Rivian’s dual-motor R1T and R1S models come with two high-voltage batteries: the large pack and the max pack. However, a real-world highway range test revealed that the larger pack offers 29.2 miles of extra range, which is close to half of what is shown on the manufacturer’s and EPA’s websites. The test was conducted using the Out of Spec Reviews team, who tested both vehicles on the same wheels, tire pressure, and extras.

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