zumbooruk
Senior Member
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- 2025 FL5, 2014 Chevy Suburban (wife), previous 2007 FA5
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[UPDATE]
It seems that the Autoweek article was alarmist and incomplete and that there is little reason to worry (though I am a black belt worrier)
UHP summer tires are not exempt as competition tires, but they are in the more lenient “ultra-high-performance” category, and are likely already (or will be) compliant (my guess: higher pressure and low/stiff sidewalls)
The definition of “ultra high-performance” section 3302(62) page 37 is W or Y speed symbol, 168 mph or more, and relative wet-grip index of at least 1.45
Section 3306(b) page 56 sets the UHP category at 9.8 N/kN (tires manufactured on or after 1 January 2029) and 8.5 N/kN (tires manufactured on or after 1 January 2033).
https://efiling.energy.ca.gov/GetDocument.aspx?tn=271526
[/UPDATE]
The California Energy Commission unanimously approved the Replacement Tire Efficiency Program, the first regulation of its kind in the country. It requires replacement tires sold for passenger vehicles and light-duty trucks to meet rolling-resistance standards, a measure of how much energy a tire loses as it rolls. Lower resistance improves gas mileage and extends range for electric vehicles.
https://www.autoweek.com/news/a73499583/low-rolling-resistance-tires-in-california/
https://www.energy.ca.gov/proceeding/replacement-tire-efficiency-program-proceeding
It seems that the Autoweek article was alarmist and incomplete and that there is little reason to worry (though I am a black belt worrier)
UHP summer tires are not exempt as competition tires, but they are in the more lenient “ultra-high-performance” category, and are likely already (or will be) compliant (my guess: higher pressure and low/stiff sidewalls)
The definition of “ultra high-performance” section 3302(62) page 37 is W or Y speed symbol, 168 mph or more, and relative wet-grip index of at least 1.45
Section 3306(b) page 56 sets the UHP category at 9.8 N/kN (tires manufactured on or after 1 January 2029) and 8.5 N/kN (tires manufactured on or after 1 January 2033).
https://efiling.energy.ca.gov/GetDocument.aspx?tn=271526
[/UPDATE]
The California Energy Commission unanimously approved the Replacement Tire Efficiency Program, the first regulation of its kind in the country. It requires replacement tires sold for passenger vehicles and light-duty trucks to meet rolling-resistance standards, a measure of how much energy a tire loses as it rolls. Lower resistance improves gas mileage and extends range for electric vehicles.
https://www.autoweek.com/news/a73499583/low-rolling-resistance-tires-in-california/
https://www.energy.ca.gov/proceeding/replacement-tire-efficiency-program-proceeding
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