2015 Infiniti Q40 Tires

The 2015 Infiniti Q40 uses a 225/55R17 radial tire. That is the primary fitment for the covered vehicle and it is the same size used on the Q40 Base configuration, which keeps the fitment question fairly simple compared with vehicles that split sizes by trim or wheel package.

The next step is making sure the car still has the correct 17-inch wheel setup and has not been changed to an aftermarket wheel or different suspension height. Once the size is confirmed, selection comes down to tire type and appearance, including performance-oriented blackwalls or specialty sidewall styles in the same 225/55R17 size.

The primary tire fitment for the 2015 Infiniti Q40 is built around a 17-inch rim. The 225/55R17 size itself confirms that wheel diameter, and the available tires in this fitment are all intended for 17-inch applications rather than a different rim diameter.

Wheel diameter is only part of the fitment picture, so it also helps to check the actual wheel width on the car before choosing among available tires. Product specifications in this size span compatible rim widths from 6 to 9 inches, depending on the tire series, which is why matching the tire to the wheel matters as much as matching the 17-inch diameter.

Yes. The 2015 Infiniti Q40 Base uses the same 225/55R17 radial size as the core fitment for this model year. That makes sub-model selection more straightforward than on vehicles where trim level or package changes move the car to a different wheel diameter or tire profile.

Even with shared fitment, it is still smart to check the car itself before replacement, especially if the wheels were changed by a previous owner. Confirming the current tire size, wheel diameter, and wheel width helps prevent ordering the correct size for the model but the wrong setup for a modified or altered individual vehicle.

Start with the correct primary size, 225/55R17, and make sure the tire matches the car’s 17-inch wheel. From there, the biggest differences are tire character and presentation, including BFGoodrich g-Force series blackwall options for a more contemporary sport-sedan look and Silvertown Radial choices for a more distinctive visual style.

Wheel-width compatibility is also worth checking because the available tires do not all share the same rim-width range. Some fit 6 to 8 inch wheels, while others extend to 9 inches, so the better choice depends on the actual wheel on the car as well as whether the goal is everyday driving feel, sporty appearance, or a custom-style sidewall treatment.

The 2015 Infiniti Q40’s 225/55R17 fitment is available in several sidewall styles, including blackwall, wide whitewall, and redline. Blackwall options appear in the BFGoodrich g-Force series, while wide whitewall and redline treatments are available in the BFGoodrich Silvertown Radial line.

That makes sidewall choice one of the most visible selection points for this car. A blackwall tire keeps the appearance closer to a modern sport sedan, while a wide whitewall or redline shifts the car toward a more individualized or nostalgic presentation. The right pick depends on the look you want without moving away from the correct primary size.

Available 225/55R17 tires for the 2015 Infiniti Q40 include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Silvertown Radial. Those series create a meaningful spread between contemporary performance-oriented tires and specialty appearance-focused radials in the same core fitment.

Series choice matters because it helps narrow the tire’s overall character before looking deeper at weight, load figures, sidewall style, or wheel-width range. A Q40 used as a regular road car may call for a different presentation than one being built around a specific visual theme, even though both still use the same 225/55R17 size.

A period-style approach for a 2015 Infiniti Q40 usually starts by staying with the correct 225/55R17 size and 17-inch wheel fitment. From there, the appearance decision becomes more important, with blackwall tires preserving a contemporary sport-luxury look and Silvertown Radial options offering more visual character through whitewall or redline sidewalls.

Because this is a modern-era vehicle, exact appearance goals can vary widely between stock-style preservation and custom presentation. Buyers focused on faithful year-specific detail should compare the current setup on the car with original sales literature, marque references, or other vehicle-specific documentation before choosing a sidewall treatment that changes the visual tone.

Construction is simple on the 2015 Infiniti Q40 because the primary fitment is radial. Since the size does not branch into a bias-ply choice, appearance is shaped less by construction type and more by the tire series and sidewall treatment selected within the correct 225/55R17 radial format.

That means the visual difference comes from choices such as blackwall, wide whitewall, or redline rather than from switching between vintage and modern construction styles. Keeping the original size and wheel diameter intact usually has the strongest effect on preserving the car’s stance, while sidewall treatment fine-tunes whether the finished look feels understated, sporty, or more custom.

Yes. A 2015 Infiniti Q40 may have left the factory using 225/55R17 tires on 17-inch wheels, but aftermarket wheels, altered offsets, suspension changes, or lowering can change what actually works on the individual car. Even when the tire size remains the same, wheel width and clearance can shift the fitment outcome.

Checking the current setup on the car is the safest approach before replacement. Measure the installed wheel diameter and width, look for rubbing marks at the fenders or inner suspension areas, and make sure the steering turns freely lock to lock. Those checks matter most when the car has had any wheel, brake, or ride-height changes.

Before regular road use, inspect the wheel condition, confirm the 17-inch rim size, and make sure each tire is the correct 225/55R17 fitment. It also helps to check for proper inflation, valve-stem condition, and any obvious alignment or suspension problems that could shorten tire life or affect how the car feels on the road.

A quick undercar inspection is worthwhile on a sport sedan like the Q40 because worn suspension parts can mask the benefit of a new tire. Look for uneven wear, steering pull, vibration, or clearance issues during the first drives, then recheck air pressure after the tires have settled into service on the car.

Tires on a 2015 Infiniti Q40 should be inspected regularly, not just when tread appears low. A visual check for cuts, punctures, sidewall damage, cracking, and uneven wear is sensible throughout the year, especially on a car that may alternate between daily use and longer periods of limited driving.

Inspection should also follow any impact, vibration, or handling change that feels different from normal. Monitoring air pressure, tread wear pattern, and the wheel’s condition helps catch problems before they become more expensive or affect road manners. Cars that sit for extended periods deserve extra attention because low use can hide aging or air-loss issues.