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Old 06-11-2011, 04:10 PM   #12 (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
90 day: 3671.43 mpg (US)
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Quote:
Originally Posted by bwilson4web View Post
Sumitomo T4, low rolling resistance tires, Tire Rack price does not include shipping, mounting and balancing.
175/70R13 - 1,036 lbs - 51 psi - 927 rev/mile - $52/ea
185/70R13 - 1,135 lbs - 51 psi - 907 rev/mile - $60/ea
So the 185's rev a little more than 2% less than the 175s? That should mean the difference between these two tires in terms of MPG at 5th gear highway speeds would be a little over 1% maybe? In a car like an 80's CRX that's possibly a difference of 1.5-2.0mpg at highway speeds, no? If true and the 185s fit my CRX, that's what I would buy. SentraSE-R and others, such as arcosine, seem to have found that despite the larger sizes (worse aero) and heavier weights, that the taller gearing is a net benefit (on the highway, at least).
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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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