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Old 07-18-2009, 07:49 PM   #3 (permalink)
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Originally Posted by brucepick View Post
You should weigh the two wheel/tire combinations and see if one is heavier.
Just weighing won't give an accurate answer: what matters is the rotational inertia, which is mass * distance from axis. So if you had two wheel/tire sets that weighed the same, one with a heavy tire & light wheel, and one with a light tire & heavy wheel, the heavy wheel set would have less inertia.

I've wondered about this sometimes: would a big rim & skinny tire be more efficient?
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