2017 Infiniti marked a mature point in the brand’s modern lineup, with sport sedans, coupes, and larger luxury four-doors all sharing a focus on sharp styling and performance-oriented road manners. The Q50 and Q60 carried the athletic side of the range, while the Q70 and long-wheelbase Q70L leaned more toward executive comfort and presence. Across 2017 Infiniti, six tire sizes appear over four model lines, and they vary by model rather than carrying one universal fitment across the whole make. The first step is confirming whether you have a Q50, Q60, Q70, or Q70L, then matching the correct wheel diameter and size before narrowing down tire style.
Which Tire Size Is Right for Your 2017 Infiniti
Six tire sizes are used across 2017 Infiniti vehicles, and they vary by model rather than being shared across the full lineup. Because every option here is a radial but the rim diameters range from 17 to 20 inches, the real decision starts with confirming your model and wheel diameter first, then choosing the product style that best suits how the car is driven. Understanding those differences before choosing a product saves time and helps match the tire to the correct Infiniti application.
Year(s): 2017|Fit(s): Q50|Construction: Radial|Rim: 17 in
225/55R17 is a metric radial size with a 225 millimeter section width, a 55-series aspect ratio, and a 17-inch rim diameter. This size is specific to the Q50 and is available from BFGoodrich in Blackwall and Wide Whitewall styles, with W speed-rated products and load figures reaching 1,819 pounds at 50 psi on some versions. It suits a Q50 owner who wants the correct 17-inch fitment and then needs to choose between contemporary Blackwall styling or a more distinctive custom-oriented whitewall look.
Year(s): 2017|Fit(s): Q50, Q60|Construction: Radial|Rim: 19 in
245/40R19 is a metric radial size with a 245 millimeter section width, a 40-series aspect ratio, and a 19-inch rim diameter. It serves both the Q50 and Q60 and comes from BFGoodrich in Blackwall form, with speed ratings that vary by product between W and Y, carrying ceiling ratings of 168 mph and 186+ mph respectively. This is the front-size fitment to confirm on many 19-inch Q50 and Q60 applications, especially when matching a staggered setup that pairs it with a wider rear tire.
Year(s): 2017|Fit(s): Q50, Q60|Construction: Radial|Rim: 19 in
265/35R19 is a metric radial size with a 265 millimeter section width, a 35-series aspect ratio, and a 19-inch rim diameter. It fits Q50 and Q60 models that use the wider 19-inch rear fitment, and it is available from BFGoodrich and Nitto in Blackwall styling, with W and Y speed-rated versions that carry ceiling ratings of 168 mph and 186+ mph. This is the size to confirm for the rear of staggered 19-inch sport applications rather than for every 2017 Infiniti model.
Year(s): 2017|Fit(s): Q60|Construction: Radial|Rim: 19 in
255/40R19 is a metric radial size with a 255 millimeter section width, a 40-series aspect ratio, and a 19-inch rim diameter. This size is specific to the Q60 and comes from BFGoodrich in Blackwall styling, with speed ratings that vary by product between W and Y, carrying ceiling ratings of 168 mph and 186+ mph respectively; some versions also show load capacity up to 1,764 pounds at 50 psi. It is the size to confirm when your Q60 uses this 19-inch application instead of the staggered pairing seen on other sport-oriented setups.
Year(s): 2017|Fit(s): Q70, Q70L|Construction: Radial|Rim: 20 in
245/40R20 is a metric radial size with a 245 millimeter section width, a 40-series aspect ratio, and a 20-inch rim diameter. It is used on the Q70 and Q70L, and it is available from BFGoodrich, Nitto, and Pro-Trac in Blackwall and RWL styles, with W and Y speed-rated choices that vary by product and carry ceiling ratings of 168 mph and 186+ mph. This size fits buyers who have the larger 20-inch wheel package on Infiniti’s full-size sedan platform and want to choose between a more contemporary black sidewall or a more visual custom look.
Year(s): 2017|Fit(s): Q70, Q70L|Construction: Radial|Rim: 18 in
245/50R18 is a metric radial size with a 245 millimeter section width, a 50-series aspect ratio, and an 18-inch rim diameter. It applies to the Q70 and Q70L and comes from Pro-Trac with RWL and Redline sidewall treatments, using W speed-rated versions with a 168 mph ceiling. This is the size to confirm for 18-inch Q70 and Q70L applications, especially if sidewall appearance is part of the decision.
Four 2017 Infiniti model lines are covered here: Q50, Q60, Q70, and Q70L. Tire sizing changes by model, so year and make alone are not enough to choose correctly; you need to identify the exact model and, in some cases, whether the car uses a staggered sport setup or a different wheel package. Select a model below to narrow the fitment history and products to the Infiniti you actually own.
2017 Infiniti Q50
The 2017 Infiniti Q50 was the brand’s compact luxury sport sedan, aimed at buyers who wanted sharper handling and a more athletic look than a traditional midsize executive car. Q50 fitments here span both 17-inch and 19-inch wheels, including a staggered 19-inch arrangement on some applications, so wheel diameter matters before anything else.
The 2017 Infiniti Q60 carried the brand’s coupe identity, with sleeker proportions and a more overtly performance-minded personality than the four-door models. Its tires mount on 19-inch wheels in the sizes shown here, with certain applications using a wider rear tire than front for a staggered setup.
The 2017 Infiniti Q70 was Infiniti’s larger luxury sedan, positioned for buyers who wanted more cabin space and a more traditional premium-sedan feel without giving up the brand’s performance edge. Q70 applications here use either 18-inch or 20-inch wheels, so confirming the actual wheel package is the key first step.
The 2017 Infiniti Q70L stretched the Q70 formula with additional rear-seat space, giving it a more formal long-wheelbase character suited to luxury touring and executive use. Like the standard Q70, it uses either 18-inch or 20-inch wheel fitments among the sizes covered here, making wheel diameter the main checkpoint before choosing a tire.
Twenty-four products are available across six tire sizes for 2017 Infiniti vehicles. 225/55R17 has four BFGoodrich radial choices in Blackwall and Wide Whitewall; 245/40R19 has three BFGoodrich radial Blackwalls; 265/35R19 has three BFGoodrich and Nitto radial Blackwalls; 255/40R19 has four BFGoodrich radial Blackwalls; 245/40R20 has four BFGoodrich, Nitto, and Pro-Trac radials in Blackwall and RWL; 245/50R18 has two Pro-Trac radials in RWL and Redline. Confirm the exact size first, then compare sidewall style and speed rating where they vary within the size.
These answers cover how 2017 Infiniti tire sizing changes between Q50, Q60, Q70, and Q70L models, how staggered 19-inch setups differ from single-size applications, and what to check for sidewall style, speed rating, storage, and longer-drive preparation.
Size Basics & Fitment
What tire sizes fit 2017 Infiniti vehicles?
2017 Infiniti vehicles use six sizes across four model lines: 225/55R17 for the Q50; 245/40R19 and 265/35R19 for Q50 and Q60 applications; 255/40R19 for the Q60; and 245/40R20 plus 245/50R18 for the Q70 and Q70L. Those sizes mount on 17-, 18-, 19-, or 20-inch wheels depending on model and package, so there is no one-size-fits-all answer for the full 2017 Infiniti range.
The practical takeaway is that year and make alone are not enough here. A Q50 owner needs to confirm whether the car has the 17-inch setup or a 19-inch configuration, while a Q60 owner may need to confirm whether the coupe uses a staggered arrangement. Q70 and Q70L owners should verify whether the car has 18-inch or 20-inch wheels before choosing any product.
What does 225/55R17 mean on a 2017 Infiniti tire?
On a 2017 Infiniti, 225/55R17 is a modern metric radial size. The 225 is the nominal section width in millimeters, 55 is the aspect ratio, R means radial construction, and 17 is the wheel diameter in inches. Within the 2017 Infiniti range, this size belongs to the Q50 and uses a 17-inch wheel.
That code matters because it tells you more than just width. A tire with the same width but a different aspect ratio or rim diameter is a different fitment, and mixing those up can change overall height and wheel compatibility. If your Q50 currently wears 17-inch wheels, this size points you to the correct fitment family before you compare sidewall style, speed rating, or brand.
Do all 2017 Infiniti models use the same tire size?
No, 2017 Infiniti models do not all use the same tire size. The Q50 spans 225/55R17, 245/40R19, and 265/35R19; the Q60 uses 255/40R19, 245/40R19, and 265/35R19; and the Q70 and Q70L use either 245/50R18 or 245/40R20. Even where two models share a size, that does not make it universal across the entire make.
This matters most when an Infiniti changes hands without its original wheels, or when a buyer is working from memory instead of checking the car itself. The safest path is to confirm the model badge, measure or read the wheel diameter, and compare the existing tire marking before choosing a replacement. That avoids buying a 19-inch sport tire for a sedan that actually wears 18-inch or 17-inch wheels.
Buying the Right Tire
What sidewall styles are available for 2017 Infiniti tires?
2017 Infiniti tire choices span several sidewall looks depending on size. Most sizes center on Blackwall radials, including the sport-oriented 19- and 20-inch applications. The 225/55R17 size for the Q50 also appears in a Wide Whitewall version, while the 245/40R20 and 245/50R18 sizes include options with RWL, and 245/50R18 also appears with a Redline sidewall.
For most owners, Blackwall will be the most natural visual fit for a modern Infiniti sedan or coupe. The whitewall, redline, and raised-white-letter options speak more to a custom look than a factory-style 2017 presentation. If appearance is part of your decision, compare the sidewall treatment before narrowing by brand, because the same size can project a very different character on the car.
What brands make tires for 2017 Infiniti vehicles?
2017 Infiniti sizes are covered by BFGoodrich, Nitto, and Pro-Trac, depending on the exact application. BFGoodrich appears across the widest spread of sizes, including 17-, 19-, and 20-inch fitments. Nitto is available in certain 19- and 20-inch sport sizes, while Pro-Trac appears in the 18-inch and 20-inch applications with more visual sidewall variation.
Brand choice follows size first, not the other way around. A Q50 on 225/55R17 has a different brand mix than a Q70 on 245/50R18, and a staggered Q60 may combine fitments that draw from more than one brand family. Once you confirm the exact size, compare sidewall appearance, speed rating, and load details to decide which option best suits your Infiniti’s intended use.
What is the difference between BFGoodrich g-Force Sport Comp-2 and BFGoodrich g-Force Phenom T/A for the 2017 Infiniti?
For 2017 Infiniti fitments where both appear, BFGoodrich g-Force Sport Comp-2 and BFGoodrich g-Force Phenom T/A share the same basic radial size category but can differ in speed rating and published load details. In 245/40R19, for example, the Sport Comp-2 carries a 98W marking while the Phenom T/A carries 98Y. In 255/40R19 and 265/35R19, the same W-versus-Y distinction appears again, and some Phenom T/A versions also show maximum load figures at 50 psi.
That means the choice is less about raw fitment and more about selecting the product profile you want within the correct size. If you are comparing two BFGoodrich options on the same Infiniti, read the full sidewall code and not just the nominal size. The speed symbol and load information help separate one version from another even when both mount on the same wheel diameter.
Fitting & Setup
What rim width do 2017 Infiniti tires require?
Several 2017 Infiniti sizes include rim width guidance. The 225/55R17 size for the Q50 fits rims from 6.0 to 8.0 inches in most versions, with one whitewall version extending to 9.0 inches. The 245/40R19 size fits 8.0 to 9.5 inches, 255/40R19 fits 8.5 to 10.0 inches, 265/35R19 fits 9.0 to 10.5 inches on the product that publishes a range, and 245/40R20 fits 8.0 to 9.5 inches.
Rim width matters because the same tire size can mount best only within a certain wheel-width window. If your Infiniti has aftermarket wheels or a previous owner changed wheel specs, verify the actual wheel width before choosing a tire. That is especially important on 19-inch staggered Q50 and Q60 setups, where front and rear tires have different width targets even though they share the same rim diameter.
Can the original 2017 Infiniti wheels be used with both tire sizes on the Q70 and Q70L?
No single original 2017 Infiniti Q70 or Q70L wheel can be assumed to work with both sizes, because those models use two different rim diameters: 245/50R18 for 18-inch wheels and 245/40R20 for 20-inch wheels. Tire diameter at the wheel seat is fixed by the final number in the size code, so an 18-inch tire cannot mount on a 20-inch wheel, and a 20-inch tire cannot mount on an 18-inch wheel.
For a Q70 or Q70L owner, the first check is simply reading the wheel diameter already on the car or confirming the size on the existing sidewall. Once that is settled, look at rim width guidance within that same size family. That keeps the search focused on the correct wheel package rather than comparing two sizes that belong to entirely different wheel diameters.
Maintenance, Storage & Longevity
How should I store a 2017 Infiniti when the tires are fitted?
A stored 2017 Infiniti should be kept out of direct sunlight and away from ozone-producing sources such as electric motors, battery chargers, and certain shop equipment. Clean, dry floors and stable temperatures help preserve the tire sidewalls, and the car should be moved periodically so the tires do not sit in one position for months at a time. All of the tire options here are radials, so long-term flat-spotting is generally less of a concern than with old bias-ply tires, but static storage still ages rubber.
If the car will sit for an extended season, keep the tires at proper pressure and inspect them when you bring the Infiniti back into service. Many collectors also use tire cradles or place the car on stands for very long storage intervals, especially with larger wheel packages and lower-profile tires. That extra care helps maintain both appearance and road feel when driving resumes.
How long do tires on a 2017 Infiniti typically last?
Tires on a 2017 Infiniti should be judged by age as much as by tread depth, especially on low-mileage enthusiast cars. A useful rule is to evaluate them closely once they reach about five to seven years old and to treat the ten-year mark as a serious replacement consideration even if they still look presentable. The DOT date code on the sidewall is the quickest way to determine actual tire age.
That approach matters because many luxury and performance cars accumulate miles slowly, which can make aging tires look better than they really are. A Q60 or Q50 that still has deep tread can still ride on hardened rubber, and a Q70 kept mostly for occasional use can do the same. Age, cracking, and loss of flexibility are better warning signs than mileage alone on a collector-minded Infiniti.
How often should tires on a 2017 Infiniti be inspected?
Tires on a 2017 Infiniti deserve a quick inspection before every drive and a more thorough check before any extended outing. Look for sidewall cracking, cuts, punctures, bulges, irregular tread wear, and pressure loss. On the lower-profile 19- and 20-inch sizes especially, curb damage and impact-related sidewall issues are worth watching closely because there is less sidewall height to absorb road shocks.
A short visual walk-around catches many problems before they become roadside issues. If the car has been parked for several weeks, also verify air pressure with a gauge rather than relying on appearance alone. Consistent inspections help you spot alignment wear, age cracking, or a slow leak early, which is especially valuable on an Infiniti that may alternate between commuter duty and longer highway trips.
Safety & Road Use
Are 2017 Infiniti tires safe for highway driving?
2017 Infiniti tire options here are modern radials with W or Y speed ratings depending on the exact size and product. W-rated tires carry a 168 mph ceiling, while Y-rated tires carry a 186+ mph ceiling. Those ratings are well beyond normal highway speeds, so for ordinary road use the more important question is whether the tire is the correct size for the wheel and whether the car’s alignment, suspension, and brake condition are in proper order.
In practical terms, a correctly fitted 17-, 18-, 19-, or 20-inch radial from the proper size family is entirely appropriate for routine highway driving when it is in good condition. A performance sedan or coupe like a 2017 Infiniti can still feel unsettled if tire pressures are wrong or if an old tire has hardened with age. Safe highway use starts with the right fitment, correct inflation, and regular condition checks.
What inflation pressure should I use for 2017 Infiniti tires?
Inflation pressure for a 2017 Infiniti should begin with the factory vehicle placard or owner’s manual, because vehicle makers set pressure around weight distribution, suspension tuning, and intended use. Some tire versions also publish maximum load and pressure figures, such as 225/55R17 up to 1,819 pounds at 50 psi, 245/40R19 up to 1,653 pounds at 50 psi, 255/40R19 up to 1,764 pounds at 50 psi, 265/35R19 up to 1,653 pounds at 50 psi, and 245/40R20 up to 1,709 pounds at 50 psi.
Those figures are tire capacity limits, not a blanket recommendation to run every Infiniti at 50 psi. Use the vehicle’s specified inflation as your baseline, then confirm that the chosen tire is being used within its rated limits. Do not transfer a pressure number from one size to another, because a Q50 on 225/55R17 and a Q70 on 245/40R20 are different applications with different tire dimensions.
What should I check before taking a 2017 Infiniti on a longer drive?
Before a longer trip in a 2017 Infiniti, inspect all four tires for cracking, cuts, bulges, punctures, and uneven wear, then verify cold inflation pressure with a gauge. Check tread depth across the width of each tire, look for any sidewall damage from potholes or curbs, and make sure the spare is present and serviceable if your specific car carries one. A long-wheelbase Q70L and a sport-oriented Q60 put different demands on tires, but the inspection routine is the same.
The tire check should be part of a broader pre-drive review that includes brakes, fluids, battery condition, and suspension behavior. On 19-inch staggered setups, confirm that front and rear sizes have not been accidentally swapped in past service. Spending a few minutes on those basics helps the car track properly, ride as intended, and avoid the kind of preventable problem that can spoil a road trip.
