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About Barry Smith
Expertise
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
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.

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Tires - tire size

Expert: Barry Smith - 7/2/2009

Question
what size tires came on a 1977 gmc sprint. we are redoing one and want the right tires

Answer
Linda,

I could not find any reference to a GMC Sprint in my tire books, but I understand that a GMC Sprint was the same as an El Camino - and if that is true, a 1977 came with GR78-15's or HR78-15's, except for the SS version which came with GR70-15's.

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