A respected testing organization awards the Pirelli P Zero Nero All Season first prize among ultra-high-performance all-season tires -- but the Bridgestone Potenza RE970AS Pole Position (*Est. $185) edges it in a more recent expert test on wet and dry pavement. In that test, the Pirelli actually posts faster lap and slalom times, but testers complain that it's less communicative to the driver than the Bridgestone.
On winter roads, the Pirelli gets good ratings in one test -- but owners say it doesn't grip nearly as well on snow and ice as the Continental ExtremeContact DWS (*Est. $160), which wins an Arctic Circle winter driving test at TireRack.com (the Pirelli doesn't compete in that test).
ConsumerReports.org includes the Pirelli P Zero Nero All Season in its latest comprehensive test of 20 ultra-high-performance all-season tires. Experts at TireRack.com also test the Pirelli, pitting it against seven of its rivals in two separate tests. TireRack.com ranks the Pirelli against more than two dozen competitors based on owner reviews posted to the site. SaferCar.gov, the website of the National Highway Traffic Safety Administration, lists official traction, tread-wear and heat-resistance ratings for most tires on the market.
ConsumerReports.org tests the Pirelli P Zero Nero All Season alongside 19 other ultra-high-performance all-season tires. Editors rank the tires from best to worst based on their performance on wet, dry, snowy and icy roads, as well as for their ride quality, quietness, rolling resistance and tread life.
Review: Ultra High Performance All-season Tire Ratings, Editors of ConsumerReports.org
2. Tire Rack
The Pirelli P Zero Nero All Season places second in this expert test of four UHP all-season tires. It posts faster lap and slalom times on both dry and wet pavement than the winning Bridgestone Potenza RE970AS, but testers prefer the way the Bridgestone communicates with the driver.
Review: Testing Bridgestone's Potenza RE970AS Pole Position Ultra High Performance All-Season Tire, Editors of TireRack.com, June 1, 2011
3. Tire Rack
With more than 200 owner reviews posted, the Pirelli P Zero Nero All Season earns an average rating of about 8 out of 10. A link leads to a chart that shows how all of the ultra-high-performance all-season tires stack up. The P Zero Nero All Season ranks ninth, with lower scores than top-rated tires like the Bridgestone Potenza RE970AS Pole Position.
Review: Pirelli PZero Nero All Season, Contributors to TireRack.com
This government website lists official traction, tread-wear and heat-resistance ratings for most tires. The Pirelli P Zero Nero earns the highest traction and heat-resistance ratings in most of its sizes. Its tread-wear rating of 400 is not high, but it is respectable considering its high-performance class.
Review: Tire Rating Lookup, Editors of SaferCar.gov