2011 Porsche 911 Tires
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2011 Porsche 911 Tires Sizes, Speed Ratings, and Inflation
Not sure about your Porsche 911 tire size? Use the following chart to find information on tire size, speed rating, and inflation.
| Trim Level | Tire Size | Speed Rating | Inflation in PSI F/R | |
|---|---|---|---|---|
| 2011 Porsche 911 GT3* | 235/35ZR19 | (Y) | 29 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT3* | 305/30ZR19 | (Y) | PSI/31 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT3 RS 4.0* | 325/30ZR19 | (Y) | PSI/33 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT3 RS 4.0* | 245/35ZR19 | (Y) | 28 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Speedster* | 235/35ZR19 | (Y) | 29 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Speedster* | 305/30ZR19 | (Y) | PSI/31 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT3 RS* | 245/35ZR19 | (Y) | 28 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT3 RS* | 325/30ZR19 | (Y) | PSI/33 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT2 RS* | 325/30ZR19 | (Y) | PSI/33 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 GT2 RS* | 245/35ZR19 | (Y) | 28 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo S* | 305/30ZR19 | (Y) | PSI/31 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo S* | 235/35ZR19 | (Y) | 29 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera S* | 295/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera GTS* | 305/30ZR19 | (Y) | PSI/31 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera GTS* | 235/35ZR19 | (Y) | 29 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 295/35R18 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 235/40R18 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 295/35ZR18 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4* | 235/40ZR18 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 235/40R18 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 235/40ZR18 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 265/40ZR18 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 265/40R18 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera* | 295/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 235/40R18 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 295/35R18 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Turbo* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Targa 4S* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 235/40ZR18 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 295/35ZR18 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 235/40R18 | V | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 295/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 235/35ZR19 | (Y) | 36 PSI/ PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 295/35R18 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 305/30ZR19 | (Y) | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 295/30R19 | V | PSI/44 PSI | SHOP THIS TIRE |
| 2011 Porsche 911 Carrera 4* | 235/35R19 | V | 36 PSI/ PSI | SHOP THIS TIRE |
|
2011 Porsche 911 GT3* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 29 PSI/ PSI |
|
2011 Porsche 911 GT3* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/31 PSI |
|
2011 Porsche 911 GT3 RS 4.0* - Size: Shop 325/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/33 PSI |
|
2011 Porsche 911 GT3 RS 4.0* - Size: Shop 245/35ZR19 - Speed Rating: (Y) - Inflation F/R: 28 PSI/ PSI |
|
2011 Porsche 911 Speedster* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 29 PSI/ PSI |
|
2011 Porsche 911 Speedster* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/31 PSI |
|
2011 Porsche 911 GT3 RS* - Size: Shop 245/35ZR19 - Speed Rating: (Y) - Inflation F/R: 28 PSI/ PSI |
|
2011 Porsche 911 GT3 RS* - Size: Shop 325/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/33 PSI |
|
2011 Porsche 911 GT2 RS* - Size: Shop 325/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/33 PSI |
|
2011 Porsche 911 GT2 RS* - Size: Shop 245/35ZR19 - Speed Rating: (Y) - Inflation F/R: 28 PSI/ PSI |
|
2011 Porsche 911 Turbo S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/31 PSI |
|
2011 Porsche 911 Turbo S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 29 PSI/ PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera 4S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera S* - Size: Shop 295/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera GTS* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/31 PSI |
|
2011 Porsche 911 Carrera GTS* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 29 PSI/ PSI |
|
2011 Porsche 911 Targa 4* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Targa 4* - Size: Shop 295/35R18 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Targa 4* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Targa 4* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Targa 4* - Size: Shop 235/40R18 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Targa 4* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Targa 4* - Size: Shop 295/35ZR18 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Targa 4* - Size: Shop 235/40ZR18 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 235/40R18 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 235/40ZR18 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 265/40ZR18 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 265/40R18 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Carrera* - Size: Shop 295/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
|
2011 Porsche 911 Turbo* - Size: Shop 235/40R18 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Turbo* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Turbo* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Turbo* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Turbo* - Size: Shop 295/35R18 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Turbo* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Targa 4S* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 235/40ZR18 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 295/35ZR18 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 235/40R18 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 295/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 235/35ZR19 - Speed Rating: (Y) - Inflation F/R: 36 PSI/ PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 295/35R18 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 305/30ZR19 - Speed Rating: (Y) - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 295/30R19 - Speed Rating: V - Inflation F/R: PSI/44 PSI |
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2011 Porsche 911 Carrera 4* - Size: Shop 235/35R19 - Speed Rating: V - Inflation F/R: 36 PSI/ PSI |
* Note: these models have different tire sizes depending on vehicle options.
Recommended Tires for Your 2011 Porsche 911
What tires are best for a 2011 Porsche 911? The following tire brands and types are a great fit for your Porsche 911.
DriveGuard Plus
- Platinum Pact Limited Warranty
- All-Season
- Performance
Firehawk AS V2
- No warranty
- All-Season
- Performance
Firehawk Indy 500
- Gold Pledge Limited Warranty
- Summer
- Performance
PROXES Sport
- No warranty
- Summer
- Performance
PROXES Sport A/S
- No warranty
- All-Season
- Performance
Potenza RACE
- No warranty
- Summer
- Performance
Potenza RE050A
- Platinum Pact Limited Warranty
- Summer
- Performance
Potenza RE71RS
- No warranty
- Summer
- Performance
Potenza RE980AS+
- Platinum Pact Limited Warranty
- All-Season
- Performance
Potenza Sport
- Platinum Pact Limited Warranty
- Summer
- Performance
Potenza Sport AS
- Platinum Pact Limited Warranty
- All-Season
- Performance
Turanza QUIETTRACK
- No warranty
- All-Season
- Performance
Turanza T005
- No warranty
- Summer
- Performance
Buy Tires for 2011 Porsche 911
Finding the right tires can be quick and easy, especially when you have all the information you need to make a good decision. That's why you should come to see us when it's time to buy new tires for your 2011 Porsche 911. Firestone Complete Auto Care is the tire shop of choice for Porsche 911 tire options. Whether you want tire that's made to improve fuel economy, take tight corners, or handle off-road terrain, you'll find good tires that match your budget.
View the tires Porsche recommends for 2011 911s, plus useful info about Porsche 911 tire size, speed rating, and tire pressure. Come to Firestone Complete Auto Care for tires and you'll experience our best service. As one of our tire managers, Ruben, says, “I make sure you know which tire is the best fit for your car, not only for performance but safety.”
Beyond the correct tire size, you also want to think about a couple of other things when getting new Porsche 911 tires like which tire brands you like most and where you drive. If you live in Florida, you probably won't need studded snow tires anytime soon. In Colorado, though, there's a good chance you'll want Porsche 911 snow tires for a good portion of the year, and maybe even all-season tires for year-round comfort and versatility.
Think about where you live (countryside vs. city vs. mountains) and the kind of unexpected weather you're likely to experience when evaluating your driving conditions. Drivers in states that fully experience all four seasons often buy two sets of tires: one set for winter, one set for summer. It's one of the best ways to maximize their Porsche 911's safety and performance from January to December. Other drivers prefer the convenience of all-season tires. They make one trip to the tire shop and they're pretty much ready for rain, light snow, or sun!
Your personal driving style is the next factor to consider. Do you enjoy pushing your Porsche 911 to the limits? Going where no vehicle has gone before? If you're a big off-roading fan you forges paths where others can't, you have very different needs than a long-distance commuter who sticks to the highway. You'll want a tire that can handle dirt, gravel, stone, sand, and more. You might want to look at bigger tires with stiffer sidewalls and wider tread patterns to help protect against punctures and maintain balance on bumpy roads. But if you're comfortable in the city and suburbs, a Porsche 911 tire that offers a smooth, quiet ride might be exactly what you need. Browse Porsche 911 tires online or come to your nearby Firestone Complete Auto Care for help selecting the tire that's right for you. You're only a click or two away from a new set of 2011 Porsche 911 tires.
Tire Brands for Porsche 911s
You have many great options for Porsche 911 tire brands when you visit Firestone Complete Auto Care. Two of them are Firestone and Bridgestone. Firestone tires for Porsche 911s are always ready to get the job done! The Firestone Tire & Rubber Company was founded in 1900 in Akron, Ohio by Harvey Firestone. He was a visionary from the start. Firestone recognized the overwhelming potential for automobile tires, so he began testing and producing truck, passenger, and farm tires. One of the company's pioneering efforts was the introduction in 1908 of the first all-rubber, non-skid tire! Firestone Tires has been passionate about leading the industry since day one, thanks to Harvey Firestone's industrious spirit. Firestone now makes about 8,000 different tires for all kinds of vehicles — including tires for 2011 Porsche 911s.
Bridgestone is another smart move for Porsche 911 tires. Shojiro Ishibashi founded The Bridgestone Tire Company Ltd. in Japan in 1931. His company merged with The Firestone Tire & Rubber Company in 1990. Today, Bridgestone Tires has more than 55,000 employees and 50 production facilities throughout the Americas. It remains a global leader in tire technology and rubber products, providing world-class service, tires, and more to communities worldwide. As Shojiro Ishibashi put it, Bridgestone is dedicated worldwide to "serve society with superior quality." That means you can find superior quality Bridgestone tires for a 2011 Porsche 911 and drive with peace of mind.
Installing Porsche 911 Tires
Firestone Complete Auto Care has been a leading tire provider for more than a century. We're your one-stop shop for tire installation, rotation, and ongoing maintenance! Buy 2011 Porsche 911 tires online and schedule your installation when it's convenient for you. Many stores are open late and on weekends to better fit your busy schedule.
Questions About 2011 Porsche 911 Tires
Inspecting and caring for your tires is one of the best ways to help them last. Get answers to common Porsche 911 tire questions and learn how to care for new tires.
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Why does Porsche tire inflation matter? Even a tiny decrease in tire pressure could impact your safety and fuel economy. Maintaining proper tire pressure can help increase fuel economy, improve braking time, and boost tire lifespan.
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What do the tire sidewall numbers mean for my Porsche 911? Your tire sidewall numbers tell you the recommended load carrying capacity, speed rating, treadwear, traction, and tire size. Talk to a tire technician to learn how to read Porsche tire numbers.
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Can I check the tread depth on my Porsche tires at home? Grab a penny. Hold the so that Abe Lincon's head is facing you and his hair is pointing toward the ground. Then, place the penny into a tread groove. If you can see the top of Abe’s head, your tread is shallow and it might be time for new Porsche 911 tires.