Tire Size Chart

How to Find Your Tire Size: The three best places to find your tire sizes are

  1. Your tire itself, located on the sidewall.
  2. The tire placard inside your driver side door.
  3. Your vehicle’s owner manual.

How to Read a Tire Size: refer to the picture detailing what each number/letter means. The same sequence of numbers/letters should be visible on every tire.

Different Types of Tire Sizes: There are two common tire size types. The most common is metric 215/70R15. The other type is floatation that will look like 35×12.50R20.

how to read a tire

Tire Sizes, Overall Diameter and Width

*TIRE SIZES ARE ORGANIZED BY WHEEL DIAMETER

**Please note that sizes are not exact for every manufacturer. Also note that tire sizes with different ply ratings (12, LT/10, 8, 6, XL, SL/4) can have slightly different measurements because of rubber thickness.

Tire Speed Rating Chart

A tire’s speed rating is located at the end of the tire size code (205/55R16 91– V is the speed rating). This letter represents the maximum speed the tire is certified to carry under the load it is rated for, while properly inflated and under ideal driving conditions.

It is important to choose tires with a speed rating that meets or exceeds your vehicle’s OEM (original equipment manufacturer) specifications. 

Upgrading to a higher speed rated tire might improve performance, however, the rest of the vehicle’s components (brakes, suspension, etc.) must also be capable.

Speed RatingMaximum SpeedSpeed RatingMaximum Speed
BUp to 31 MPH PUp to 93 MPH
CUp to 37 MPH QUp to 100 MPH
DUp to 40 MPH RUp to 106 MPH
EUp to 43 MPH SUp to 112 MPH
FUp to 50 MPH TUp to 118 MPH
GUp to 56 MPH UUp to 124 MPH
JUp to 62 MPH HUp to 130 MPH
KUp to 68 MPH VUp to 149 MPH
LUp to 75 MPH WUp to 168 MPH
MUp to 81 MPH YUp to 186 MPH
NUp to 87 MPH Z149 MPH and Over
Speed RatingMaximum Speed
BUp to 31 MPH
CUp to 37 MPH
DUp to 40 MPH
EUp to 43 MPH
FUp to 50 MPH
GUp to 56 MPH
JUp to 62 MPH
KUp to 68 MPH
LUp to 75 MPH
MUp to 81 MPH
NUp to 87 MPH
PUp to 94 MPH
QUp to 100 MPH
RUp to 106 MPH
SUp to 112 MPH
TUp to 118 MPH
UUp to 124 MPH
HUp to 130 MPH
VUp to 149 MPH
WUp to 168 MPH
YUp to 186 MPH
Z149 MPH and Over

Tire Load Index Chart

A tire’s load index is located at the end of the tire size code (205/55R16 91V – 91 is the load index). This number represents the maximum load (weight) a single tire is certified to carry when inflated to its maximum rated pressure, under ideal driving conditions.

It is important to choose tires with a load index that meets or exceeds your vehicle’s OEM (original equipment manufacturer) specifications. If you install a tire with a lower load index than recommended by the vehicle manufacturer, you risk under-loading the tire’s capacity — which may lead to premature wear or failure, especially under heavy loads or high speeds.

Matching or exceeding the required load index is especially important for vehicles carrying heavy cargo or towing.

Load IndexLoad Capacity (lbs)Load IndexLoad Capacity (lbs)Load IndexLoad Capacity (lbs)
70739 1001764 1304189
71761 1011819 1314289
72783 1021874 1324409
73805 1031929 1334541
74827 1041984 1344674
75852 1052039 1354806
76882 1062094 1364938
77908 1072149 1375071
78937 1082205 1385203
79963 1092271 1395357
80992 1102337 1405512
811019 1112403 1415677
821047 1122469 1425842
831074 1132535 1436008
841102 1142601 1446173
851135 1152679 1456393
861168 1162756 1466614
871201 1172833 1476779
881235 1182910 1486844
891279 1192998 1497165
901323 1203086 1507385
911356 1213197
921389 1223307
931433 1233417
941477 1243527
951521 1253638
961565 1263748
971609 1273858
981653 1283968
991709 1294079
Load IndexLoad Capacity (lbs)
70739
71761
72783
73805
74827
75852
76882
77908
78937
79963
80992
811019
821047
831074
841102
851135
861168
871201
881235
891279
901323
911356
921389
931433
941477
951521
961565
971609
981653
991709
1001764
1011819
1021874
1031929
1041984
1052039
1062094
1072149
1082205
1092271
1102337
1112403
1122469
1132535
1142601
1152679
1162756
1172833
1182910
1192998
1203086
1213197
1223307
1233417
1243527
1253638
1263748
1273858
1283968
1294079
1304189
1314289
1324409
1334541
1344674
1354806
1364938
1375071
1385203
1395357
1405512
1415677
1425842
1436008
1446173
1456393
1466614
1476779
1486844
1497165
1507385

Trailer Tire Sizes

*TIRE SIZES ARE ORGANIZED BY WHEEL DIAMETER

*Please note that are not exact for every manufacturer. Also note that tire sizes with different ply ratings (12, LT/10, 8, 6, XL, SL/4) can have slightly different measurements because of rubber thickness.

Commercial Tire Sizes

*TIRE SIZES ARE ORGANIZED BY WHEEL DIAMETER

*Please note that are not exact for every manufacturer. Also note that tire sizes with different ply ratings (12, LT/10, 8, 6, XL, SL/4) can have slightly different measurements because of rubber thickness.