The staff report [0] seems pretty reasonable. Essentially manufacturers measure their tires using ISO 28580:2018 [1] and self-report to a future state tire portal. I wish that test was available when I last bought tires and look forward to seeing it next go round.

Undoubtably, consumers will quickly adopt tires in an exempt category like "Specialty tires, including certain off-road tires, low-speed tires, deep-tread tires, winter snow tires, space-saver tires, and temporary-use tires" and the unintended consequence will be that vehicle energy efficiency as a whole will decline.

0. https://efiling.energy.ca.gov/GetDocument.aspx?tn=269612

1. https://www.scribd.com/document/915700524/ISO-28580-2018

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mmooss 3 hours ago | parent [-]

> Undoubtably

We need a better argument than that.

HN are obsessed with the 'unintended consequences' argument against regulation, a very general idea applied to an actual situation, and as if people can't and don't anticipate and make effective plans.

The world turns, things work, regulations work - not everything in the world, but we accomplish a lot. My roads, medications, air traffic, etc. etc. work; people's planning and ideas succeeded.

	▲	adolph an hour ago \| parent [-]
		> We need a better argument than that. I'm not arguing for or against this consumer information regulation. It would not surprise me if most tire industry folks support it since a acknowledged standard increases consumer trust in the claims of a premium product. Good regulation creates wins for both consumers and producers. Bad regulation typically tries to nudge either consumers or producers in a direction contrary to the prevailing culture and/or economics. To the extent that CA will attempt to reduce consumer choice, different methods will exploit the regulation's leaks, like which tires it does not cover. A direct corollary is US fuel economy standards leading to the rise of the SUV as an vehicle format. People may disagree on causes, but "[t]here is some evidence that this happened with an increase in market share of lower fuel economy light trucks and SUVs and decline in passenger car sales, as a percentage of total fleet sales, as car buying trends changed during the 1990s. . ." [0] Another fun example is the development of "trunking." I'm not a CA teen so lack direct experience, and things are undoubtably overhyped, but enough people started doing it for a law to be passed specifically criminalizing the practice. Why would anyone ride in the trunk of a car? Because CA outlawed passengers in cars driven by teens. 0. https://en.wikipedia.org/wiki/Corporate_average_fuel_economy 1. https://www.ocregister.com/2007/01/03/trunking-law-for-the-d...