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Does the new tire's load index and speed rating measure up?

The number and letter after a tire size, like the 94V in 225/45R17 94V, are its load index and speed rating. Enter the ones on your current tire and on the tire you're looking at to see the load each carries, per tire and for all four, and whether the new one meets or exceeds the old. Start from what your vehicle maker specifies on the door placard.

The tool

Try it

Load index & speed rating check

Compare the numbers on your current tire with the one you're looking at.

Your current tire

The number and letter after the size, such as 94V or 121/118S.

Tire you're considering

The number and letter after the size, such as 94V or 121/118S.

Below your current tire on load index and speed rating. Not recommended by tire makers. Load index 91 carries up to 1,356 lb (615 kg) per tire, 121 lb less per tire than your current 94. H is tested to 130 mph, below your current V (149 mph). Replacement tires should match or exceed the load index and speed rating your vehicle maker specifies.

Below your current tire on load index and speed rating. Not recommended by tire makers.

Replacement tires should match or exceed the load index and speed rating your vehicle maker specifies.

Load

Below your current tire. Not recommended by tire makers

Load index 91 carries up to 1,356 lb (615 kg) per tire, 121 lb less per tire than your current 94.

Speed

Below your current tire. Not recommended by tire makers

H is tested to 130 mph, below your current V (149 mph).

Current tire and considered tire, side by side
CurrentConsidering
Load index9491
Max load per tire1,477 lb (670 kg)1,356 lb (615 kg)
Set of four (×4)5,908 lb (2,680 kg)5,423 lb (2,460 kg)
Speed ratingV, 149 mph (240 km/h)H, 130 mph (210 km/h)

The ×4 figure is four tires' combined maximum. What your vehicle is rated to carry is on its door placard.

A speed rating is the speed a tire was tested to carry its load. It is not a recommended driving speed.

  • SL (standard load) is the default when a tire shows no load marking.
  • XL (extra load) and LT tires carry more at higher pressures, per the tire maker's load and inflation tables. We confirm fitment on every order.
  • LT tires often show two load indexes, such as 121/118. The second is for pairs on dual rear wheels; the first is the one compared here.
  • Start from the load index and speed rating your vehicle maker specifies, on the door placard or in the owner's manual. The tires on the car now may not match it.
Full load index and speed rating tables
Load index, maximum load per tire
Indexlbkg
60551250
61567257
62584265
63600272
64617280
65639290
66661300
67677307
68694315
69717325
70739335
71761345
72783355
73805365
74827375
75853387
76882400
77908412
78937425
79963437
80992450
811,019462
821,047475
831,074487
841,102500
851,135515
861,168530
871,202545
881,235560
891,279580
901,323600
911,356615
921,389630
931,433650
941,477670
951,521690
961,565710
971,609730
981,653750
991,709775
1001,764800
1011,819825
1021,874850
1031,929875
1041,984900
1052,039925
1062,094950
1072,150975
1082,2051,000
1092,2711,030
1102,3371,060
1112,4031,090
1122,4691,120
1132,5351,150
1142,6011,180
1152,6791,215
1162,7561,250
1172,8331,285
1182,9101,320
1192,9981,360
1203,0861,400
1213,1971,450
1223,3071,500
1233,4171,550
1243,5271,600
1253,6381,650
1263,7481,700
Speed rating, lab test speed
Ratingmphkm/h
L75120
M81130
N87140
P93150
Q99160
R106170
S112180
T118190
U124200
H130210
V149240
W168270
Y186300

Standard figures published by Michelin and Goodyear. Pounds are converted from kilograms and rounded.

Sources: Michelin, Load Rating & Speed Rating (opens in a new tab); Goodyear, Tire Load Index (opens in a new tab)

Text version of this demo

Compares a current tire's load index and speed rating with a replacement's, showing the load per tire and for four in pounds and kilograms, and whether the replacement meets or exceeds the current tire. A speed rating is the speed a tire was tested to carry its load, not a recommended driving speed.

Step by step

How to use it

  1. Find the load index and speed rating on your current tire's sidewall: the number and letter right after the size, such as 94V. The door placard or owner's manual lists what your vehicle maker specifies.
  2. Type it into “Your current tire”, or pick the load index and speed rating from the lists.
  3. Do the same for the tire you're considering.
  4. Read load and speed separately. A tire below your current one on either isn't a like-for-like replacement.

Questions

The things people ask next

Can I use a tire with a lower load index?

Replacement tires should match or exceed the load index your vehicle maker specifies. USTMA says never to go lower. A lower index means each tire is rated to carry less weight at its proper pressure.

Is the speed rating a speed I can drive at?

No. A speed rating is the speed a tire was tested to carry its load under lab conditions, not a recommended driving speed. Match or exceed the rating your vehicle maker calls for, and drive to the posted limit and the conditions.

What does XL after the load index mean?

XL marks an extra-load version of the size. It carries more than a standard-load tire of the same size, at the higher pressures in the tire maker's load and inflation tables. A tire with no load marking is standard load (SL).

Why does an LT tire show two load indexes?

An LT marking such as 121/118 gives two figures. The first is for a single tire, and the second is for pairs on dual rear wheels. Compare the first one.

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