315/40R21 Tires
Check out our selection
315/40R21 Tires
Check out our selection
Deals & Discounts
Treadlife/Mileage
Road Hazard Warranty
Brand
Model
Season
Tire Type
Size
Load Index
Speed Rating
Vehicle Type
Run Flat
3PMSF
Load Range
Sidewall
315/40R21 Tires
315
This number represents the tire’s width in millimeters, measured from one shoulder to the other. In this case, the tire’s width is 315 mm (12.4 inches).
40
The aspect ratio is expressed as a percentage of the tire’s height to its width. A 40-aspect ratio means that the tire’s height is 40% of its width (in this case it is 126 mm / 4.96 inches).
R
This indicates that the tire was manufactured with a radial construction, which is the most common tire construction type used today.
21
This last number denotes the diameter of the wheel in inches. This tire was manufactured to be mounted on 21-inch (533.4 mm) wheels.
Factors to Consider When Choosing 315/40R21 Tires:
Apart from the tire size, drivers must consider multiple other factors as well, before deciding which tires to purchase. Here are some things to look into:
Vehicle Compatibility:
Check the owner’s manual for the tire size suitable for your vehicle, as 315/40R21 tires might not work for it.
Tire Type:
After deciding on the tire size, figure out whether you need snow tires or all season tires (maybe even summer tires) for your specific application.
Tread Pattern:
315/40R21 tires feature a specially designed tread patterns. This enables the tire’s performance in versatile weather conditions.
Budget:
Create a reasonable budget and stick with it. This will narrow down your options, while also preventing you from overspending.
Brand and Quality:
Research the tires you are interested in before finalizing your purchase. Get the quality tires that work best for your vehicle.
Load and Speed Rating:
Find suitable tire load and speed ratings for your vehicle. If they do not match your vehicle, they will not work for you.
Tire Maintenance
Consistent tire maintenance helps lengthen the usability and durability of each 315/40R21 tire. Make sure to check your tires regularly.
Conclusion
For a popular but diverse fit, 315/40R21 tires are ideal. They can be used on various vehicles, depending on their load and speed ranges. Yet, 315/40R21 tires are still able to offer the necessary traction, handling, and durability in different applications. Make sure these tires are the right fit for your vehicle’s needs, driving habits, and weather or road conditions, and they will serve you for a long time.