Bridgestone

Potenza Sport

Name: Bridgestone Potenza Sport 325/30ZR21 XL
Brand: Bridgestone
SKU: 019237
Price: 461.24 USD
Availability: InStock

325/30ZR21 XL

Summer Run-flat

$461.24/tire $614.99

Set of 4: $1844.96

🚚 Standard shipping across the country — delivered with DHL in 2-6 business days. 🔒 SSL-secured checkout.

↩️ Free returns within 30 days — unmounted tires, prepaid label, no return shipping cost.

Specifications

Size	325/30ZR21 XL Potenza Sport Oe
Width	325 mm
Aspect ratio	30
Rim diameter	R21
Load index	108
Speed rating	(Y)
Load range	XL

Season	Summer
UTQG	300 AA A
Tread depth	7/32"
Weight	33.73 lbs
Max pressure	50 psi
Severe snow (3PMSF)	No
Run-flat	Yes

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 325/30ZR21 XL size

In the size code 325/30R21, 325 is the section width in millimetres (about 12.8"). 30 is the aspect ratio — the sidewall height is 30% of the width, or roughly 97.5 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 28.7".

The load index 108 means each tire supports up to 2,205 lbs — about 8,820 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. Run-flat construction lets you keep driving a limited distance at reduced speed after a loss of pressure. 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 $461.24 per tire, a full set of four costs $1844.96. That sits close to the average for the 31 tires we stock in this size.

Frequently asked questions

What does the tire size 325/30R21 mean?

325 is the section width in millimetres, 30 is the aspect ratio (sidewall height as a percentage of width, about 97.5 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 28.7 inches.

What are the load and speed ratings of the Bridgestone Potenza Sport 325/30ZR21 XL?

Its load index of 108 allows up to 2,205 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 325/30ZR21 XL tires cost?

A single tire is $461.24 and a set of four is $1844.96.

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.

Is the Bridgestone Potenza Sport a run-flat tire?

Yes. Run-flat construction supports the vehicle for a limited distance at reduced speed after a loss of air pressure, so you can reach a service point without an immediate roadside change.

Does the Potenza Sport come in other sizes?

Yes — we stock 132 additional Potenza Sport sizes besides 325/30ZR21 XL. Fit only a size approved for your vehicle.