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Tire Ratings and Tire Safety

Load Index


This two or three-digit number is the tire's load index. (95) It is a measurement of how much weight each tire can support vertically or how much weight you can put on top of the tire. These ratings are done under laboratory conditions (dry and normally around 65 degrees) so you should keep that in mind if you are driving in temperatures and/or conditions that are significantly distant from them.
Most tires manufactured for passenger cars and light trucks indexes range from 70 to 110.

Load Index

Pounds

Kilograms

 

Load Index

Pounds

Kilograms

71

761

345

91

1356

615

72

783

355

92

1389

630

73

805

365

93

1433

650

74

827

375

94

1477

670

75

853

387

95

1521

690

76

882

400

96

1565

710

77

908

412

97

1609

730

78

937

425

98

1653

750

79

963

437

99

1709

775

80

992

450

100

1764

800

81

1019

462

101

1819

825

82

1047

475

102

1874

850

83

1074

487

103

1929

875

84

1102

500

104

1984

900

85

1135

515

105

2039

925

86

1168

530

106

2094

950

87

1201

545

107

2149

975

88

1235

560

108

2205

1000

89

1279

580

109

2271

1030

90

1323

600

110

2337

1060

Source: tirerack.com

Itís not recommended that you replace tires rated by the manufacturer with lower rated tires. Also if you intend on exceeding loads the manufacturers recommended tire can handle then you should replace them accordingly. Always check with their service representatives though because there are other considerations to take into account such as front, rear end and suspension capacities that if exceeded could be damaged even if the tire load is supported.



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