Quote:
Originally Posted by Fundguy1
Curious why. Because they are lighter? They are more narrow so less tire.
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Yes, 343M's are forged, while the 601M's are cast.
They're the same specs, just as long as they're for the same car. M5 widths are 9 and 10, while M6 widths are 9.5 and 10.5 (for both 343M and 601M).