Additional information
| Season | |
|---|---|
| width | |
| profile | |
| diameter | |
| Load Index | |
| Speed Index | |
| Brand | |
| Vehicle Type | Passenger |
| Sidewall | Black Sidewall |
| Min Wheel Width | 11.5 |
| Max Wheel Width | 12.5 |
| Tread Depth | 7 |
| uTQG | 300 AA A |
| XL | XL |
| RunFlat | Run Flat |
Detailed specifications
Listed are full spes for this 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat Summer tire — including load/speed ratings, certifications (3PMS / studdable / run-flat / XL), UTQG treadwear/traction/temperature grading, and shipping details for Ontario and Quebec.
Why choose the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat?
345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is positioned as a summer / summer – supreme performance / passenger fitment tire with clear Ontario and Quebec delivery details.
Free shipping • 1–3 business days (Ontario and Quebec)OutofstockOntario & Quebec delivery focusSpecs, fitment notes, and FAQ on page
Best fit if you want
- Warm weather grip, responsive steering, and sportier handling.
- Drivers who already switch to dedicated winter tires when temperatures drop.
- Vehicles designed for run flat tires with a working TPMS system.
- Fitments that require XL (extra load) capacity.
Double-check if you need
- Quebec winter tire compliance or cold weather winter driving.
- A one tire year round setup for Ontario or Quebec.
| Buying option | What to compare |
|---|---|
| Lowest sticker price tires | Check shipping, stock status, delivery timing, and whether the final landed cost is still lower after checkout. |
| XYZTires.com | Assist with fitment context, Ontario/Quebec free delivery, and product specific FAQ. |
Quick Specs
- Size: 345/30R21
- Brand / Model: Bridgestone Potenza Sport RFT – Performance Run-Flat
- Season: Summer
- Vehicle Type: Passenger
- Load / Speed: 111Y (Load index 111 supports up to 1090 kg per tire; speed rating Y rated up to 300 km/h)
- 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 design allows you to still drive a short distance despite having a puncture. Must be used with a compatible vehicle and TPMS.
What these tire specs mean
- Load Index 111 is the tire’s standardized carrying capacity, supporting up to 1090 kg per tire. Use it to confirm the tire meets or exceeds the load rating listed on your vehicle placard.
- Speed Rating Y indicates the tire’s maximum sustained speed capability under proper load and inflation. This is approximately 300 km/h under proper load and inflation.
- UTQG 300 AA A is the manufacturer treadwear, traction, and temperature grading system. It is useful for comparing tires from the same brand, but it should not be treated as an exact mileage promise.
- Summer tires are built for warm weather grip and should not be used as winter tires in Ontario or Quebec cold weather conditions.
- XL means Extra Load. These tires are designed to carry higher loads at higher inflation pressures than a standard load tire in the same size, which matters for heavier vehicles, loaded vehicles, or factory fitments that require XL.
- Run flat tires can temporarily support the vehicle after pressure loss, allowing you to keep control and drive a limited distance to service. Note that they require a compatible vehicle setup and a working TPMS system.
- Vehicle Type helps identify whether the tire is intended for passenger, light truck, commercial, or similar service categories.
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 tire indicates run flat construction, an XL extra load rating, load index 111 and speed rating Y (~300 km/h), 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: built to support temporary driving after pressure loss on compatible vehicles with TPMS.
- XL (Extra Load): designed for higher load capacity at higher inflation pressure than standard load tires.
- UTQG: 300 AA A — treadwear, traction, and temperature grading to help compare similar tires.
- Load/Speed: 111Y — load index 111 supports up to 1090 kg per tire, while speed rating Y is rated up to 300 km/h.
Vehicles that commonly use 345/30R21 tires
Examples from our vehicle fitment lookup include:
- 2024 Lamborghini Revuelto
Find tires for your vehicle
Select your year, make, model, and trim to see all compatible tires available for delivery across Ontario and Quebec:
Shop more tires — Ontario & Quebec delivery
Frequently asked questions — 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat Summer
What does the 345/30R21 tire size mean?
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.
What does the 111Y rating mean on the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat?
On the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat, the service description 111Y indicates a load index of 111 and a speed rating of Y (approximately 300 km/h). The load index is the tire’s standardized carrying capacity, while the speed rating is the maximum sustained speed under proper load and inflation. Always match or exceed your vehicle manufacturer’s required load and speed ratings.
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat 3PMS rated?
No — the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is not listed as 3PMS rated.
Is the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat studdable?
This tire, 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat is not studdable. Contact us for any questions.
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.
What does speed rating Y mean on the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat?
Speed rating Y on the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat corresponds to a maximum sustained speed of approximately 300 km/h under full load. Always obey posted speed limits regardless of tire rating.
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).
Why buy the 345/30R21 Bridgestone Potenza Sport RFT – Performance Run-Flat from XYZTires if another tire looks cheaper?
A lower sticker price is only one part of the tire purchase. Compare the final delivered cost, shipping time, stock status, fitment details, and whether the tire category matches how you drive. XYZTires focuses on clear Ontario and Quebec delivery details, product specifications, and fitment context so you can compare the real delivered value, not just the first price you see.
Other available sizes — Bridgestone Potenza Sport RFT – Performance Run-Flat
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