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255-40r21 tires

SP Sport Maxx GT

Ultra High Performance (or UHP) tires have a speed rating of V or greater and are used on sports cars, super cars, and other powerful vehicles. Commonly featuring a wide footprint and low profile, UHP tires provide excellent traction and steering response but should not be used when temperatures are at 40 degrees or below.

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 not covered by a manufacturer’s 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

Sport Maxx RT2

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.

48 tires available in 255-40r21

In Size 255-40r21

**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

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

Top SimpleScore&trade;:

Chosen by our tire experts.

ContiSportContact 5

This tire features run flat technology that’s designed to assist the driver during a puncture of pressure loss.

Run Flat

Self-sealing denotes the tire has a material in it that sticks to an object that punctured the tire. The material then seals the hole after the object is removed from the tire.

Self Sealing

Save on this  tire today.

Best deal:

Save even more.

ContiSportContact 5P

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

Top rated:

Best customer reviewed tire.

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.

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.

With similar, but improved specs to the factory tire

Best match:

Best match to original tire

LH-Five

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

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255/40R21 dunlop Tires

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Dunlop SP Sport Maxx GT
255/40R21 102Y XL | In stock

Category
UHP
Vehicle
Passenger
Mileage Warranty
N/A

Load Index
1874 lbs (102)
Max Speed
186 MPH (Y)
Load Range
Extra (XL)
Sidewall
Blackwall
UTQG
240AAA
Wet Traction
AA
Tread Depth
9/32nds
Inflation Pressure
50 PSI
Part Number
265023856
Tread Design
Asymmetrical
Tire Weight
31.03 lbs
Section Width
10.24"
Rim Range
8.50-10.00"
Overall Diameter
29.02"

Join the SimpleCrew and get exclusive perks.

Dunlop Sport Maxx RT2
255/40ZR21 102Y XL | In stock

Category
Summer
Vehicle
Passenger
Mileage Warranty
N/A

Load Index
1874 lbs (102)
Max Speed
186 MPH (Y)
Load Range
Extra (XL)
Sidewall
Blackwall
UTQG
300AAA
Wet Traction
AA
Tread Depth
9/32nds
Inflation Pressure
50 PSI
Part Number
265008006
Tread Design
Symmetrical
Tire Weight
37.47 lbs
Section Width
10.24"
Rim Range
8.50-10.00"
Overall Diameter
29.02"

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255/40R21 dunlop Tires

Dunlop SP Sport Maxx GT255/40R21 102Y XL | In stock

CategoryUHPVehiclePassengerMileage WarrantyN/A

Load Index1874 lbs (102)Max Speed186 MPH (Y)Load RangeExtra (XL)SidewallBlackwallUTQG240AAAWet TractionAATread Depth9/32ndsInflation Pressure50 PSIPart Number265023856Tread DesignAsymmetricalTire Weight31.03 lbsSection Width10.24"Rim Range8.50-10.00"Overall Diameter29.02"

Join the SimpleCrew and get exclusive perks.

Dunlop Sport Maxx RT2255/40ZR21 102Y XL | In stock

CategorySummerVehiclePassengerMileage WarrantyN/A

Load Index1874 lbs (102)Max Speed186 MPH (Y)Load RangeExtra (XL)SidewallBlackwallUTQG300AAAWet TractionAATread Depth9/32ndsInflation Pressure50 PSIPart Number265008006Tread DesignSymmetricalTire Weight37.47 lbsSection Width10.24"Rim Range8.50-10.00"Overall Diameter29.02"