How to read metric sizes

  • Tire Class :

    Tire tire class of this tire size is 'P' which means it is a passenger car tire. The first letter in the tire size designates the tire class. An 'LT' would be a light truck class and no letter would be a euro-metric tire.

  • Section Width :

    The width of this tire size is 255mm wide. The first number in a metric tire size is the section width of the tire.

  • Aspect Ratio :

    The aspect ratio on this tire size is 60. The second number in a metric tire size is called the aspect ratio and means that the sidewall height is 60% of the section width.

  • Tire Construction :

    The tire construction of this tire size is R for radial. This letter is for how the tire is constructed. Radial is the standard construction method for almost all tires.

  • Wheel Diameter :

    The wheel diameter of this tire size is 17 inches. The tire is designed to be mounted on an 17" wheel diameter.

  • Load Index :

    The load index of this tire is 102 - 1874 lbs. This number is the load index and the maximum amount of weight the tire can carry. A higher number means the tire can carry more weight.

  • Speed Rating :

    The speed rating of this tire size is V - 149 mph. This letter is the speed rating of the tire and indicates the maximum speed the tire can sustain.


Load Ratings

Load Index Max lbs. Load Index Max lbs.
71761861168
72783871201
73805881235
74827891279
75852901323
76882911356
77908921389
78937931433
79963941477
80992951521
811019961565
821047971609
831074981653
841102991709
8511351001764
Load Index Max lbs. Load Index Max lbs.
10118191162756
10218741172833
10319291182910
10419841192998
10520391203086
10620941213197
10721491223307
10822051233417
10922711243527
11023371253638
11124031263748
11224691273858
11325351283968
11426011294079
11526791304189

LT Load Ranges

Load RangePly RatingMax Load Pressure
B435 psi
C650 psi
D865 psi
E1080 psi
F1295 psi

Passenger Load Ranges

Load RangeSymbolMax Load Pressure
Light LoadLL35 psi
Standard LoadSL35/44 psi
Extra LoadXL41/50 psi

Speed Ratings

LetterMax
Speed
Vehicle Types
L75 mph / 120 km/hOff-Road Tires
M81 mph / 130 km/hTemporary Spares
N87 mph / 140km/hWinter Tires
P93 mph / 150 km/hWinter Tires
Q99 mph / 160 km/hLight Truck Tires
R106 mph / 170 km/hLight Truck Tires
S112 mph / 180 km/hLight Truck Tires
T118 mph / 190 km/hSedans
U124 mph / 200 km/hSedans
H130 mph / 210 km/hSports Cars
V149 mph / 240 km/hSports Cars
W168 mph / 270 km/hSuper Sports Cars
Y186 mph / 300 km/hSuper Sports Cars