If it's too loud...you're too old

Thursday, August 27, 2009 by Hunter Leffel
Many of  the newer tires being introduced have an asymmetric design that were previously directional. 

Bridgestone RE750Bridgestone Potenza RE760 Sport
Bridgestone Potenza RE750
old directional design
Bridgestone Potenza RE760
 new asymmetric design

      

Why asymmetric design.
Europe recent phased in new stricter noise standards over the past 5 years.

as found in a Tire Rack Technical article

E.C.E. standards have been initiated that require tire "pass-by" noise meet specific limits. These standards will be phased-in beginning in 2004, when tires fitted as Original Equipment on new vehicles intended for sale in Europe must pass noise emission testing, and will continue to expand in scope until 2009, when the standards will be applied to all tires sold in Europe.
 

The entire article which covers the Economic Commission for Europe's influence on the tire industry can be found at E.C.E. Tech Article

The directional tire design, with its v-shaped pattern to pump water out of the way, was presenting challenges in meeting these new standards. 

The asymmetric tread patterns blend the different traction elements with different patterns across the face of the tread.  The inboard side typically will have small independent tread blocks for wet (and snow if an all season) traction.  The outboard side usually will consist of larger tread blocks or ribs for dry road cornering capability and increased contact patch.

In addition to lower noise levels,  the asymmetric designs allow for multiple tire rotation patterns instead of the basic front to rear of the directional tires.

In summary, the new asymmetric designs are meeting and exceeding the traction levels of the directional patterns while reducing noise and allowing better rotation combinations.


Comments on If it's too loud...you're too old

Monday, May 2, 2011 by Ronald Gustainus:
After reading this article, I guess that the new Michelin Pilot Sport tires that I'll soon be ordering for my 2008 Corvette Z06 will be quiet riding tires? Please comment. Thanks.

Sincerely,

Ronald W. Gustainus
Wednesday, May 4, 2011 by Hunter:
Thank you for your comment. The feedback from Corvette owners that have moved from the OE tire to the Michelin has been overwhelmingly positive. Please feel free to contact me directly to discuss further or when you are ready to order. I can be reached at extension 744.
Take good care,
Hunter
Thursday, February 14, 2013 by rex:
bought michelin sport a/s plus 235/50/zr17 put on acura tl 2004 they are loud, noisey and can only rotate from front to back. can i put a lower speed rating tire on it say t speed rating and get higher mileage warrenty tire with less noise i do not plan to be driving 100mph 50 years old u know.
Monday, February 18, 2013 by Hunter:
Acura has indicated a minimum of a V rated tire on that car. It is more about the handling and responsiveness of the car than the top speed rating. You can have trouble finding someone to put them on, and some stated do fail for inspections for under rated tires.

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