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Yes! I finally found the weight for the crappy Kelly Ultra GT tires I put on my car a few years ago: 19lbs. They are 185/65-R15s. I can switch to Bridgestone EP100s at the larger size of 205/65-R15, get the LRR benefit and a 5% diameter increase while only gaining one pound per tire/wheel, maybe eight pounds total added rotating mass. That change alone could be a 10%+ FE gain on my old car.
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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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