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Tire size vs MPG - EPA test results
The new different trim levels of the new Honda Accord Hybrid come with different tire sizes, and different EPA gas mileage results. The lower trim levels have 225/50 tires on 17 inch wheels, and get 48 EPA MPG. The higher trim levels have 235/40 tires on 19 inch wheels and get 44 EPA MPG.
The wider tires are 0.5" larger diameter, or 2%. The 2% diameter difference does not explain the 9% MPG difference. And 10 mm width difference should not cause enough increased air drag to cause the 9% MPG difference. I suspect that the narrower tires are LRR, and the wider tires are not.
Article: https://arstechnica.com/cars/2021/04...accord-hybrid/
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06 Canyon: The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
22 Maverick: Summer 2022 burned 62.74 gallons in 3145.1 miles for 50.1 MPG. Winter 2023-2024 - 2416.7 miles, 58.66 gallons for 41 MPG.
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