Get An Oil Change
Your Nearest Store:
7980 S Broadway
Littleton, CO
303.515.7308
Most stores are open nights and weekends
| Day(s) | Hours |
|---|---|
| MON-SAT: | 7:00am-6:00pm |
| SUN: | 9:00am-5:00pm |
Schedule Service
Your Nearest Store:
7980 S Broadway
Littleton, CO
303.515.7308
Most stores are open nights and weekends
| Day(s) | Hours |
|---|---|
| MON-SAT: | 7:00am-6:00pm |
| SUN: | 9:00am-5:00pm |
Search For Batteries
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Alignment Service
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Understanding Tire Size
Learn how to read tire size and choose the right set for your vehicle.
Shop Tires by Size
Tire size explained
Tires come in a variety of inner diameters, ranging from 13" to 22". The tire size you need will depend on the make and model of your vehicle. Tire size must match rim size and may impact ideal inflation pressure, so knowing the size of your tires is an important part of taking good care of your vehicle.
Shop by tire size
Once you know your car's rim diameter, browse tires by size to find the right tire, at the right price. Then, visit one of our expert technicians at your local Firestone Complete Auto Care. You can trust our tire specialists to mount, and balance your new tires. Our tire experts can also offer tire advice if you are considering buying new wheels (rims) or curious about changing the outer diameter of your tires. After all, we've put more tires on more cars than any other company!
How to read tire size
If you’re in the market for new tires, the first step is to check the size of your current tires. (A sticker in the driver’s door jamb should also tell you the tire sizes recommended for your car.) Simply check the sidewalls of your tires for a series of numbers and symbols that should look like this: P215/60 R17. The wheel diameter will be the last number in the series. In this example, the vehicle's rim diameter is 17".
The other numbers and symbols refer to the tire type, tire width measured in millimeters from sidewall to sidewall, aspect ratio, and tire construction type. The rim size (aka rim diameter) is the most important number to pay attention to when you’re shopping for tires that will fit your vehicle properly.
Again, if you don’t have existing tires to refer to, you can find your vehicle's recommended tire size by checking the vehicle's tire information placard on the inside of the driver's side door or your owner’s manual.
