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OEM 20” wheels and tires are now available on Rivian’s website for $4100 for a set. Ordered mine today!
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Let’s talk “nuts” for a moment… what style/spec lugs are used? Anyone considering going titanium? I got a set of AcerRacing lugs for my Plaid, but don’t know what is used on the 20” forged wheels. Anyone?
 

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Thanks for the info . Now we know the bolt pattern , and we will need the center bore and the thread pitch of the studs .
And the studs , common threads are M14x1.5, M12x1.5 , M12x1.25 , could you verify ?
 

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So the tire manufacture says the tires are 48lbs you weighed the rim at ~36lbs and the wheel and tire weighed 88. even with the valve stem and wheel weights the tire must weigh almost 3 lbs more than they are claiming. right?
 
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So the tire manufacture says the tires are 48lbs you weighed the rim at ~36lbs and the wheel and tire weighed 88. even with the valve stem and wheel weights the tire must weigh almost 3 lbs more than they are claiming. right?
Im putting Cooper Tires on tomorrow and will weigh the OEM tires and report back.
 

zymolysis

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So the tire manufacture says the tires are 48lbs you weighed the rim at ~36lbs and the wheel and tire weighed 88. even with the valve stem and wheel weights the tire must weigh almost 3 lbs more than they are claiming. right?
I don't know how much, but compressed air will add to the weight (if weighed after it has been aired up).
 

zymolysis

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So the tire manufacture says the tires are 48lbs you weighed the rim at ~36lbs and the wheel and tire weighed 88. even with the valve stem and wheel weights the tire must weigh almost 3 lbs more than they are claiming. right?
There is also the weight of the TPMS sensor, to factor in.
 

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godfodder0901

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That's not true:
Screenshot_20221105_115504.jpg


@zymolysis, all 20" factory options are forged.
Pretty sure the 'bright' wheel is flow formed, not fully forged. Haven't seen one for a while, the early one we saw was not fully forged.

Screenshot 2022-11-30 at 4.29.01 PM.png
 

godfodder0901

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Pretty sure the 'bright' wheel is flow formed, not fully forged. Haven't seen one for a while, the early one we saw was not fully forged.

Screenshot 2022-11-30 at 4.29.01 PM.png
Maybe. I don't have the Brights, and I'm no engineer. Just going off the word of the manufacturer that clearly states they are forged.
 

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Maybe. I don't have the Brights, and I'm no engineer. Just going off the word of the manufacturer that clearly states they are forged.
Yes, makes sense. I recall Tesla call(ed) their wheels 'forged' too....and they are not fully forged. Once we get one off a current car, will share updates!
 
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Mark_AZR1T

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Im putting Cooper Tires on tomorrow and will weigh the OEM tires and report back.
The Cooper AT3's in OEM 20 sizes are 11lbs more each!! However, they have a much higher tire operating pressure range than the Scorpions. Scorpions 50PSI and the Coopers can be run up to 80PSI.

I did two runs on my 55 mile freeway test track (some grades and flats) and found that I can gain back my lost range on the Coopers by running them at 65psi, which is where I have been at for two-months. Far more durable tire over OEM. More to come...
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