"...adopt a replacement tire efficiency program “designed to ensure that replacement tires sold in the state are at least as energy efficient, on average, as tires sold in the state as original equipment on new passenger cars and light-duty trucks.” Replacement tires are those purchased by drivers to replace existing tires."

Tires are not car-specific. This sounds like you couldn't just go out and buy some random tires, you could only buy tires that are designated for your specific vehicle. And that owners of two vehicles with the same size tires would have different allowed tire choices, depending on what their OEM tires were.

Put another way, is this saying you can't buy wider than OEM tires, and that you can't buy all-terrain tires for something that came with street tires?

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winrid 13 hours ago | parent [-]

It's "on average", so no, you still can.

And what are they gonna do if you just go to the tire store and say I want X tires? So of course none of this will be enforced. It's just to provide the little leaf indicator.

	▲	butvacuum 3 hours ago \| parent \| next [-]
		It is already difficult to get most aftermarket parts in california- especially things in the combustion path. Can't even buy them off ebay.
	▲	AlexandrB 3 hours ago \| parent \| prev [-]
		This kind of "average" nonsense in the form of CAFE[1] standards is why we have endless SUVs and crossovers on the road now. I expect that this will lead to similar unintended consequences. [1] https://en.wikipedia.org/wiki/Corporate_average_fuel_economy > A complicated 2011 mathematical formula was replaced starting in 2012 with a simpler inverse-linear formula with cutoff values.[10] CAFE footprint requirements are set up such that a vehicle with a larger footprint has a lower fuel economy requirement than a vehicle with a smaller footprint.