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Bridgestone Potenza Sport 345/30ZR21 XL Potenza Sport L
Bridgestone

Potenza Sport

345/30ZR21 XL
Summer
🏷️ Manufacturer rebate available: Bridgestone Get $80 Back
$527.99/tire $703.99
Set of 4: $2111.96
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
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Specifications

Size345/30ZR21 XL Potenza Sport L
Width345 mm
Aspect ratio30
Rim diameterR21
Load index109
Speed rating(Y)
Load rangeXL
SeasonSummer
UTQG300 AA A
Tread depth7/32"
Weight36.4 lbs
Max pressure50 psi
Severe snow (3PMSF)No
Run-flatNo

About the Bridgestone Potenza Sport

Summer Ultra High Performance Passenger Car tire.

Features

* New, ultra-high silica compound* Tread pattern geometry with deep circumferential grooves* Substantial ribs and blocks* 3D sipe technology* Tuned tread sequencing* Platinum Pact Limited Warranty* 90-Day Buy and Try Guarantee

Benefits

* For exceptional grip and responsive handling in extreme performance driving conditions* Promote water evacuation* Maximize rubber to road contact and help maintain contact pressure* Enhance pattern stiffness and provide an optimized balance of traction and wear performance* Minimizes pattern noise, promoting a quiet, comfortable ride

Understanding the 345/30ZR21 XL size

In the size code 345/30R21, 345 is the section width in millimetres (about 13.6"). 30 is the aspect ratio — the sidewall height is 30% of the width, or roughly 103.5 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 29.1".

The load index 109 means each tire supports up to 2,271 lbs — about 9,084 lbs across a full set of four. The speed symbol Y certifies the tire to 186 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Bridgestone Potenza Sport is built for

The Bridgestone Potenza Sport is a summer tire, tuned for maximum dry and wet grip in warm conditions; it is not intended for near-freezing temperatures. Fitment category: Passenger Car, CAR, Performance, UHP.

Tread life and grip ratings

This tire carries a UTQG rating of 300 AA A. The treadwear grade of 300 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade AA measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).

Price and value

At $527.99 per tire, a full set of four costs $2111.96. That is about 16% below the average price of the 3 tires we stock in this size.

Frequently asked questions

What does the tire size 345/30R21 mean?

345 is the section width in millimetres, 30 is the aspect ratio (sidewall height as a percentage of width, about 103.5 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 29.1 inches.

What are the load and speed ratings of the Bridgestone Potenza Sport 345/30ZR21 XL?

Its load index of 109 allows up to 2,271 lbs per tire. Its speed rating of Y is certified to 186 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Bridgestone Potenza Sport 345/30ZR21 XL tires cost?

A single tire is $527.99 and a set of four is $2111.96.

Can the Bridgestone Potenza Sport be used in winter?

No. This is a summer tire and it is not rated for severe snow service. Its compound stiffens as temperatures approach freezing, so fit winter or all-weather tires for cold-season driving.

Does the Potenza Sport come in other sizes?

Yes — we stock 132 additional Potenza Sport sizes besides 345/30ZR21 XL. Fit only a size approved for your vehicle.

Other sizes of this model

205/40R18 XL — $188.24 205/45R17 XL — $153.74 205/45R17 XL — $150.74 205/55R16 XL — $136.49 215/45R17 XL — $167.24 215/45R18 XL — $193.49 225/35R19 XL — $209.99 225/40R18 XL — $170.99 225/40R19 XL — $214.49 225/45R17 XL — $158.99 225/45R18 XL — $200.24 225/45R19 XL — $217.49 225/50R17 XL — $143.99 225/50R18 XL — $211.49 235/35R19 XL — $223.49 235/35R20 XL — $267.74 235/35ZR19 XL — $213.74 235/40R20 XL — $237.74 235/40ZR18 XL — $180.74 235/40ZR19 XL — $236.24 235/45R18 XL — $195.74 235/50R18 XL — $200.24 235/55R20 XL — $304.49 245/30R20 XL — $284.24 245/30ZR20 XL — $331.49 245/35R18 XL — $178.49 245/35R20 XL — $359.24 245/35R20 XL — $331.49 245/35ZR19 XL — $236.99 245/35ZR19 XL — $262.49

Similar tires in 345/30R21