2025 Rivian R1s Reviews. The rivian r1s has a range of stock tire sizes, including 275/65r20 tires, 275/55r21 tires and 275/50r22 tires. Research the 2025 rivian r1s with our expert reviews and ratings.

Tipping the scales at over 3000kg, the rivian r1s is a whopper. The designs of these vehicles is pretty different.