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Tyre Speed Rating & Load Index

Load Index & Speed Symbol (Service Description)

These numbers and letter together are called the service description. The numbers indicate the tyre’s maximum “load” rating, or the amount of weight the tyre can bear (“93” stands for 650 kilograms, or 1433 pounds), and the letter denotes the speed rating, or how fast the tyres can safely rotate (“W” means 270 km/h, or 168 mph). The lowest rating typically found on passenger-car tyres is “Q,” which means 99 mph. The highest, “Y,” is good for 186 mph, and when enclosed in parenthesis, as in “(93Y),” it means “in excess of” 186 mph. These values are determined by tyre-testing machines in a lab, and the decoded load rating is also listed elsewhere on the tyre.

 

Load Index

load indexLBSKG
71 761 345
72 783 355
73 805 365
74 827 375
75 853 387
76 882 400
77 908 412
78 937 425
79 963 437
80 992 450
81 1019 462
82 1047 475
83 1074 487
84 1102 500
85 1135 515
86 1168 630
87 1201 545
88 1235 560
89 1279 580
90 1323 600
load indexLBSKG
91 1356 615
92 1389 630
93 1433 650
94 1477 670
95 1521 690
96 1565 710
97 1609 730
98 1653 750
99 1709 775
100 1764 800
101 1819 825
102 1874 850
103 1929 875
104 1984 900
105 2039 925
106 2094 950
107 2149 975
108 2205 1000
109 2271 1030
110 2337 1060

Speed Rating

 MAXIMUM SPEEDTYPE / VEHICLE TYPE
L 75 mph 120 km/h Off-Road & Light Truck Tires
M 81 mph 130 km/h Temporary Spare Tire
N 87 mph 140 km/h Temporary Spare Tire
O 99 mph 160 km/h Winter 4x4
Q 106 mph 170 km/h Heavy Duty Light Truck
R 112 mph 180 km/h Family Sedans & Vans
S 118 mph 190 km/h Family Sedans & Vans
T 124 mph 200 km/h Sedans & Coupes
U 130 mph 210 km/h Sport Sedans & Coupes
V 149 mph 240 km/h Sports Cars
W 149+ mph 240+ km/h Sports Cars
X 168 mph 270 km/h Exotic Sports Cars
Y 186 mph 300 km/h Exotic Sports Cars
(Y) 186+ mph 300+ km/h Exotic Sports Cars