Michelin Pilot Sport A/S or PS2?
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Michelin Pilot Sport A/S or PS2?
I read excellent reviews on the PS2 and both are the same price.
The A/S has a tread rating of 400 vs. 220 on the PS2. Will I see any major difference in tread life?
The A/S has a tread rating of 400 vs. 220 on the PS2. Will I see any major difference in tread life?
The A/S are ultra high performance all season tires while the PS2 are pure max performance summer tires. So yes, the A/S tires should last a lot longer but won't be as grippy as the PS2.
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From: Marietta, Georgia
Michelin is pretty accurate about the correlation 400/220=1.8, so the A/S should last 1.8 times more miles give or take say 1.6-2.0.
The test to arrive at the mumber assume no more than 60 mph and are extrapolated from an 7,200 mile test loop in San Angelo, Texas.
"The vehicle repeatedly runs a prescribed 400-mile test loop in West Texas for a total of 7,200 miles. The vehicle can have its alignment set, air pressure checked and tires rotated every 800 miles. The test tire's and the Monitoring Tire's wear are measured during and at the conclusion of the test. The tire manufacturers then assign a Treadwear Grade based on the observed wear rates. The Course Monitoring Tire is assigned a grade and the test tire receives a grade indicating its relative treadwear. A grade of 100 would indicate that the tire tread would last as long as the test tire, 200 would indicate the tread would last twice as long, 300 would indicate three times as long, etc.
The problem with UTQG Treadwear Grades is that they are open to some interpretation on the part of the tire manufacturer because they are assigned after the tire has only experienced a little treadwear as it runs the 7,200 miles. This means that the tire manufacturers need to extrapolate their raw wear data when they are assigning Treadwear Grades, and that their grades can to some extent reflect how conservative or optimistic their marketing department is. Typically, comparing the Treadwear Grades of tire lines within a single brand is somewhat helpful, while attempting to compare the grades between different brands is not as helpful."
The test to arrive at the mumber assume no more than 60 mph and are extrapolated from an 7,200 mile test loop in San Angelo, Texas.
"The vehicle repeatedly runs a prescribed 400-mile test loop in West Texas for a total of 7,200 miles. The vehicle can have its alignment set, air pressure checked and tires rotated every 800 miles. The test tire's and the Monitoring Tire's wear are measured during and at the conclusion of the test. The tire manufacturers then assign a Treadwear Grade based on the observed wear rates. The Course Monitoring Tire is assigned a grade and the test tire receives a grade indicating its relative treadwear. A grade of 100 would indicate that the tire tread would last as long as the test tire, 200 would indicate the tread would last twice as long, 300 would indicate three times as long, etc.
The problem with UTQG Treadwear Grades is that they are open to some interpretation on the part of the tire manufacturer because they are assigned after the tire has only experienced a little treadwear as it runs the 7,200 miles. This means that the tire manufacturers need to extrapolate their raw wear data when they are assigning Treadwear Grades, and that their grades can to some extent reflect how conservative or optimistic their marketing department is. Typically, comparing the Treadwear Grades of tire lines within a single brand is somewhat helpful, while attempting to compare the grades between different brands is not as helpful."
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