See Details

Buy 3 Tires, Get 4th Tire Free Instantly

Close (X)

Buy 3 Tires, Get 4th Tire Free Instantly
Buy 3 Tires, Get 4th Tire Free Instantly. Receive a discount equal to the price of a single tire when four tires are added to the cart. Valid on select in stock tires only. Those tires for which discount is available will be identified in search results & product detail pages. All other tires and special order tires are excluded from this offer. Valid when scheduled for installation on and installation is completed between 11/28/17 through 12/31/17.

Safety Ratings For Cars: Speed Rating & Load Index

There’s always more to learn at Pep Boys. Here’s the word on more of the words and symbols written on your tires.


Speed Ratings
Every tire is designed to withstand a specific level of speed over an extended period of time – think in terms of highway driving for example. The longer you drive at a certain speed, the more heat a tire will generate from the friction of that tire churning against the road surface and the side wall flexing.

A tire’s speed rating indicates the ability of that tire to handle a certain level of prolonged speed – and the heat it produces – without suffering deterioration in performance.

All tires in the in the U.S. are designed to maintain legal U.S. speed limits. A tire’s speed rating must match the maximum driving speed of the vehicle it’s mounted on. However, simply installing a tire rated for a designated speed does not mean the vehicle it’s mounted on can be driven safely at the tire’s highest performance level.

Make an Appointment

Below is a list of ratings coordinated with the speeds they represent. Note: These are not recommended speeds.

RatingMaximum SpeedTypical Application
L75 mph | 120 km/hOff-Road & Light Truck Tires
M81 mph | 130 km/h
N87 mph | 140 km/hTemporary Spare Tires
P93 mpg | 150 km/h
Q99 mph | 160 km/hStudless & Studdable Winter Tires
R106 mph | 170 km/hH.D. Light Truck Tires
S112 mph | 180 km/hFamily Sedans & Vans
T118 mph | 190 km/hFamily Sedans & Vans
U124 mph | 200 km/h
H130 mph | 210 km/hSports Sedans & Coupes
V149 mph | 240 km/hSports Sedans, Coupes & Sports Cars
Z> 149 mph, 240 km/h
W (Z)168 mph | 270 km/hExotic Sports Cars
Y (Z)186 mph | 300 km/hExotic Sports Cars

Load Index
The load index is a numerical identifier assigned to each tire based on the ability of that tire’s size to withstand a certain load level of speed without deterioration in performance. The higher the load index value, the greater the load the tire can safely carry at the correct inflation.

Note: Pep Boys will only install tires that meet or exceed the original equipment manufacturers specifications for specific rating and load index.

For example:

  • 96 = 1,565 pounds
  • 97 = 1,609 pounds
  • 98 = 1,653 pounds
  • 99 = 1,709 pounds