How many MPG does a 2026 Rivian R1S Tri Max get?

The 2026 Rivian R1S Tri Max gets 76 MPG combined according to the EPA — about 81 MPG in the city and 70 MPG on the highway. Combined MPG is a 55% city / 45% highway blend.

What is the annual fuel cost for a 2026 Rivian R1S Tri Max?

Driving 15,000 miles a year at 76 MPG combined, the 2026 Rivian R1S Tri Max uses about 197 gallons of fuel per year — roughly $690 at $3.50/gallon. Your real cost varies with local gas prices and driving style.

What is the difference between city and highway MPG on the 2026 Rivian R1S Tri Max?

The 2026 Rivian R1S Tri Max returns 81 MPG city and 70 MPG highway. Highway is higher because steady-speed cruising avoids the stop-and-go acceleration that burns fuel in city driving. The 76 MPG combined figure blends the two.

Is 76 MPG good for a standard sport utility vehicle 4wd?

For a standard sport utility vehicle 4wd, 76 MPG combined is very efficient. Hybrid powertrains push this higher.

2026 Rivian R1S Tri Max MPG

Official EPA fuel-economy rating for the 2026 Rivian R1S Tri Max.

EPA combined fuel economy

76MPG

combined (55% city / 45% hwy)

City

MPG

Highway

MPG

Engine

—

Cylinders

—

Drive

4WD

Class

Standard Sport Utility Vehicle 4WD

Running cost

Estimated annual fuel cost

Per year

$690

15,000 mi/yr

Fuel used

197 gal

per year

At gas price

$3.50

per gallon

Based on 76 MPG combined and 15,000 miles per year. Adjust for your local gas price and annual mileage.

Other Rivian R1S Tri Max years

2025 All years →

FAQ

2026 Rivian R1S Tri Max

How many MPG does a 2026 Rivian R1S Tri Max get?: The 2026 Rivian R1S Tri Max gets 76 MPG combined according to the EPA — about 81 MPG in the city and 70 MPG on the highway. Combined MPG is a 55% city / 45% highway blend.
What is the annual fuel cost for a 2026 Rivian R1S Tri Max?: Driving 15,000 miles a year at 76 MPG combined, the 2026 Rivian R1S Tri Max uses about 197 gallons of fuel per year — roughly $690 at $3.50/gallon. Your real cost varies with local gas prices and driving style.
What is the difference between city and highway MPG on the 2026 Rivian R1S Tri Max?: The 2026 Rivian R1S Tri Max returns 81 MPG city and 70 MPG highway. Highway is higher because steady-speed cruising avoids the stop-and-go acceleration that burns fuel in city driving. The 76 MPG combined figure blends the two.
Is 76 MPG good for a standard sport utility vehicle 4wd?: For a standard sport utility vehicle 4wd, 76 MPG combined is very efficient. Hybrid powertrains push this higher.

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