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How much rolling resistance for 775/15 tires in foot pounds per various speeds? I understand it is about 1.5% times vehicle weight. Can you give me three points (30mph, 60mph and 80mph)? Thank you.

Answers from the Automotive Experts

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear L, Most likely you will have to contact your tire manufacturer for this information. I did find a consumer reports site that claims to have these numbers, but you need to be a member to get them. Here's the site: http://blogs.consumerreports.org/cars/2006/08/tires_roll_out_.html You can also check out this article as well. http://www.greenseal.org/resources/reports/CGR_tire_rollingresistance.pdf Lori Johnson

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