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Old 08-10-2014, 09:58 AM   #10 (permalink)
California98Civic
Cyborg ECU
 
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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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What they all said. And I run 175/70-R13 Michelin Defenders because they were the only LRR tire available to me for the VX wheels. Your 14" HX wheels have a couple more choices. Still. I like the Defenders. Your stock tires size in 185/65-R14. So 175/70s will be almost the same diameter, but narrower, which is better for aero, somewhat. If you go wider, you can get taller with the same wheel, but wider is not better than narrower for FE. If you get bigger wheels, you can have taller and narrower, like a 175/65-R15 or something... but your HX wheels are so light (10.8lbs?) that almost anything else adds weight and adds it farther from the hub, increasing the rotational mass effect.

You have great wheels. Keep 'em. I would put LRR 175/70-R14s on 'em from Michelin or Bridgestone.
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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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