Here’s Exactly How Big Car Wheels & Tires Kills A Car’s Fuel Economy

Some cars have larger tires than others. Especially the same vehicles of different trim levels. For instance, the 2023 Honda Accord Hybrid has a 19-inch tire, while the EX-L trim level of the same 2023 Honda Accord Hybrid has a 17-inch tire. This also affects their fuel economy. The EX-L has 51 mpg, while the Sport trim has 46 mpg.

They have different fuel economies due to their car tires and wheels. So, why do larger wheel and tire cars have less fuel economy? Here are the three reasons why:

1. Large Tires Are Heavier & Require More Energy To Move

 The major reason larger wheels and tires have less fuel economy is their functionality. They are heavier, and the car’s hub will require more energy to get the wheels moving, thus, hurting the car’s fuel efficiency or EV range.

2. Larger Tires Are Wider, Which Creates More Wind Resistance At Higher Speed

A car with a large wheel and tire setup doesn’t only have a larger diameter but a wider diameter. The wider diameter creates more wind resistance. While the car drives, the wind resistance makes it less aerodynamic, which in turn hurts its fuel efficiency.

3. Bigger Tires Have A Larger Contact Patch With The Ground & It Creates More Rolling Resistance

Larger car tires have a larger contact patch with the ground. This larger contact means great performance since there’s more traction. However, it also creates more rolling resistance. That resistance leads to a drop in fuel efficiency or EV range.

This is why automakers outfit EVs and hybrid cars with low rolling resistance tires from the factory. 

Conclusion

Larger wheels and tires affect the fuel economy of a vehicle. While there’s no certainty how much it affects a car’s fuel economy, if you want a car with better fuel economy, then cars with smaller tires and wheels are the best option.