Im getting slightly off topic here, but I think the reason why Rivian does not approve chains on the R1 w/ 20” wheels is that they will rub on the fender well or contact one of the control arms. I saw a photo showing very tight clearance between the AT tire and control arms, and in another thread of the AT tires rubbing on the wheel liner (not fender lip) spirited driving (@Riviot).
Whether the chain rub might only be in low or lowest height setting, or even at standard is anyone’s guess.
I’ll definitely have a set of chains regardless of our final wheel choice, 20” or 21”. For the 21” they could get regular use in the winter, whereas they would be Plan C or D for the 20” wheels.
