how does using smaller tyres on a car improve it’s range/fuel efficiency?

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From my theoretical understanding shouldn’t larger tyres give you more range? My reasoning being that larger tyres = more distance travelled in a single rotation.

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Anonymous 0 Comments

Rule of thumb: The smaller the contact surface, the lower the friction.

Thinner and smaller tires have less friction with the road surface thus less loss of energy to heat. Pumping up your tires over the recommended pressure level would do the same (but potentially cause a rapture) because the tire gets less deformed while rotating.

BUT VERY IMPORTANT: less contact surface and less friction also causes a longer braking distance! Because it’s the friction of the road to the tire that is stopping you from sliding! So I don’t recommend switching your tires to smaller, thinner ones or pumping them up over the recommended pressure level!

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