Threads
7
Messages
2,105
Reaction score
3,557
Location
Los Angeles, CA
Vehicles
2022 R1T LE, 2015 4Runner, 1975 FJ55 Land Cruiser
Agree. I'm choosing the 21" wheels. Lots of people here saying they don't mind the 15% range reduction. For me it's not the range reduction of any given charge, it's the overall range for the lifetime of the truck. 15% of 150,000 miles is 22,500 miles. That's a lot of miles and wasted kWhs.
Right. "Range reduction" doesn't land the same as "increased energy usage" or "added inefficiency". People sometimes get mad here when you point out that the Rivian is still a very energy inefficient vehicle and the AT tires make it significantly worse.

But it's a truck and a lot of people really need the ATs for their climate and or activities. It's an adventure vehicle so adventure tires make sense. I'm somewhere in the middle. For what I plan to do with the truck I could maybe get away with the 21s, but it doesn't matter because the only trucks my guide was able to match me with have 20ATs anyway.
 

jollyroger

Well-Known Member
First Name
Jeffrey
Joined
Apr 8, 2022
Threads
20
Messages
482
Reaction score
570
Location
California
Vehicles
Tesla model 3, R1T
Occupation
IT Manager
For the lifetime argument I'm thinking that a low rolling resistance 275/60/R20 might wind up being more efficient than even the 21" if you replace them after the original AT's get used up. Depending on how long you own the truck you might come out ahead in the long run.
 

mini2nut

Well-Known Member
Joined
Feb 4, 2022
Threads
47
Messages
1,679
Reaction score
2,003
Location
SoCal
Vehicles
Rivian R1T, Model Y
I’m sticking with 20’s. Why? Forged, forged, forged. All of the other Rivian R1T wheel options are weaker cast aluminum.

“A forged wheel is manufactured from a billet, or a large square piece of solid metal. The billet is heated to extreme temperatures and pressurized to take its shape. This thermal cycle process causes forged wheels to be stronger than cast wheels due to grain refinement. Consistent forging makes for stronger structural integrity with less material compared to a cast wheel, however the process costs more, rendering forged wheels the more expensive option.

Forged wheels offer several advantages. The manufacturing process results in a stronger wheel by eliminating cavities, porosity, and shrinkage. Due to its tighter grain structure, forged wheels are also mechanically stronger, ensuring better wear resistance over time. You also get better performance and handling because of this process.

The cast wheel manufacturing process involves heating up aluminum until it reaches a molten state. The molten aluminum is then poured into a mold where it is cast into its final shape with the help of a vacuum. After the cast cools down, it is trimmed and drilled to perfection. The casting process is quick and inexpensive but has the disadvantage of rendering a weaker material than a forged wheel.”

https://www.vividwheels.com/manufacturing/
Sponsored

 
Last edited:
 








Top