这个是车门上的轮胎气压铭牌。

1、正常负荷下为225kpa，最大负荷下225kpa(同一个车，负荷增大了，胎压是不是也会变大，还能是225？)
2、负荷指标为91且速度等级不低于W(什么意思？)

[IUJIPKCL 编辑于 2011-08-31 21:02]

负荷指(数)标是把1条轮胎所能承受的最大负荷以代号的形式表示的。 例如：负荷指数为100的1条轮胎的最大负荷是800kg。
        负荷指数   千克         负荷指数         千克
              71         345                99                 775
              72         355               100                800
              73         365               101                825  
              74         375               102                250
              75         387               103                875
              76         400               104                900
              77         412               105                925
              78         425               106                950
              79         437               107                975
              80         450               108               1000
              81         462               109               1030
              82         475               110               1060
              83         487               111               1095
              84         500               112               1129
              85         515               113               1164
              86         530               114               1200
              87         545               115               1237
              88         560               116               1275
              89         580               117               1315
              90         600               118               1355
              91         615               119               1397
              92         630               120               1440
              93         650               121               1485
              94         670               122               1531
              95         690               126               1578
              96         710               124               1627
              97         730               125               1677
              98         750