The Rivian R1S SUV and R1T pickup have been given a handful of updates for the 2027 model year that focus on comfort, capability, and trim-hierarchy simplicity.The R1S now offers second-row captain's chairs for the first time, and the R1T offers a 20-inch all-season tire package that balances off-road ability with on-road range.Rivian has also (mostly) ditched its previous motor-count naming scheme for both R1 models, instead adopting a simplified Premium, Performance, and Quad trim strategy.