21" Lug Configuration - why?

[Aardvark]

They are exactly the same. My truck came with 21's, I now have 20's. There no difference.

Perfect. That was my plan also.
Thanks.

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[SACDFJC]

Perfect. That was my plan also.
Thanks.

Just be aware that the 20's are 1" taller vs the 21's and with the latest OTA my speedo is now reading 1 mph slower than I am actually traveling. I have an appointment for reprogramming the truck tire size in October. That should correct the speedo.

 

[Aardvark]

Just be aware that the 20's are 1" taller vs the 21's and with the latest OTA my speedo is now reading 1 mph slower than I am actually traveling. I have an appointment for reprogramming the truck tire size in October. That should correct the speedo.

I don't plan to get the 20" ATs. I'm going to get a set of winter tires on dedicated 20" rims for winter camping and skiing. I'll either find a set with the aspect ratio that gives me the same diameter as the 21s, or just accept the 1 mph difference. for our Model X with 20" tires, we've been using a dedicated set of Blizzak snow tires on 19" rims (TireRack.com) since 2016, and it's worked out very well. It also gives me a chance every year to remove the corrosion and re-lube the brake calipers.
The difficulty with the R1S will be finding the snow tires with the correct load and speed ratings.

 

[COdogman]

When searching for wheels online by bolt pattern, I didn’t feel there were fewer options for the 5x5.5s. What makes it impossible to find Rivian wheels is the insane offset, the weight rating and choosing a design that will fit over the brake caliper.

 

[jakef801]

I don't plan to get the 20" ATs. I'm going to get a set of winter tires on dedicated 20" rims for winter camping and skiing. I'll either find a set with the aspect ratio that gives me the same diameter as the 21s, or just accept the 1 mph difference. for our Model X with 20" tires, we've been using a dedicated set of Blizzak snow tires on 19" rims (TireRack.com) since 2016, and it's worked out very well. It also gives me a chance every year to remove the corrosion and re-lube the brake calipers.
The difficulty with the R1S will be finding the snow tires with the correct load and speed ratings.

Where are you going to get the rims?

 

[Aardvark]

Where are you going to get the rims?

Don't know yet. The large offset required by the Rivian is going make the search a little challenging. But like with Teslas in the early years, TireRack and others stepped up to the plate when the number of Teslas ramped up. I predict the same will happen with Rivian

 

[SACDFJC]

Don't know yet. The large offset required by the Rivian is going make the search a little challenging. But like with Teslas in the early years, TireRack and others stepped up to the plate when the number of Teslas ramped up. I predict the same will happen with Rivian

There were a set of 20's for sale on Facebook marketplace. Not sure if they are still there, but they were there a few days ago. A little pricey at 4k for the set.

 

[jakef801]

^^^ I'd buy them right now. Guess I need to "up" my marketplace search, hourly.

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