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      11-07-2012, 01:47 AM   #1
Drives: 2011 M3
Join Date: Sep 2011
Location: Toronto

Posts: 964
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How much merit is there to these "ultra light" rims

Ok, so I'm not new at this. I understand the concept of rotational inertia. I understand the concept of unsprung weight. I know it helps in theory BUT ...

I look at the pricing of these ultralight rims and think to myself: is this for real??? I mean, all things being equal, how much time/lap are people going to shave off by saving 2lbs/corner on the same size rim? Can someone clarify this for me? Does anyone have first hand experience or even better - concrete data that proves me wrong?

This is only an opinion so lets not start a war here.
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