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315-40r21 tires

LX-Twenty

Performance tires are designed for use on sports cars and performance-oriented vehicles. These tires are usually at their best in above freezing temperatures, and offer drivers responsive handling, improved acceleration, and strong braking capabilities.

Passenger tires are some of the most common tires you'll find on the roads today, and frequently used on coupes, sedans, hatchbacks, minivans, and other passenger vehicles. Passenger tires are available in a wide variety of types, such as all-season, winter, and ultra-high-performance.

This product is covered by a 55,000 mile manufacturer’s treadlife warranty. Merchandise covered by a manufacturer’s warranty is sold with the warranty by the 
        manufacturer extended to the purchaser. We will be happy to assist in obtaining fulfillment of a manufacturer’s 
        warranty. Other than applicable manufacturers’ warranties, there are no warranties, express or implied, 
        including any warranty of merchantability or fitness for a particular purpose. The only tires SimpleTire can 
        warranty are brand new defects (meaning that they have not been mounted or driven on). Any bead damaged will be 
        void of any warranty claim. Any other adjustments should be taken to the nearest authorized dealer for that 
        manufacturer. Sometimes the manufacturer also provides a treadlife warranty and mileage rating. Please be aware 
        that not all tires hold a mileage warranty from the manufacturer. Different tire models, even from the same 
        manufacturer, may or may not come with a treadlife warranty.

Mileage Warranty

The maximum carrying capacity for a tire determined by the manufacturer.

Load Index

Maximum speed capability to safely carry a load for an extended period of time.

Max Speed

The maximum load carrying strength at the specified inflation pressure, also known as ply rating.

The side of the tire between the tread and rim, with cosmetic branding as well as information about the tire including manufacturer, model, size, etc.

Sidewall

Standards that measure treadwear, temperature resistance and traction, example: "640 A A".  The 640 is the treadwear test and it lasted 6.4 times longer than the comparison tire tested against.  The first "A" is the traction rating using straight-line wet traction on test surfaces (see information tables tab) and the second "A" is the temperature rating by testing operation at high speeds without heat-related failure (see information tables tab).

UTQG

Wet Traction is a piece of the UTQG for example if  UTQG is: 500 AA A, the wet traction piece is the second piece, the "AA".

Wet Traction

Measured in 32nds of an inch, this metric shows how much tread life is left on a tire, with the tire's traction & stopping capabilities greatly diminished at 4/32nds and less. Tire manufacturers include "tire wear bars" at 2/32nds to indicate when your tire is worn out.

Tread Depth

The highest inflation pressure (measured in pounds of force per square inch, PSI) the tire is designed to contain, and should only be used when called for by the vehicle placard.

Inflation Pressure

An identifier of a particular tire line and size combination assigned by the tire manufacturer.

Part Number

Tread design (or tread pattern) can affect handling, traction & noise for different driving styles & road conditions.

Tread Design

Tire Weight

The measurement of width from a tires inner sidewall to the outer sidewall.

Section Width

The range of widths the rim of the vehicle can be for this tire to be safely mounted on.

Rim Range

The diameter of a tire that is inflated without any load applied.

Overall Diameter

P Zero (PZ5)

This product is not covered by a manufacturer’s treadlife warranty.

Sport AS

Like  their name suggest, all season tires are designed to give drivers performance year-round. All-season tires often provide strong performance in dry and wet conditions, and suitable traction and grip in wintery weather.

This product is covered by a 40,000 mile manufacturer’s treadlife warranty. Merchandise covered by a manufacturer’s warranty is sold with the warranty by the 
        manufacturer extended to the purchaser. We will be happy to assist in obtaining fulfillment of a manufacturer’s 
        warranty. Other than applicable manufacturers’ warranties, there are no warranties, express or implied, 
        including any warranty of merchantability or fitness for a particular purpose. The only tires SimpleTire can 
        warranty are brand new defects (meaning that they have not been mounted or driven on). Any bead damaged will be 
        void of any warranty claim. Any other adjustments should be taken to the nearest authorized dealer for that 
        manufacturer. Sometimes the manufacturer also provides a treadlife warranty and mileage rating. Please be aware 
        that not all tires hold a mileage warranty from the manufacturer. Different tire models, even from the same 
        manufacturer, may or may not come with a treadlife warranty.

27 tires available in 315-40r21

In Size 315-40r21

**Most drivers choose from our top picks**<br />They include the best matches 
                     of this tire size based on popularity, user ratings, and price.

We'll start with our 5 top picks

With similar, but improved specs to the factory tire

Best match:

Best match to original tire

Scorpion Zero All Season

SUV/Crossover tires are designed for use on SUVs and CUVs and provide many of the same performance characteristics as passenger tires but are built to handle the heavier weight that's common from these larger vehicles.

Based on verified customer reviews, this tire has been highly rated.

Top rated:

Best customer reviewed tire.

Save on this  tire today.

Best deal:

Save even more.

SportContact 6

Summer tires are designed for use in warmer weather or in areas where the temperatures does not drop below 40 degrees. These tires are ideal for ue in warm, dry, and wet conditions that are common in the summertime.

Consistently rated as excellent by experts with the highest SimpleScore among the top 5 tires.

Top SimpleScore&trade;:

Chosen by our tire experts.

Alenza Sport A/S

Ultra-high-performance all-season tires provide sporty traction and handling plus quick acceleration and braking in dry, wet, and light winter weather.

Most popular among drivers in PA

Best seller:

Go with the best seller

Agility SUV

This product is covered by a 60,000 mile manufacturer’s treadlife warranty. Merchandise covered by a manufacturer’s warranty is sold with the warranty by the 
        manufacturer extended to the purchaser. We will be happy to assist in obtaining fulfillment of a manufacturer’s 
        warranty. Other than applicable manufacturers’ warranties, there are no warranties, express or implied, 
        including any warranty of merchantability or fitness for a particular purpose. The only tires SimpleTire can 
        warranty are brand new defects (meaning that they have not been mounted or driven on). Any bead damaged will be 
        void of any warranty claim. Any other adjustments should be taken to the nearest authorized dealer for that 
        manufacturer. Sometimes the manufacturer also provides a treadlife warranty and mileage rating. Please be aware 
        that not all tires hold a mileage warranty from the manufacturer. Different tire models, even from the same 
        manufacturer, may or may not come with a treadlife warranty.

Filter By

315/40R21 performance Tires

Featured

All

Vehicle

Category

Price Range

Lexani LX-Twenty
111(Y) | In stock

Category
Performance
Vehicle
Passenger
Mileage Warranty
55k

Join the SimpleCrew and get exclusive perks.

Pirelli P Zero (PZ5)
111Y | In stock

Category
Performance
Vehicle
Passenger
Mileage Warranty
N/A

Load Index
2403 lbs (111)
Max Speed
186 MPH (Y)
Sidewall
Blackwall
UTQG
280AAA
Wet Traction
AA
Tread Depth
10/32nds
Inflation Pressure
51 PSI
Part Number
4261900
Tire Weight
37 lbs
Section Width
12.6"
Rim Range
10.50-12.50"
Overall Diameter
30.91"

American Roadstar Sport AS
111Y | In stock

Category
All Season
Vehicle
Passenger
Mileage Warranty
40k

Load Index
2403 lbs (111)
Max Speed
186 MPH (Y)
Load Range
Standard (SL)
Sidewall
Blackwall
UTQG
500AA
Wet Traction
A
Tread Depth
10/32nds
Inflation Pressure
44 PSI
Part Number
ARSS122
Tread Design
Asymmetrical
Tire Weight
42 lbs
Section Width
12.6"
Overall Diameter
30.91"

Did you find what
you were looking for?

Filter By

315/40R21 performance Tires

Lexani LX-Twenty 111(Y) | In stock

CategoryPerformanceVehiclePassengerMileage Warranty55k

Load Index2403 lbs (111)Max Speed186 MPH ((Y))Load RangeStandard (SL)SidewallBlackwallUTQG320AAWet TractionATread Depth10/32ndsInflation Pressure44 PSIPart NumberLXST202140050Tread DesignAsymmetricalTire Weight38.37 lbsSection Width12.6"Rim Range10.50-11.50"Overall Diameter30.91"

Join the SimpleCrew and get exclusive perks.

Pirelli P Zero (PZ5) 111Y | In stock

CategoryPerformanceVehiclePassengerMileage WarrantyN/A

Load Index2403 lbs (111)Max Speed186 MPH (Y)SidewallBlackwallUTQG280AAAWet TractionAATread Depth10/32ndsInflation Pressure51 PSIPart Number4261900Tire Weight37 lbsSection Width12.6"Rim Range10.50-12.50"Overall Diameter30.91"

American Roadstar Sport AS 111Y | In stock

CategoryAll SeasonVehiclePassengerMileage Warranty40k

Load Index2403 lbs (111)Max Speed186 MPH (Y)Load RangeStandard (SL)SidewallBlackwallUTQG500AAWet TractionATread Depth10/32ndsInflation Pressure44 PSIPart NumberARSS122Tread DesignAsymmetricalTire Weight42 lbsSection Width12.6"Overall Diameter30.91"

Did you find what you were looking for?