Why does larger wheels/tires on a car cause significantly reduced mpg, and more stress on the transmission and suspension?
I get that they may weigh more, but a larger diameter means that you go farther in one rotation, so shouldn’t you be able to go farther with the same amount of work from the engine?
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It doesn’t necessarily increase or decrease mpg, it can do either, depending on if the gear ratio is closer to the ideal for whatever speed/load you’re at. It will increase load on the transmission because the bigger diameter needs more torque from the driveshaft to get the same force to the road.
If your car has a MPG meter, it will read lower MPG even if real MPG increases, because it doesn’t know you put bigger wheels on.
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