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Old 12-18-2013, 03:10 AM   #16 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
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Quote:
Originally Posted by mcrews View Post
It's less than 1/2 inch. Remember 1/4 on each side
the difference between 195mm and 215mm is 20, which is 4/5 of an inch. I do think these tire widths have been tested by metro or someone on this site. Small differences in width can make a difference, IIRC, was the take away. The tire is a rapid spinning rough surface in the flow of air... so search for the tests, if you are interested. But I'd also wonder about the greater contact patch and whether a wider tire of an LRR brand would have greater rolling resistance than a narrower tire of the same LRR brand. Also relative tire weights might offset wheel weights. If the 14" steelies are 20lbs but have 19lbs 175/70-14 Michelin Defenders on them, they dont weigh more than 16lbs 15" alloys with a 23lbs set of 215mm defenders on. There is a thread on here "tall tire test" that you might read too... very thorough, if you want to get this in depth about it. in the end you gotta love what you drive and so you ought to get what you'll love.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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