Thread: Wheels: Smaller rims, taller sidewalls?
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Old 07-01-2021, 10:12 AM   #38 (permalink)
California98Civic
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Black and Green - '98 Honda Civic DX Coupe
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Quote:
Originally Posted by CapriRacer View Post
OK, where did that 4% info come from?

If I use my RR by size calculator (Barry's Tire Tech), I get a 2.02% difference in favor of the 18".
I think he means 4% better and fuel economy, not 4% difference in RPMs. That's why he references blanking out the ventilation holes on the rims.
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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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