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Buy 3 Tires, Get the 4th Free Plus 10% Off tires. Enter Promo Code SPEED10. SHOP TIRES.

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Green Means Go: Buy 3 Tires, Get the 4th Free Plus 10% Off tires
Receive 10% off select tires when scheduled for installation on PepBoys.com and installation is completed between 4/14/14 through 4/26/14 Use promotional code SPEED10 at checkout to receive discount OR click here to print this in store coupon and present at time of installation. Cannot be combined with any other offer, coupon or rebate. Valid on select in stock tires only, those tires for which discount is available will be identified in search results, all other tires and special order tires are excluded from this offer. Requires purchase of road hazard warranty and tire installation package which includes valve stems or TPMS reseal kit and balancing.

Free Shipping orders over $75
Free Ground Shipping on Ship to Address orders over $75. No code needed. Offer only valid on in-stock merchandise valued at a total of $75, after any discounts have been applied, and before any core charges, shipping charges, fees and taxes have been added. Certain items exceeding weight and size limitations are excluded. See item descriptions for details.

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.

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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