That process is helped by Rivian's new system architecture introduced in the Gen 2 R1 platform last year. This not only greatly simplified the architecture of the vehicles, cutting cost and weight, but it enabled far more finite control over those motors.

Rivian has changed how its eco driving mode works in the 2026 R1T and R1S Quad after first-gen owners burned through tires in under 6,000 miles.

Rivian already made the most compelling electric trucks in the world. But the new Quad-Motor versions raise the bar.