原帖由 老杨 于 2007-8-8 07:34 发表 ( l# ]% X- O& B' z5 g1、省油 . c, c8 ?5 o. n7 S5 z# Y x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 ...
# O6 h" |( ]/ {- z * y$ ^/ K' {& E) H$ L1 SYou 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.