原帖由 老杨 于 2007-8-8 07:34 发表 ) k. C8 q+ M* Q/ e$ ]( g0 N. l
1、省油 ; a( e5 }1 L+ C7 o- ^
平均每个铝合金轮毂比相同尺寸的钢轮毂轻2kg,一台轿车用5个便省了不起10kg重量。根据日本实验,5座的轿车重量每减轻1kg,一年约或节省20L汽油。而美国汽车工程师学会发表的研究报告指出,铝合金轮毂 ...
' ]# q' b& K! l 2 Q9 N' V8 x7 ?5 C4 V! i& DYou forgot to distinguish the difference between mounted mass and unmounted mass. The 2kg advantage is much more than it sounds, since it's unmounted mass.