On this page you’ll find the full specifications for this 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat Summer tire — including load/speed ratings, certifications (3PMS / studdable / run-flat / XL), UTQG (when provided by the manufacturer), and shipping details for Ontario and Quebec.
Quick Specs
Size: 345/30R21
Brand / Model: Bridgestone Potenza Sport RFT – Performance Run-Flat
Season: Summer
Certifications: Run-flat, XL (Extra Load)
Delivery (Ontario & Quebec): Free shipping • 1–3 business days (Ontario and Quebec)
345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat Summer
Category: Summer – Supreme Performance
The Bridgestone Potenza Sport RFT is crafted for those who demand supreme performance during the summer months. This tire is a powerhouse of technology, delivering an exceptional blend of traction, precision, and endurance. Its summer-tuned compound adapts to high temperatures, ensuring optimal road contact for spirited driving. With reinforced sidewalls designed to maintain the tire's shape, the Potenza Sport RFT allows for continued driving even after a puncture. Ideal for performance enthusiasts who seek a tire that responds with agility and confidence, the Bridgestone Potenza Sport RFT offers an extraordinary drive that keeps pace with the unforgiving heat and demands of summer roads.
Run-flat technology indicated.
How this tire is positioned
345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is positioned as a summer / summer – supreme performance tire built around a 345 mm section width and 21-inch wheel fitment.
In practical terms, this size combines a 30-series sidewall of about 104 mm with a 21-inch wheel diameter, which is useful when matching an existing tire size and wheel setup.
Feature-wise, this listing indicates run-flat construction, an XL extra-load rating, UTQG 300 AA A when provided by the manufacturer.
About the 345/30R21 tire size
The 345/30R21 size breaks down as follows:
345 — tread width in millimetres
30 — sidewall height as a percentage of tread width (approx. 104 mm)
R21 — fits a 21-inch rim
The 345/30R21 size is commonly found on performance vehicles and heavy-duty trucks. If you’re matching an existing set, confirm the full size marking on your sidewall before ordering.
Key features — Bridgestone Potenza Sport RFT – Performance Run-Flat in 345/30R21
Run-flat construction (where supported by vehicle and setup).
XL (Extra Load) rating indicated.
UTQG: 300 AA A (when provided by manufacturer).
Size: 345/30R21 (fits an 21-inch wheel).
Find tires for your vehicle
Select your year, make, model, and trim to see all compatible tires available for delivery across Ontario and Quebec:
The 345/30R21 size indicates a tread width of 345 mm, a sidewall ratio of 30% (approximately 104 mm tall), and a 21-inch rim diameter. This size is commonly found on performance vehicles and heavy-duty trucks.
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat a Summer tire?
Yes — the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is categorized as a Summer tire.
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat 3PMS rated?
The listing for the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat does not specify 3PMS certification. Verify with the manufacturer’s specification sheet for confirmation.
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat studdable?
The listing for the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat does not specify studdable capability. Contact us or check the manufacturer’s documentation for confirmation.
Does the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat support run-flat driving?
Yes — the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is listed as a run-flat tire. Run-flat tires require a compatible vehicle with a functioning Tire Pressure Monitoring System (TPMS).
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat an XL (extra load) tire?
Yes — the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat carries an XL (extra load) rating, enabling it to handle higher inflation pressures and greater load capacities than a standard-load equivalent.
Can I order the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat with delivery to Ontario or Quebec?
Yes — XYZTires ships the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat to addresses across Ontario and Quebec. Free shipping • 1–3 business days (Ontario and Quebec).
Other available sizes — Bridgestone Potenza Sport RFT – Performance Run-Flat