2011 Infiniti balanced Japanese luxury with a distinctly sporty edge, spanning compact rear-drive sedans and coupes in the G lineup and larger premium sedans in the M range. It was a year when Infiniti leaned hard into performance-oriented proportions, so tire choice across the lineup matters more than year and make alone might suggest. Four 2011 Infiniti models use seven different tire sizes, with some sizes shared across model families and others tied to specific G37 or M-series applications. The practical first step is to confirm your exact model and wheel diameter, then decide whether you are matching an original-style fitment or selecting a radial product that suits how you plan to drive the car.
Which Tire Size Is Right for Your 2011 Infiniti
Seven tire sizes fit 2011 Infiniti vehicles, and they vary by model rather than being shared across the full lineup. Because every size here is a radial but the year uses 17-, 18-, 19-, and 20-inch wheel diameters, the real decision starts with confirming the correct wheel diameter and then narrowing down the exact size for your model. Understanding that distinction before choosing a product saves time and helps ensure the right match.
Year(s): 2011|Fit(s): G25, G37|Construction: Radial|Rim: 17 in
225/55R17 is a metric radial with a 225-millimeter section width, a 55-series aspect ratio, and a 17-inch rim diameter. It is available from BFGoodrich in Blackwall and Wide Whitewall form, and speed ratings vary by product with W-rated options up to 168 mph. This size is shared by the G25 and certain G37 applications, making it a natural choice for owners who need the 17-inch fitment while still choosing between a modern performance look and a more distinctive sidewall treatment.
Year(s): 2011|Fit(s): G37|Construction: Radial|Rim: 19 in
225/45R19 is a metric radial with a 225-millimeter section width, a 45-series aspect ratio, and a 19-inch rim diameter. It is specific to G37 applications rather than the full 2011 Infiniti range, and it comes from BFGoodrich in Blackwall form with both W-rated options up to 168 mph and a Y-rated option up to 186 mph. Choose this size if your G37 uses the narrower 19-inch front fitment and you want to stay with the wheel diameter and proportions intended for that setup.
Year(s): 2011|Fit(s): G37|Construction: Radial|Rim: 18 in
225/50R18 is a metric radial with a 225-millimeter section width, a 50-series aspect ratio, and an 18-inch rim diameter. It is specific to G37 applications and is available from BFGoodrich in Blackwall form, with W-rated products up to 168 mph. This size suits G37 owners who need the 18-inch front fitment and want a straightforward modern radial choice without changing diameter or overall character.
Year(s): 2011|Fit(s): G37|Construction: Radial|Rim: 19 in
245/40R19 is a metric radial with a 245-millimeter section width, a 40-series aspect ratio, and a 19-inch rim diameter. It is specific to G37 applications, available from BFGoodrich in Blackwall form, and carries both W-rated options up to 168 mph and a Y-rated option up to 186 mph. This is the wider 19-inch G37 fitment, so it is the correct direction when your car uses the broader staggered-size arrangement rather than the narrower companion size.
Year(s): 2011|Fit(s): G37|Construction: Radial|Rim: 18 in
245/45R18 is a metric radial with a 245-millimeter section width, a 45-series aspect ratio, and an 18-inch rim diameter. It is specific to G37 applications and is available in Blackwall form from BFGoodrich and Nitto, with W-rated products up to 168 mph and a Y-rated option up to 186 mph. This is the wider 18-inch G37 fitment and is the right choice when your car uses the matching broad rear or wider-position setup for that wheel diameter.
Year(s): 2011|Fit(s): M37, M56|Construction: Radial|Rim: 18 in
245/50R18 is a metric radial with a 245-millimeter section width, a 50-series aspect ratio, and an 18-inch rim diameter. It is shared by the M37 and M56 and comes from Pro-Trac with RWL and Redline sidewall styles. This size makes sense for M-series owners using the 18-inch fitment who want to preserve the correct dimensions while choosing the sidewall treatment that best matches the car's appearance.
Year(s): 2011|Fit(s): M37, M56|Construction: Radial|Rim: 20 in
245/40R20 is a metric radial with a 245-millimeter section width, a 40-series aspect ratio, and a 20-inch rim diameter. It is shared by the M37 and M56, available from BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL form, and speed ratings vary by product with W-rated options up to 168 mph and a Y-rated option up to 186 mph. Choose this size if your M-series runs the 20-inch wheel package and you want to stay with that lower-profile, larger-diameter fitment.
Four 2011 Infiniti models are covered here, and tire size varies by model rather than carrying across the entire make. That matters because a G25, a G37, and the larger M-series sedans do not all use the same wheel diameter or section width, so identifying the exact model is the first step before choosing a tire size. Select a model below to narrow into model-specific fitment history and products.
2011 Infiniti G25
The G25 was Infiniti's entry point into the G sedan family, giving buyers the same basic rear-drive luxury-sport character in a more accessible package. Its tire fitment here stays on a 17-inch wheel, which keeps the selection simple compared with the wider spread used across the G37 range.
The G37 was the performance heart of the 2011 Infiniti passenger-car lineup, available in configurations that emphasized sharper handling and more aggressive wheel-and-tire packages. That wider mission shows up in its fitments, which span 17-, 18-, and 19-inch wheels and include both narrower and wider size pairings depending on the application.
The M37 represented Infiniti's midsize luxury sport-sedan formula, blending a more substantial body with the brand's driver-focused feel. Its tires mount on either 18-inch or 20-inch wheels, reflecting the difference between a more traditional luxury-sedan stance and a larger-diameter sport appearance.
The M56 sat at the top of the M lineup, bringing V8-powered flagship character to Infiniti's rear-drive luxury sedan range. Its tire sizes mirror the M37 on 18-inch and 20-inch wheels, so the choice is less about model-year family differences and more about matching the wheel package actually on the car.
Twenty-six products are available across seven tire sizes for 2011 Infiniti vehicles. 225/55R17 has 5 radial choices from BFGoodrich in Blackwall and Wide Whitewall styles; 225/45R19 has 3 BFGoodrich Blackwall radials; 225/50R18 has 3 BFGoodrich Blackwall radials; 245/40R19 has 3 BFGoodrich Blackwall radials; 245/45R18 has 4 Blackwall radials from BFGoodrich and Nitto; 245/50R18 has 2 Pro-Trac radials in RWL and Redline; 245/40R20 has 5 radials from BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL styles. Confirm your exact size first, since speed ratings can vary between products within the same size.
These answers focus on how 2011 Infiniti tire sizing changes between the G and M model lines, what each metric size means, and how sidewall style, speed rating, and collector-car storage habits affect the final choice.
Size Basics & Fitment
What tire sizes fit 2011 Infiniti vehicles?
2011 Infiniti vehicles use seven sizes across four model lines: 225/55R17 for the G25 and some G37 applications, 225/45R19, 225/50R18, 245/40R19, and 245/45R18 for the G37, plus 245/50R18 and 245/40R20 for the M37 and M56. The rim diameters span 17, 18, 19, and 20 inches, so fitment is tied closely to the wheel package on the car rather than to the make alone.
That means year and make are only the starting point for a 2011 Infiniti. A G37 can use several different sizes depending on configuration, while the M37 and M56 share two larger sedan fitments. If you are unsure, confirm the size on the sidewall of the tires already on the car and verify that it matches the wheel diameter before narrowing down brand, sidewall style, or speed rating.
What does 225/55R17 mean on a 2011 Infiniti tire?
On a 2011 Infiniti, 225/55R17 means the tire is 225 millimeters wide, has a 55-series aspect ratio, uses radial construction, and mounts on a 17-inch wheel. That size appears on the G25 and on certain G37 applications. Products in this size are available in Blackwall and Wide Whitewall versions, so the same basic dimension can support very different visual styles.
The key point is that the 17 at the end is the wheel diameter, not an interchangeable styling number. If your 2011 Infiniti currently has 17-inch wheels, this size keeps you in the correct diameter range, but you still need to match the exact model application and wheel width. A 225/55R17 tire fits a different wheel than an 18- or 19-inch G37 size, even if the car family name is the same.
Do all 2011 Infiniti models use the same tire size?
No. 2011 Infiniti models do not share one universal tire size. The G25 uses 225/55R17, the G37 spans five sizes across 17-, 18-, and 19-inch wheels, and the M37 and M56 share 245/50R18 and 245/40R20. Every size in this group is a radial, but the wheel diameters and section widths vary substantially from one model line to another.
That variation matters because a buyer cannot safely choose tires for a 2011 Infiniti by year and make alone. The model, and often the specific wheel package, must be confirmed first. Once you know that, the choice becomes much more straightforward: stay with the exact size that belongs to your application, then compare sidewall style, brand, and speed rating within that size.
Buying the Right Tire
What sidewall styles are available for 2011 Infiniti tires?
2011 Infiniti tire options include Blackwall, Wide Whitewall, RWL, and Redline sidewall styles, depending on size. Blackwall is the dominant look across the G25, G37, and larger 19- and 20-inch applications. Wide Whitewall appears in 225/55R17, while 245/50R18 offers RWL and Redline, and 245/40R20 offers Blackwall and RWL choices.
For most 2011 Infiniti owners seeking an appearance close to the era's original luxury-sport presentation, Blackwall is the natural visual match. The whitewall, redline, and raised-white-letter options are more style-driven choices and can significantly change the look of a newer luxury performance car. If appearance matters as much as fitment, decide on sidewall treatment after confirming the exact size your model uses.
What brands make tires for 2011 Infiniti vehicles?
2011 Infiniti fitments are covered here by BFGoodrich, Nitto, and Pro-Trac. BFGoodrich covers 225/55R17, 225/45R19, 225/50R18, 245/40R19, 245/45R18, and 245/40R20. Nitto appears in 245/45R18 and 245/40R20, while Pro-Trac covers 245/50R18 and 245/40R20 with style-oriented sidewall options.
Brand choice on a 2011 Infiniti often narrows quickly once you know the size. Some sizes are exclusively BFGoodrich, while others open the door to a second or third brand and a broader mix of sidewall styles or speed ratings. If your priority is keeping several brands in play, confirm the size first, because that determines whether you are choosing among multiple makers or within a single-brand range.
What is the difference between BFGoodrich and Nitto in 245/45R18 for a 2011 Infiniti?
In 245/45R18 for a 2011 Infiniti, BFGoodrich offers multiple Blackwall radials, including W-rated and Y-rated choices, with rim-width ranges centered around 7.5 to 9.0 inches. Nitto's 245/45ZR18 XL 100W is also a Blackwall radial and uses a comparable 7.5 to 9.0 inch rim-width range. Load figures shown in this size reach 1,764 pounds at 50 psi on the Nitto and on one BFGoodrich option, while another BFGoodrich version carries a 1,565-pound figure at 51 psi.
For a 2011 Infiniti owner, the practical difference is less about basic fitment and more about which exact spec profile matches the car's use. If you want to compare within the same size, look at speed rating, extra-load marking, and the load-and-pressure figure on the individual tire rather than assuming every 245/45R18 behaves the same. That approach gives you a more precise match than brand name alone.
Fitting & Setup
What rim width do 2011 Infiniti tires require?
Several 2011 Infiniti sizes include clear rim-width ranges. 225/55R17 fits 6.0 to 8.0 inches on most options, with one version extending to 9.0 inches; 225/45R19 fits 7.0 to 8.5 inches; 225/50R18 fits 6.0 to 8.0 inches; 245/40R19 fits 8.0 to 9.5 inches; 245/45R18 fits 7.5 to 9.0 inches; and 245/40R20 fits 8.0 to 9.5 inches. Those ranges are specific to the tire size and, in some cases, the individual product.
Rim width matters because two tires with the same nominal size can still have slightly different approved wheel ranges. Before final selection, measure or confirm the actual wheel width on your 2011 Infiniti and compare it to the tire you are considering, especially if the car has aftermarket wheels. That extra check is particularly useful on the wider 245-series performance sizes where wheel width has a stronger effect on how the tire sits and wears.
Can the original 2011 Infiniti wheels be used with all tire sizes?
No single original 2011 Infiniti wheel works with all seven sizes because the fitments span 17-, 18-, 19-, and 20-inch diameters. A 17-inch wheel only accepts 225/55R17, an 18-inch wheel only accepts the 18-inch sizes, a 19-inch wheel only accepts the 19-inch sizes, and a 20-inch wheel only accepts 245/40R20. Wheel diameter is the first hard limit in the fitment decision.
Within the same diameter, some applications pair a narrower and wider size, especially on the G37. That means you should confirm not only diameter but also whether your car uses the narrower or wider companion size on a given wheel package. If the car has changed hands or wears aftermarket wheels, inspect both the wheel and current tire sidewall before assuming that the size fitted today matches the original configuration.
Maintenance, Storage & Longevity
How should I store a 2011 Infiniti when the tires are fitted?
A 2011 Infiniti should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing sources. Inflate the tires to the vehicle or tire-maker's appropriate cold pressure before storage and move the car periodically if possible. Radial tires generally tolerate storage well, but long static periods can still create temporary flat spotting and accelerate sidewall aging when conditions are poor.
If the car will sit for months, clean the tires, keep them off wet concrete when practical, and consider stands or cradles if the vehicle is part of a long-term collection. A 2011 Infiniti with low annual mileage can still age its tires out before it wears them out. Good storage habits preserve appearance, help maintain ride quality, and reduce the chance of finding cracks or pressure loss when the car returns to regular road use.
How long do tires on a 2011 Infiniti typically last?
On a 2011 Infiniti, tire age usually matters more than mileage once the car becomes a low-use luxury or enthusiast vehicle. A sound rule is to begin evaluating the tires closely around five to seven years of age and to treat ten years as the point where replacement deserves serious consideration regardless of remaining tread. The DOT date code on the sidewall tells you when each tire was made.
Performance-oriented sizes such as the 18-, 19-, and 20-inch fitments on a 2011 Infiniti may still look acceptable while the rubber has already hardened with age. That can affect wet-weather behavior, ride, and braking feel before the tread appears worn out. If the car has sat frequently or sees only seasonal use, date-code checks and a hands-on inspection are more useful than mileage alone when deciding whether the tires are still serviceable.
How often should tires on a 2011 Infiniti be inspected?
Tires on a 2011 Infiniti should be inspected before every drive and given a more careful check before any extended highway outing. Look for sidewall cracking, punctures, bulges, uneven wear, and pressure loss, and inspect the tread surface for age-related hardening or separation concerns. Because these fitments are low-profile radials in several cases, curb damage and inner-shoulder wear deserve close attention as well.
A quick visual check takes only a minute and can prevent a ruined trip or damage to expensive wheels. Before a longer drive, verify cold pressure, examine the spare if the car carries one, and pay attention to vibration or pull that may point to alignment or tire issues. On a 2011 Infiniti that may alternate between storage and spirited use, frequent inspection is one of the simplest ways to keep the car road-ready.
Restoration & Authenticity
What tires were originally fitted to the 2011 Infiniti G25?
A 2011 Infiniti G25 from this group uses 225/55R17 radial tires. That is consistent with the period, since a 2011 premium sport sedan would have left the radial era far behind and relied on modern metric radial sizing from the factory. The exact original-brand supply could vary by assembly source, equipment package, and market, so the crucial authenticity point is the correct size, wheel diameter, and overall style rather than assuming one universal brand.
For a factory-faithful presentation, start by matching the exact size and a sidewall appearance that suits a 2011 luxury sport sedan, which generally means Blackwall. If your car has unusual option content or regional-market differences, original window stickers, owner's literature, and Infiniti enthusiast communities are the best places to confirm the tire brand and specification that would be most accurate for that particular car.
Does correct tire fitment matter for showing a 2011 Infiniti?
Yes, correct tire fitment matters when showing a 2011 Infiniti, especially in classes that value original presentation. Judges and knowledgeable enthusiasts notice whether the car wears the proper size range, the correct wheel diameter, and a sidewall style that fits the period character of the vehicle. On a modern luxury-performance Infiniti, an obviously non-era appearance such as a wide whitewall or a decorative redline can stand out immediately unless the car is being shown in a custom context.
That does not mean every event applies the same standard. Some gatherings reward originality, while others are more relaxed about personalized choices. If the goal is authenticity, verify the exact model fitment first and keep the tire's visual treatment aligned with the way a 2011 Infiniti would normally have appeared when new. Event rules, club judging guides, and marque forums are the best sources for class-specific expectations.
What is the difference between BFGoodrich and Pro-Trac in 245/40R20 for a 2011 Infiniti?
In 245/40R20 for a 2011 Infiniti, BFGoodrich offers Blackwall radials with both W and Y speed ratings, and one BFGoodrich option carries a load figure of 1,709 pounds at 50 psi. Pro-Trac offers the same basic size in radial form with an RWL sidewall style, giving the tire a different visual character. BFGoodrich options in this size also show an 8.0 to 9.5 inch rim-width range where noted.
The practical split is appearance and spec detail rather than diameter fitment, since both remain 245/40R20 radials. If you want a more contemporary luxury-sport look, the Blackwall BFGoodrich versions align naturally with the car's era. If a period-inspired raised-white-letter style is part of a custom presentation, Pro-Trac changes the visual tone without changing the size itself. Check the individual tire's sidewall marking and speed rating before making the final choice.
Safety & Road Use
Are 2011 Infiniti tires safe for highway driving?
Yes, 2011 Infiniti tire options here are suitable for highway driving when they are correctly sized, in good condition, and inflated properly. The available speed ratings include W, which is rated to 168 mph, and Y, which is rated to 186 mph, depending on size and product. Those ceilings are far beyond ordinary U.S. highway use, so real-world safety depends more on tire condition, pressure, alignment, and the car's overall mechanical health than on chasing the highest speed letter alone.
For normal road use, the best approach is to choose the correct size for the model and wheel package, then inspect the tires carefully before relying on the car at sustained speeds. Even a relatively modern 2011 Infiniti is now old enough that age, storage history, and previous maintenance matter. A fresh, properly matched W- or Y-rated tire is only one part of the equation alongside brakes, suspension condition, and wheel integrity.
What inflation pressure should I use for 2011 Infiniti tires?
Inflation pressure for a 2011 Infiniti should start with the factory recommendation on the car's tire placard or in the owner's manual, because that target is tied to the vehicle's weight balance and intended ride. Some tire options also show their maximum load and pressure figures, such as 225/55R17 up to 1,819 pounds at 50 psi, 225/45R19 up to 1,565 pounds at 50 psi, 225/50R18 up to 1,709 pounds at 50 psi, 245/40R19 up to 1,653 pounds at 50 psi, 245/45R18 up to 1,764 pounds at 50 psi, and 245/40R20 up to 1,709 pounds at 50 psi.
Those numbers are tire-capacity limits, not automatic vehicle operating pressures. A 2011 Infiniti should not simply be inflated to the maximum shown on the sidewall unless the vehicle maker calls for it. Use the car's recommended cold pressure as your baseline, then confirm that the tire you choose meets the load needs of the application. If the car has been modified or carries non-original wheels, a knowledgeable alignment or marque specialist can help verify the final setup.
What should I check before taking a 2011 Infiniti on a longer drive?
Before a longer drive in a 2011 Infiniti, inspect each tire for cracking, cuts, bulges, punctures, uneven wear, and proper cold inflation pressure. Check that the tire size matches the wheel diameter on the car, verify that valve stems are in good condition, and look at the date codes if the tires have been on the car for several seasons. If the car uses staggered sizing, make sure the narrower and wider tires are in the positions intended for that setup.
That tire check should be part of a broader pre-trip inspection on any aging luxury-performance car. Confirm alignment feel, brake condition, fluid levels, and the spare or roadside backup plan before setting out. A 2011 Infiniti can be an excellent road car when properly prepared, but longer drives are where neglected tire age, pressure drift, or a mismatched size are most likely to show up. A few minutes in the garage usually saves a great deal of trouble later.
