Speed Rating

Quick facts on tire quickness.

Speed rating is a handy system to indicate the range of speeds your tire is certified to safely handle under specific service conditions. This rating is indicated by a letter, A-Y, tacked onto the end of the tire’s service description, as seen here:

205/60R15 91V
205 = Section Width in Millimeters
60 = Aspect Ratio
R = Radial Construction
15 = Rim Diameter in Inches
91 = Load Index	(Service Description)
V = Speed Symbol

Check out this chart to see the top speeds that correspond with each letter.

When tires have a maximum speed capability above 149 mph (240 km/h), a “ZR” may appear in the service description and if it can handle over 186 mph (300 km/h), it must. Here is an example:

EXAMPLES
Tire Designation	Maximum Speed
P275/40ZR17 93W	270 km/h (168 mph)
P275/40ZR17 93Y	300 km/h (186 mph)

If you want more info on speed ratings and what they mean to you, contact us. We’ll catch you up.