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Tyre wear is proportional to the fourth power of wheel load; reducing weight per wheel is the key here.

Hiwever, taxing new tyres may be counterproductive, since encouraging folk to keep using their worn tyres is not a good outcome for road safety.

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potato3732842 16 hours ago | parent | next [-]

Tyre wear is proportional to the fourth power of wheel load; reducing weight per wheel is the key here.

No, it's not.

You're taking a very loose rule of thumb for road surface wear and baselessly applying it to tires.

Tire wear follows the rubber the tire is made out of. Soft rubber wears faster. Once you control for that it's acceleration and braking loads (i.e. driving style) that dominate. After that is when weight starts mattering.

If what you said was even remotely true then heavy vehicles would get obviously less life out of tires compared to compact cars when in reality they get about the same

	▲	david-gpu 16 hours ago \| parent \| next [-]
		> If what you said was even remotely true then heavy vehicles would get obviously less life out of tires compared to compact cars when in reality they get about the same Are you assuming that the tires of heavy vehicles have the same thickness as lighter vehicles? My bike has much thinner tires than any car, and they can last ten thousand kilometers.
	▲	danielheath 12 hours ago \| parent \| prev [-]
		I'm not sure where you're getting these ideas from. Best estimate I can see of prime mover tyre lifespan is 40,000-120,000 km. I'd be quite happy if I could get that kind of lifespan out of my cars tyres.

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qwerty_clicks 16 hours ago | parent | prev [-]

Tires these days are expensive. To make them cheaper, they have reduced quality as well. Likely wearing faster and with worse material