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Like many I initially hesitated to option the AT Dark wheels thinking the $3500 was not a good value and I could get some other options post delivery. I've now reconsidered for a number of reasons and will forsure go OEM. My thoughts are below

Pros for the Rivian wheels - I (personally) prefer the look of OEM, they will be more valuable for future resale, perfect fitment, they are actually forged (stronger/lighter) and specifically tuned for the vehicle not only in driving dynamics but programed range calculations, I can roll the cost into my vehicle financing

Pros for Aftermarket wheels - Assuming I've selected the standard 21" option I would now have two sets of wheels therefore getting the best of both worlds with a quick swap (range/off roading capability), my vehicle looks unique compared to other Rivans

Did some window shopping on Discount Tire for some Aftermarket Off Road wheel and tire options for the R1T and found a set that looked the best to me but would cost almost the exact same imagine that (assuming I configured the correct geometry, price shouldn't change much with offset)

I'd love to hear if anyone else is planning to go aftermarket?


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15 MS 70D, Chevy Bolt, Yamaha T700
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I think I'm going to stick with the 20" ATs. The 20" ATs are getting really good reviews, I think the question will be how well they hold up. If they wear too quickly on road, I will probably look for an aftermarket road tire and second set of rims. Since I'm a late reservation holder, I'm guessing there will be good information and options out by the time I have to decide.
 

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Rivian R1T (Adventure - CR, BM, 21", Ordered 10/5/2021, Delivered 6/24/2022), Suburban 2500, VW ID.4
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I definitely like the look of the OE wheels more. Also, the tires you have there aren't the same tires you get from Rivian. That's the right size, but they are LT Load Range E tires, and the Rivian tires are only XL tires, so they are lighter.

I think the price for the 20" upgrade isn't bad, especially because I would want a full size spare as well. It is only $2000 more than getting the 21s with full size spare. I thought about ordering with 21s and selling them after getting aftermarket 20s. I think you would end up with the same cost as getting them with the truck, but I like the OE wheels more than aftermarket options I have found. I am considering getting them powder coated though.
 

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Yeah I am leaning towards 21 because of the range. It will be difficult, at least initially, to find anything comparable that gets that kind of range (which could be up to 345 miles in conserve mode).

From my discussions with CS, the 21's will work decent enough for light/medium off roading. And if I find myself wanting to do more intense off roading, I'll buy some 20's like what you have proposed here.
 

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The difference in wheel size and tire tread will only manifest in advanced situations. If you're a sensible driver and won't tackle really challenging rock situations the 21" will do just fine. Actually even modestly challenging rock will be fine if you air down a little. On the other hand, the range of the 20"/AT combination won't be all that much worse. Which is why I will get it. Frankly I just like the looks better of the 20". Bottom line is you just can't go wrong here. (I would avoid the 22")
 

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Off road you want the 20's. You're not getting good offroad tires in the 21 or 22inch sizes.
Or any other tires for the 21. I thought upon release the 21s utilized a tire size that isn't produced or used by anyone else.

Personally I plan on using the 21s as my daily base set. Then Id go buy aftermarket 20's or 22's depending on your intent separately. You can spend as much or as little as you like to get it customized, find the right weights, etc.
 

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I looked into this early on- you may want to chat with CS- they told me changing anything on wheel or tire would effect the warranty. The specifics- I did not ask.

i too am looking for a 22’ tire with just a little more Tread than the street it comes with.
 

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Those wheels won't fit properly the offset is wrong. Price will massively change with offset since nobody makes a high positive offset wheel in that bolt pattern.

I found one that's close at +30 but the design is ugly.

I'm leaning towards 22s now from rivian and maybe a spare set of 20s if they will sell them to me
 

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The Saint is correct the OEM offset is +48. My issue with the OEM rim for rock climbing is sliding off a boulder and damaging the wheel because the spokes have no offset. This is shown in a you tube video.

My hours of research have resulted in not too many options to test a wheel tire combination forwheel well clearance. A local 4 wheel specialist will order one wheel to try but will not mount a tire.

Tire rack will allow me to return wheel and their mounted tire if not driven on, but their minimum offset is +20. I would try the fit at their pickup center in Denver and not drive on it for an easy return.

Rivian Service Tech says trying to raise the vehicle to off road just for clearance limits the speed to 50 mph, then the Rivian computer will take over and lower the vehicle, whoops. Rivian ST also said that the OEM Pirellis are molded with a camber and that an aftermarket tire will not track nicely on the highway. In other words, the Pirellis are custom made for the Rivian weight and driving modes. This is first hand knowledge from Rivian technicians, not social media.

I sure hope someone actually posts first hand information on their success getting and using a true off road rock climbing wheel and tire combination.
 

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R1T Launch Edition | El Cap Granite
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The Saint is correct the OEM offset is +48. My issue with the OEM rim for rock climbing is sliding off a boulder and damaging the wheel because the spokes have no offset. This is shown in a you tube video.

My hours of research have resulted in not too many options to test a wheel tire combination forwheel well clearance. A local 4 wheel specialist will order one wheel to try but will not mount a tire.

Tire rack will allow me to return wheel and their mounted tire if not driven on, but their minimum offset is +20. I would try the fit at their pickup center in Denver and not drive on it for an easy return.

Rivian Service Tech says trying to raise the vehicle to off road just for clearance limits the speed to 50 mph, then the Rivian computer will take over and lower the vehicle, whoops. Rivian ST also said that the OEM Pirellis are molded with a camber and that an aftermarket tire will not track nicely on the highway. In other words, the Pirellis are custom made for the Rivian weight and driving modes. This is first hand knowledge from Rivian technicians, not social media.

I sure hope someone actually posts first hand information on their success getting and using a true off road rock climbing wheel and tire combination.
I had my buddy in the wheel industry look into 18", but that failed. 🤦‍♂️Yellow line is a trace of our caliper on a 2D of a 18" wheel barrel.
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I had my buddy in the wheel industry look into 18", but that failed. 🤦‍♂️Yellow line is a trace of our caliper on a 2D of a 18" wheel barrel.
View attachment 6094
gemmisa, Thank you for the graphic. It is beyond my comprehension that your buddy was able to 2 D image of the fit. I always want more, so I am asking if it would be possible for your buddy to image how a 20 inch rim with +20 offset and mounted 275/65R20 in the wheel well and if it will clear?
My main objective is to inset the wheel ribs so that they do not get damaged when sliding off a boulder. The OEM rims/wheels were ill designed for rock climbing. Second objective is grippier tires than OEM. I'm working a tire rack salesman who sold a spare rim/tire mount to a Rivian owner but it was not the specifications of OEM. Hopefully the Tire rack buyer has tested the rim/tire combination and I might get factual feedback. Safe adventures, Mike
 

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gemmisa, Thank you for the graphic. It is beyond my comprehension that your buddy was able to 2 D image of the fit. I always want more, so I am asking if it would be possible for your buddy to image how a 20 inch rim with +20 offset and mounted 275/65R20 in the wheel well and if it will clear?
My main objective is to inset the wheel ribs so that they do not get damaged when sliding off a boulder. The OEM rims/wheels were ill designed for rock climbing. Second objective is grippier tires than OEM. I'm working a tire rack salesman who sold a spare rim/tire mount to a Rivian owner but it was not the specifications of OEM. Hopefully the Tire rack buyer has tested the rim/tire combination and I might get factual feedback. Safe adventures, Mike
I measured how comfortable I was with a 12mm spacer for purposes of testing how close the factory 275/65/20 tire moved to the fender lining. Results below:
Tire Wheel Vehicle Automotive tire Hood


Based on the spacer test fit, I'm looking at a getting a custom forged wheel set: 20x90+43 which is pushes the entire wheel/tire assembly 11mm outward (almost identical to above). Any more aggressive like a 20mm...I would be afraid munching my fender while driving.
 

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Those wheels won't fit properly the offset is wrong. Price will massively change with offset since nobody makes a high positive offset wheel in that bolt pattern.

I found one that's close at +30 but the design is ugly.

I'm leaning towards 22s now from rivian and maybe a spare set of 20s if they will sell them to me
Tire Rack told me this week that none of their many aftermarket wheels will work on a Rivian.
 
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