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I have over 30 years experience in the design, manufacturing, and testing of tires. I have served as the technical advisor to the "800" number. I have authored or co-authored many publications - usually without credit. I can answer almost any technical question, but please don`t ask me to compare brands. I probably have prejudices because of my work experience.

Experience in the area

Member SAE (Society of Automotive Engineers) Member Tire Society (Tire Technical Organization) SCCA Regional Competiton License holder Authored many training manuals on tires, their care and use.


SAE (Society of Automotive Engineers) SCCA (Sports Car Club of America) Tire Society


You may want to visit my web site:


I am a graduate of the University of Dayton, Dayton, OH - BME, 1971 I attended graduate school at the University of Akron - but did not complete my PhD - something I regret.

What do you still hope to achieve/learn in this field?

I want to dispell many of the "myths" about tires so people will be better informed.

Something interesting about this subject that others may not know:

Tires are a highly engineered product that face some of the most severe environments - the road.

Something controversial or provocative about this subject

The vast majority of tire failures are caused by road hazards and lack of proper tire maintenance, not manufacturing defects.

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Patrick11/15/16101010Thanks for your help.
Steve09/14/16101010Thanks for your time and Response so .....

Recent Answers from Barry Smith

2017-03-21 Tire "cupping":

Jim,    Cupping means quite a few different things.  The easiest way to say this is *irregular wear* - of which there are several kinds.  Most common cause is low inflation pressure and lack of rotation

2017-03-21 lug nnut torgue:

Jerry,    Yes, The standard recommendation is that lug nuts need to be retorqued on alloy wheels after 50 or so miles.     - HOWEVER -     Not only am I of the opinion that what the torque spec ought to

2016-10-16 Non-Matching Front and rear tires:

Damon,    Because of the peculiar nature of 911's, Porsche has a specification they call an *N Spec*, where they indicate which tires are compatible with this peculiar nature of 911's.    So unless the

2016-09-18 tire pressure:

Skip,    You asked:    1. How is it that cold pressure can vary but hot pressure always levels out at the "correct" driving pressure and stays there while driving? That just seems to defy logic!

2016-09-13 Bf Goodrich at truck tires:

Steve,    Noise is not dependent on tire rotation direction nor mounting inside por out.  So even if the tire are mounted incorrectly, they will not make more noise than if mounted correctly.    But All


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