Load range

The Load Range Letter on light-truck tires indicates their ply rating.

Load Range Ply Rating
A 2
B 4
C 6
D 8
E 10
F 12
G 14
H 16
J 18
L 20
M 22
N 24
Load index

The load index on a passenger-car tire is a numerical code stipulating the maximum load (mass, or weight) each tire can carry. For Load Range “B” tires, ETRTO (ISO-Metric) standards specify the load index rating at an inflation pressure of 36 psi (250 kPa) (table below), while P-Metric standards measure the load capacity at an inflation pressure of 35 psi (240 kPa). The two standards vary slightly with the capacity required for different inflation pressures.

While all ETRTO tires of the same load index will have the same maximum load, P-Metric tires with the same load index may have different load capacities depending on the tire size. The TRA Inflation Tables must always be consulted when comparing the load capacity of P-Metric tires; the Load Index alone is not sufficient. An example: a P205/50R15 Standard Load tire has a load index of 84 and a load rating of 505 kg (1,113 lb) at 35 psi (240 kPa). A P215/50R13 with the same load index of 84 only has a load rating of 495 kg (1,091 lb), also at 35 psi (240 kPa).

ETRTO produces a Standards Manual (current edition 2010), which contains a number of specifications and tables. The load index table (2010 page G7) lists the Load index from 0–45 kg (0–99 lb) to 279–136,000 kg (615–299,829 lb) (although it appears to relate to an inflation pressure of 42 psi (290 kPa) it doesn’t specify, but see Load Inflation Table). The Load Inflation Table references the load index to inflation pressures between 22 psi (150 kPa) and 42 psi (290 kPa) at 1 psi (6.9 kPa) intervals which is too large to be included here.

Standard load table (extract from ETRTO standards manual – 2010 page G7
ref 42 psi (290 kPa))
Code Weight Code Weight Code Weight Code Weight
60 250 kg (550 lb) 80 450 kg (990 lb) 100 800 kg (1,800 lb) 120 1,400 kg (3,100 lb)
61 257 kg (567 lb) 81 462 kg (1,019 lb) 101 825 kg (1,819 lb) 121 1,450 kg (3,200 lb)
62 265 kg (584 lb) 82 475 kg (1,047 lb) 102 850 kg (1,870 lb) 122 1,500 kg (3,300 lb)
63 272 kg (600 lb) 83 487 kg (1,074 lb) 103 875 kg (1,929 lb) 123 1,550 kg (3,420 lb)
64 280 kg (620 lb) 84 500 kg (1,100 lb) 104 900 kg (2,000 lb) 124 1,600 kg (3,500 lb)
65 290 kg (640 lb) 85 515 kg (1,135 lb) 105 925 kg (2,039 lb) 125 1,650 kg (3,640 lb)
66 300 kg (660 lb) 86 530 kg (1,170 lb) 106 950 kg (2,090 lb) 126 1,700 kg (3,700 lb)
67 307 kg (677 lb) 87 545 kg (1,202 lb) 107 975 kg (2,150 lb) 127 1,750 kg (3,860 lb)
68 315 kg (694 lb) 88 560 kg (1,230 lb) 108 1,000 kg (2,200 lb) 128 1,800 kg (4,000 lb)
69 325 kg (717 lb) 89 580 kg (1,280 lb) 109 1,030 kg (2,270 lb) 129 1,850 kg (4,080 lb)
70 335 kg (739 lb) 90 600 kg (1,300 lb) 110 1,060 kg (2,340 lb) 130 1,900 kg (4,200 lb)
71 345 kg (761 lb) 91 615 kg (1,356 lb) 111 1,090 kg (2,400 lb) 131 1,950 kg (4,300 lb)
72 355 kg (783 lb) 92 630 kg (1,390 lb) 112 1,120 kg (2,470 lb) 132 2,000 kg (4,400 lb)
73 365 kg (805 lb) 93 650 kg (1,430 lb) 113 1,150 kg (2,540 lb) 133 2,065 kg (4,553 lb)
74 375 kg (827 lb) 94 670 kg (1,480 lb) 114 1,180 kg (2,600 lb) 134 2,125 kg (4,685 lb)
75 387 kg (853 lb) 95 690 kg (1,520 lb) 115 1,215 kg (2,679 lb) 135 2,185 kg (4,817 lb)
76 400 kg (880 lb) 96 710 kg (1,570 lb) 116 1,250 kg (2,760 lb) 136 2,245 kg (4,949 lb)
77 412 kg (908 lb) 97 730 kg (1,610 lb) 117 1,285 kg (2,833 lb) 137 2,305 kg (5,082 lb)
78 425 kg (937 lb) 98 750 kg (1,650 lb) 118 1,320 kg (2,910 lb) 138 2,365 kg (5,214 lb)
79 437 kg (963 lb) 99 775 kg (1,709 lb) 119 1,360 kg (3,000 lb) 139 2,435 kg (5,368 lb)

Some of the older letter-code load-range ratings for Light Truck Tires can be found in a chart published by the Goodyear Tire & Rubber Company. For example:

Tire size Weight (lb) @lb/in2 Weight (lb) @lb/in2
LR Code D E
LT215/85R16 2335 @65 2680 @80
LT225/75R16 2335 @65 2680 @80
LT235/85R16 2623 @65 3042 @80
LT245/75R16 2623 @65 3042 @80
Speed rating

The speed symbol is made up of a single letter or an A with one number. It indicates the maximum speed at which the tire can carry a load corresponding to its Load Index. The testing method consists of pressing the tire against a large diameter metal drum to reflect its appropriate load, and run at ever increasing speeds in 10 km/h (6.2 mph) steps in 10 minute increments until the tire’s required speed has been met.

Speed rating
Code km/h mph Code km/h mph
A1 5 3 L 120 75
A2 10 6 M 130 81
A3 15 9 N 140 87
A4 20 12 P 150 94
A5 25 16 Q 160 100
A6 30 19 R 170 106
A7 35 22 S 180 112
A8 40 25 T 190 118
B 50 31 U 200 124
C 60 37 H 210 130
D 65 40 V 240 149
E 70 43 Z over 240 over 149
F 80 50 W 270 168
G 90 56 (W) over 270 over 168
J 100 62 Y 300 186
K 110 68 (Y) over 300 over 186

Prior to 1991, tire speed ratings were shown inside the tire size, before the “R” construction type. The available codes were SR (180 km/h, 112 mph), HR (210 km/h, 130 mph), VR (in excess of 210 km/h, 130 mph).

Tires with a speed rating higher than 300 km/h (186 mph) are indicated by a Y in parentheses. The load rating is often included within the parentheses, e.g. (86Y).

In many countries, the law requires that tires must be specified, and fitted, to exceed the maximum speed of the vehicle they are mounted on, with regards to their speed rating code (except for “temporary-use” spare tires). In some parts of the European Union, tires that are not fit for a car’s or motorcycle’s particular maximum speed are illegal to mount. The sole exception are M+S tires, where a warning sticker stating the allowed maximum speed must be placed within clear sight of the driver inside the vehicle. Some manufacturers will install a speed governor if a vehicle is ordered with tires rated below the vehicle’s maximum speed. In some parts of the European Union, e.g. Germany, it is allowed to mount tires with a lower speed rating code if the car manufacturer specifies tires with a very high speed rating in the registration documents and the vehicle will not reach this speed based on insufficient power. In this case it is possible to calculate the appropriate speed rating with a formula.

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