Quote:
Originally Posted by CanAutM3
Well for one the 640M are cast while the 513M are forged. The 640M are therefore heavier and less strong. The spokes on the 640M are quite thicker and have less space between the "twin spokes". And in terms of colour, the 640M are silver while the 513M are ferric grey, which is a darker shade of grey. Finally they have slightly different offsets (29/40 vs 27/29 F/R for the 513M vs 640M respectively).
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Thanks, So then wouldn't you want a stronger wheel for winter anyway(more pot wholes, more snow on the ground so could be hitting more curbs), which would be the 513M instead of the 640M? I guess what am asking is what's special about the 640 that makes it the "winter wheels" apart from the fact that they are cheaper.