LOAD INDEX

LOAD INDEX & SPEED SYMBOLS


On the sidewall of all Gianroi tires you can find  the Load Index and Speed Symbol  for that tyre (following the key  sidewall markings) for example 105 S.  

 

LOAD INDEX  

The load rating  (represented by the numerical value) is related to the maximum weight that tyre  can carry. So in this case 105 would refer to a load capacity of 925kg, with  most passenger vehicle load indexes range from 62 to 126. 

Load  index

Load in Kg  per tyre

Load  index

Load in Kg  per tyre

Load  index

Load in Kg  per tyre

Load  index

Load in Kg  per tyre

Load  index

Load in Kg  per tyre

62

265

75

387

88

560

101

825

114

1180  

63

272

76

400

89

580

102

850

115

1215  

64

280

77

412

90

600

103

875

116

1250  

65

290

78

425

91

615

104

900

117

1285  

66

300

79

437

92

630

105

925

118

1320  

67

307

80

450

93

650

106

950

119

1360  

68

315

81

462

94

670

107

975

120

1400  

69

325

82

475

95

690

108

1000  

121

1450  

70

335

83

487

96

710

109

1030  

122

1500  

71

345

84

500

97

730

110

1060  

123

1550  

72

355

85

515

98

750

111

1090  

124

1600  

73

365

86

530

99

775

112

1120  

125

1650  

74

375

87

545

100

800

113

1150  

126

1700  

 In all instances the  tyres load index must meet or exceed the value displayed on the vehicles  placard.  


SPEED  SYMBOL

The speed category  symbol, for example 'S', indicates the maximum speed at which the tyre can carry  a load corresponding to its load index. So in this case, 'S' would refer to a  maximum speed of 180km/hour.

See the chart below  for a full list of speed symbols and their applicable values. 

Speed  Symbol

J

K

L

M

N

P

Q

R

S

T

U

H

V

W

Y

VR

ZR 

Speed in  kmh

100

110

120

130

140

150

160

170

180

190

200

210

240

270

300

>210  

>240  

*A tyre with ZR  symbols have a speed capability of over 204km/h. We can always consult with the  technology department to ascertain the tyres actual speed  capabilities.

 

PLY RATING  

Ply ratings identify  the load carrying capacities of a tyre in terms of plies. Ply rating originally  referred to the number of cotton layers used to strengthen a tyre's casing.  Today, when tyres are labelled 10-ply for example, they are no longer actually  constructed of 10 individual layers of cotton, but they do offer the equivalent  strength. Over time, steel ply and radial construction replaced cotton, leading  to a new distinction: Load Range. Load Range identifies the maximum amount of  weight that can be placed on a tyre horizontally, which varies depending on tyre  size and inflations limits.


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Email: info@gianroitire.cn


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