The 2015 Infiniti Q50 sits at an interesting point in Infiniti’s sport-luxury sedan story, blending sharp styling, rear-drive dynamics, and a modern chassis with trim levels that range from everyday touring to more aggressive sport setups. Tire selection matters here because the Q50 does not rely on just one fitment across the lineup. Depending on sub-model, it uses 225/55R17, 245/40R19, or a staggered 19-inch sport arrangement with 245/40R19 front and 265/35R19 rear. That opens the door to different tire series, sidewall presentations, and performance-oriented choices. The key is matching the exact sub-model and wheel setup before comparing appearance, construction details, and road-use priorities.
Which Tire Size Is Right for The 2015 Infiniti Q50
The 2015 Infiniti Q50 uses three primary tire sizes, and the correct one depends on the exact sub-model and wheel setup. Some versions use a 17-inch radial, others use a 19-inch radial, and the Performance Package setup adds a staggered front-and-rear arrangement. Before choosing a tire, confirm whether the car has 17-inch or 19-inch wheels and whether it uses the Sport w/Performance Pkg. front and rear combination.
225/55R17 is a metric radial size in which 225 identifies nominal section width in millimeters, 55 is the aspect ratio, R indicates radial construction, and 17 is the wheel diameter in inches. On the 2015 Infiniti Q50, this size suits the 17-inch wheel setup used on select trims with a more standard fitment. Available choices include BFGoodrich performance-oriented g-Force series along with Silvertown Radial options in blackwall, wide whitewall, and redline styles. This size is the one to evaluate when the goal is retaining the 17-inch setup while choosing between a contemporary look and a more appearance-driven presentation.
Fit(s): Hybrid Premium, Hybrid Sport, Premium, Sport, and Sport w/Performance Pkg. Front
Construction: Radial|Rim: 19 in
245/40R19 is a metric radial size with a 245-millimeter nominal section width, a 40-series profile, radial construction, and a 19-inch rim diameter. For the 2015 Infiniti Q50, it appears on several sport-oriented 19-inch applications and also serves as the front size on the Sport w/Performance Pkg. setup. BFGoodrich offers this size in g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A lines, all with blackwall styling. This fitment is the right place to focus when the car already wears 19-inch wheels and the priority is matching the intended front or all-around sport setup.
265/35R19 is a metric radial size where 265 is the nominal section width in millimeters, 35 is the aspect ratio, R denotes radial construction, and 19 is the wheel diameter. On the 2015 Infiniti Q50, this size is used as the rear tire in the Sport w/Performance Pkg. staggered arrangement rather than as a universal fitment across the model line. Choices include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2, all in blackwall form. This is the size to confirm when maintaining the wider rear stance of the Performance Package rather than converting to a square setup.
Sub-model fitment on the 2015 Infiniti Q50 varies by trim and wheel package, so tire choice is not the same across the full lineup. Checking the exact sub-model matters first, especially when comparing 17-inch configurations, 19-inch sport fitments, and the staggered Performance Package arrangement.
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2015 Infiniti Q50 Base
The 2015 Infiniti Q50 Base uses the 225/55R17 radial fitment on a 17-inch wheel. Tire selection here centers on staying with the correct 17-inch size while choosing between performance-oriented blackwall options and more appearance-focused sidewall treatments.
The 2015 Infiniti Q50 Hybrid Premium can use either 225/55R17 or 245/40R19, depending on the wheel setup on the car. Confirming whether it wears 17-inch or 19-inch wheels is the first step before comparing tire series, sidewall style, and overall tire character.
The 2015 Infiniti Q50 Hybrid Sport uses the 245/40R19 radial size. That keeps the decision focused on selecting among the available 19-inch blackwall performance tire lines rather than sorting through multiple primary fitments.
The 2015 Infiniti Q50 Premium can be fitted with either 225/55R17 or 245/40R19, depending on the wheel package installed. The practical step is verifying wheel diameter first, then choosing the tire style and series that best match the car’s actual setup and intended use.
The 2015 Infiniti Q50 Sport uses the 245/40R19 radial fitment. That makes the choice more about comparing available 19-inch sport tire lines and confirming that the car has retained its intended wheel setup.
The front position of the 2015 Infiniti Q50 Sport w/Performance Pkg. uses 245/40R19. Selecting tires for this configuration means preserving the correct front size within the staggered arrangement and avoiding assumptions based on non-Performance Package Q50 trims.
The rear position of the 2015 Infiniti Q50 Sport w/Performance Pkg. uses the wider 265/35R19 size. Tire selection should respect that staggered rear fitment and confirm wheel width and rear clearance before making any change to the existing setup.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2015 Infiniti Q50 Tires for Sale
Available 2015 Infiniti Q50 tire choices center on 225/55R17, 245/40R19, and 265/35R19 radial fitments from BFGoodrich and Nitto. Depending on size, the product grid lets you compare g-Force and Phenom series performance tires, along with select 17-inch wide whitewall and redline Silvertown Radial options.
Common 2015 Infiniti Q50 tire questions usually come down to the exact size for the trim, whether the car has 17-inch or 19-inch wheels, and how to compare available tire series, sidewall styles, and staggered sport fitments.
Tire Size & Fitment
What tire size fits a 2015 Infiniti Q50?
The 2015 Infiniti Q50 uses three primary tire sizes: 225/55R17, 245/40R19, and 265/35R19. The correct size depends on the exact sub-model and wheel package. Base models use 225/55R17, several Sport and Hybrid trims use 245/40R19, and the Sport w/Performance Pkg. uses a staggered setup with 245/40R19 in front and 265/35R19 in the rear.
That means the first step is identifying the trim and confirming the wheel diameter already on the car. A Q50 with 17-inch wheels should not be treated the same as one with 19-inch wheels, and the Performance Package rear fitment needs to be checked separately so the staggered layout is preserved.
What size rim does a 2015 Infiniti Q50 use?
The 2015 Infiniti Q50 uses either a 17-inch or 19-inch rim, depending on sub-model and wheel package. The 225/55R17 size fits a 17-inch wheel, while both 245/40R19 and 265/35R19 fit 19-inch wheels. The staggered Sport w/Performance Pkg. setup keeps the same 19-inch diameter front and rear but changes tire width and profile.
Wheel diameter is the first thing to verify before selecting tires, especially on Premium and Hybrid Premium cars that can appear with more than one fitment. Checking wheel width also matters when comparing products, since some tires within the same nominal size are intended for different rim-width ranges.
Do all 2015 Infiniti Q50 sub-models use the same tire size?
No, 2015 Infiniti Q50 sub-models do not all use the same tire size. The Base uses 225/55R17, the Sport and Hybrid Sport use 245/40R19, Premium and Hybrid Premium can use either 225/55R17 or 245/40R19, and the Sport w/Performance Pkg. adds a staggered 245/40R19 front and 265/35R19 rear arrangement.
That variation means tire shopping should start with the exact trim and the actual wheels on the car, not just the model name. A quick visual check of sidewall size markings and wheel diameter helps prevent mixing 17-inch and 19-inch fitments or ordering only one half of a staggered package.
Choosing the Right Tire
What should I consider when choosing a 2015 Infiniti Q50 tire?
Start with the correct size for the exact Q50 trim and wheel setup, then compare the construction and character of the available tire lines. The 2015 Infiniti Q50 uses radial tires only, but the product mix still varies by size, series, sidewall treatment, rim-width compatibility, weight, and in some cases load capacity.
Once the fitment is confirmed, the real decision becomes matching the tire to the car’s purpose. A standard 17-inch setup may allow more appearance variety, while the 19-inch sport sizes keep the focus on blackwall performance-oriented choices. Staggered cars also need front and rear sizes kept in proper balance.
What sidewall styles are available for 2015 Infiniti Q50 tires?
Sidewall style depends on the tire size. In 225/55R17, the 2015 Infiniti Q50 has blackwall, wide whitewall, and redline options. In 245/40R19 and 265/35R19, the available tires are blackwall. That makes the 17-inch fitment the only one with meaningful appearance variation beyond tire series alone.
Choosing a sidewall style should follow the actual wheel package on the car. A Base or 17-inch Premium setup can explore whitewall or redline looks, while 19-inch Sport-oriented trims remain focused on blackwall presentation. The right choice depends on whether the goal is a contemporary look or a more distinctive custom appearance.
What brands offer tires for the 2015 Infiniti Q50?
BFGoodrich appears across all three primary 2015 Infiniti Q50 sizes, with g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Silvertown Radial offerings depending on fitment. Nitto also appears in 265/35R19 through the NT555 G2, which is tied to the wider rear sport application rather than the full Q50 range.
Brand comparison should still begin with size and wheel setup, since not every brand or series is offered in every Q50 fitment. A 17-inch car has different styling choices than a 19-inch sport car, and a staggered Performance Package setup narrows the field further by separating front and rear requirements.
Restoration & Appearance
Which tire should I choose for a period-style 2015 Infiniti Q50?
A period-style approach for a 2015 Infiniti Q50 starts with keeping the correct original-size relationship for the trim and wheel package already on the car. Among the available options, 225/55R17 offers the most appearance flexibility, including Silvertown Radial versions with wide whitewall and redline sidewalls, while the 19-inch sport sizes remain blackwall-oriented.
The best choice depends on whether the car is being preserved in a clean stock-looking presentation or given a more personalized show-oriented look. Size and wheel diameter should stay correct first, because even an attractive sidewall treatment will look out of place if it is mounted on the wrong Q50 fitment.
How does tire construction affect the appearance of a restored 2015 Infiniti Q50?
Construction is straightforward on the 2015 Infiniti Q50 because its primary fitments are radial across the board. Appearance differences come less from bias-ply versus radial choices and more from sidewall treatment, tire series, and whether the car is on 17-inch or 19-inch wheels. That is especially noticeable because only the 17-inch size includes whitewall and redline options.
For a restoration-oriented or show-focused build, the visual effect of the tire can change the character of the car even when the size remains correct. A blackwall keeps a modern sport-sedan look, while a wide whitewall or redline creates a more customized presentation that should be matched carefully to the vehicle’s overall theme.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 Infiniti Q50?
Yes, modifications can affect tire fitment on a 2015 Infiniti Q50 even when the tire size itself is correct for a factory wheel package. Aftermarket wheels can change width and offset, and suspension changes can alter available clearance. Those issues matter most on 19-inch cars and on the staggered Sport w/Performance Pkg. setup.
A modified Q50 should be checked for wheel diameter, wheel width, inner and outer clearance, and front-to-rear size relationship before new tires are chosen. Lowered suspension, alignment changes, or body modifications can all influence whether the intended size still clears properly during turning, compression, and normal road use.
What should I inspect before driving a 2015 Infiniti Q50 on new tires?
Before driving a 2015 Infiniti Q50 on new tires, inspect the wheels for the correct diameter and condition, verify that front and rear sizes match the intended setup, and confirm proper inflation. It also helps to look over the suspension and alignment condition, since uneven wear or loose components can affect how a fresh set of tires behaves.
A short clearance check is worthwhile, especially on 19-inch and staggered cars. Turn the steering from lock to lock, look for rubbing points, and make sure the tires seat correctly on the wheels. After the first miles, recheck pressure and inspect for any signs of contact, vibration, or irregular wear.
What should I check before a longer drive in a 2015 Infiniti Q50?
Before a longer drive in a 2015 Infiniti Q50, confirm that the car is wearing the correct tire sizes for its trim and wheel setup, then inspect pressure, tread condition, and sidewalls for cuts, bulges, cracking, or air loss. On a Performance Package car, make sure the 245/40R19 front and 265/35R19 rear arrangement has been maintained.
It is also smart to check wheel fastener torque, alignment feel, and any signs of rubbing that may appear under load. A Q50 with aftermarket wheels or suspension changes deserves extra attention, since a setup that looks acceptable parked can still create clearance or wear issues during extended highway driving.
