On the side of a tire under the brand name, you'll find every piece of information you need to know about the tire. The size, make, model, load index and speed rating can be found in a series of numbers on the sidewall of your tires.
P means that the tire is designed for a Passenger car. LT means
Light Trucks. If you choose to use a P rated tire on a vehicle
that originally took a LT, the maximum load carrying capacity
of the tire should be reduced by 9%.
the width in millimeters of the tire from sidewall to sidewall
when it's unstressed and you're looking at it head on (or top-down).
the height of the tire sidewall, or section height, expressed
as a percentage of the width. It is known as the aspect ratio.
you that the tire is a radial construction. Most of today's tires
are radials, but occasionally you may see a D or a B on the tire
indicating that the tire is a bias ply tire. Never mix radial
and bias ply tires on a vehicle.
the diameter in inches of the rim of the wheel on which the tire
has been designed to fit.
This indicates the tire's load index as established by the Rubber Manufacturers Association. The load index can range from 0 to 279 and indicates how much weight the tire is certified to carry at maximum inflation pressure.
Make sure that the tire you replace has the same carrying capacity as the one you are taking off. You can do this by using a tire with the same load index, or by checking the maximum load capacity of the tire which is printed in fairly small print near the wheel. On trucks you often won't see this designation in which case you should look for a Load Range such as C, D, E, or F.
Maximum Load (lbs)
All tires are rated with a speed letter. This indicates the maximum speed that the tire can sustain for a ten minute endurance drive without falling to pieces. We do not recommend using a tire with a speed rating lower than that which the vehicle manufacturer recommends for your car, or mixing tires with different speed ratings on any vehicle.
Max. Speed Capability
513 771 4273
Major Tire Company
518 Glendale-Milford Road
Cincinnati, OH 45215
Monday - Friday: 8 am - 5 pm
Saturday: 8 am - 3 pm