2014 Infiniti Tire Fitment Guide

2014 Infiniti vehicles use seven sizes across three models. The Q50 uses 225/55R17 or 245/40R19, the Q60 uses 225/45R19, 225/50R18, 245/40R19, or 245/45R18, and the Q70 uses 245/40R20 or 245/50R18. All are radial sizes, and rim diameters span 17, 18, 19, and 20 inches. Rim width recommendations vary by size, including 6.0-8.0 inches for 225/55R17 and 225/50R18, 7.0-8.5 inches for 225/45R19, 7.5-9.0 inches for 245/45R18, and 8.0-9.5 inches for 245/40R19 and some 245/40R20 products.

That means year and make alone are not enough for a correct tire choice on 2014 Infiniti vehicles. Start by identifying whether you have a Q50, Q60, or Q70, then confirm whether the car is on its original wheel diameter or a different package. Once the size is settled, you can narrow the choice by sidewall appearance, brand, and speed rating rather than trying to compare unlike fitments.

On a 2014 Infiniti, 225/55R17 is a metric radial size. The 225 is the nominal section width in millimeters, 55 is the aspect ratio, the R identifies radial construction, and 17 is the wheel diameter in inches. On 2014 Infiniti applications, this size belongs to the Q50 and fits a 17-inch wheel, with products covering rim widths from 6.0 to 9.0 inches depending on the tire.

That decoding matters because 225/55R17 is not interchangeable with the 19-inch sizes used elsewhere in the 2014 Infiniti range. Even if two tires seem close in width, the wheel diameter must match exactly. If your Q50 has 17-inch wheels, this size keeps you in the proper diameter family, after which you can choose between blackwall and wide whitewall styling and compare load ratings where relevant.

No. 2014 Infiniti models do not share one universal tire size. Only 245/40R19 crosses over between the Q50 and Q60, while 225/55R17 is Q50-only, 225/45R19 and 225/50R18 and 245/45R18 are Q60-only, and 245/40R20 and 245/50R18 are Q70-only. The range also spans four wheel diameters, so the fitment differences are substantial rather than cosmetic.

For buyers, that means model identification is the first checkpoint, especially on the Q60 where both 18-inch and 19-inch setups appear in two widths. If the car has changed hands or has aftermarket wheels, verify the tire sidewall and actual wheel diameter before choosing a replacement. That simple step prevents moving into the wrong fitment family and saves time when comparing brands and product lines.

Sidewall style varies quite a bit across 2014 Infiniti sizes. Most sizes are offered in Blackwall form, including 245/40R19, 225/45R19, 225/50R18, and 245/45R18. The 225/55R17 for the Q50 also appears in a Wide Whitewall version, while 245/40R20 for the Q70 is available in Blackwall and RWL, and 245/50R18 for the Q70 comes in RWL and Redline styles.

A plain blackwall is the most natural visual fit for a 2014 luxury-performance Infiniti, especially if the goal is a modern factory-like appearance. The whitewall, redline, and raised white letter options are more about custom style than late-model OE character. If appearance matters as much as fitment, decide on the sidewall treatment early, because some sizes offer only one look while others give you room to personalize the car.

BFGoodrich covers most of the 2014 Infiniti range, including 225/55R17, 245/40R19, 225/45R19, 225/50R18, 245/45R18, and 245/40R20. Nitto appears in 245/45R18 and 245/40R20, while Pro-Trac is available in 245/40R20 and 245/50R18. Brand choice therefore depends partly on the exact size, because some fitments have one-brand coverage and others open up to two or three brands.

That pattern is useful when narrowing a search. If your 2014 Infiniti uses one of the Q60 or Q70 sizes with broader brand coverage, you can compare sidewall style and speed rating within the correct fitment. If your size is covered only by BFGoodrich or only by Pro-Trac, the decision shifts away from brand shopping and toward choosing the product line and appearance that best suits how your car is used.

On several 2014 Infiniti sizes, both the BFGoodrich g-Force Sport Comp-2 and BFGoodrich g-Force Phenom T/A are available in Blackwall radial form, but their ratings and capacities can differ. In 245/40R19, for example, the Sport Comp-2 carries a 98W rating while the Phenom T/A carries a 98Y rating; in 245/45R18, the Sport Comp-2 appears as 96W while the Phenom T/A is 100Y. Load figures also vary by size and series, so the two are not simply interchangeable by name.

For a 2014 Infiniti owner, that means the smarter comparison is not just series-to-series but size-specific series-to-series. Look at the exact sidewall code, speed letter, and load rating on the product you are considering, especially if the car sees high-speed interstate use or carries extra load. When two choices share the same size, those details tell you more than the branding alone.

Rim width depends on the exact 2014 Infiniti tire size. 225/55R17 and 225/50R18 fit 6.0 to 8.0-inch rims, while 225/45R19 fits 7.0 to 8.5-inch rims. The wider sizes step up accordingly: 245/45R18 fits 7.5 to 9.0-inch rims, and 245/40R19 fits 8.0 to 9.5-inch rims. Some 245/40R20 products also specify 8.0 to 9.5-inch rims.

That range is why wheel confirmation matters before replacing tires on a 2014 Infiniti, especially if the car has aftermarket wheels. Two tires may share the same wheel diameter but still call for different rim widths because of section width and profile. Match the tire to the actual wheel on the car, and avoid assuming that every 18-inch or 19-inch Infiniti wheel is suitable for every tire in that diameter.

The 2014 Infiniti sizes here are modern radial fitments, and none of the product markings indicate tube-type construction. The tire markings use standard radial size conventions such as 225/55R17, 245/40ZR19, and 245/45ZR18, without TT notation. That points buyers toward tubeless radial products for these applications rather than tube-type collector-car fitments.

Even so, the wheel itself still matters. If a 2014 Infiniti is on original late-model tubeless wheels, staying with tubeless radial tires is the normal path. If the car has custom wheels, confirm the wheel manufacturer’s requirements and inspect the valve stems at the same time. A proper air-retention setup depends on the wheel condition and hardware just as much as the tire sidewall marking.

A 2014 Infiniti should be stored in a cool, dry, shaded space with the tires kept away from direct sunlight, electric motors, welders, battery chargers, and other ozone sources that accelerate rubber aging. Keep the tires properly inflated and move the car periodically so one section of tread is not carrying the load for months at a time. Clean, stable concrete or another dry surface is better than damp ground or bare soil.

Good storage habits help preserve both appearance and ride quality, especially on the lower-profile 18-, 19-, and 20-inch fitments used across the 2014 Infiniti range. If the car will sit for a long season, some owners use tire cradles or stands to reduce static stress. A quick pressure check before and after storage is worthwhile, since gradual air loss can go unnoticed on a collector or second car.

On a 2014 Infiniti, tire age usually matters more than mileage alone, especially if the car is driven occasionally rather than daily. A practical rule is to begin evaluating tires closely around five to seven years of age and to treat around ten years as a serious replacement point regardless of remaining tread. The DOT date code on the sidewall gives the tire’s week and year of manufacture.

That approach is especially useful for cars like a 2014 Infiniti Q50, Q60, or Q70 that may look fine cosmetically while the rubber has already hardened with time. A tire with ample tread can still be a poor choice for continued service if age cracking, repeated pressure loss, or stiffness has set in. Use tread depth as only one part of the decision, not the whole decision.

Tires on a 2014 Infiniti deserve a quick inspection before every drive and a more careful check before any extended highway trip. Look for sidewall cracking, punctures, bulges, uneven wear, and any sign that the tire has been run low on air. Check pressures when the tires are cold, and make sure the valve stems are in good condition and sealing properly.

Routine inspections are especially important on low-profile 19-inch and 20-inch tires, where impact damage from potholes can be easier to miss at a glance. If one tire repeatedly loses pressure, inspect the wheel and valve hardware rather than assuming the tread is the problem. Keeping an eye on wear patterns also helps catch alignment or suspension issues before they shorten the life of a new set.

A 2014 Infiniti Q50 would have been fitted with modern radial tires from the factory, not vintage bias-ply construction. Within the 2014 Infiniti range, the Q50 uses either 225/55R17 or 245/40R19 depending on wheel package, which reflects the car’s contemporary luxury-sport positioning. Original-equipment branding can vary by market and package, so size, load, speed category, and overall appearance are the more important authenticity checkpoints.

For an owner who wants the car to present correctly, the first goal is matching the proper size and wheel diameter for the exact Q50 configuration. A plain blackwall radial will usually stay closest to the late-model factory look, while a wide whitewall option is more of a personalization choice. If you are pursuing marque-level accuracy, compare the car against period brochures, window sticker information, or Infiniti enthusiast resources.

Yes, correct tire fitment matters when showing a 2014 Infiniti, even though it is a modern-era collector rather than a prewar or muscle-era restoration. Judges and knowledgeable enthusiasts will notice if the wheel diameter, size, profile, or sidewall treatment looks out of place for the model. On a 2014 Infiniti, an incorrect 18-inch tire on a car meant for a 19-inch package, or an aggressively custom sidewall on a stock presentation, can change the car’s visual authenticity.

The practical takeaway is to decide whether your goal is factory-correct presentation or personalized style. For a stock-minded Q50, Q60, or Q70, a blackwall radial in the proper size will usually look most at home. If the car is headed to marque-specific events, check event standards and enthusiast forums beforehand, because modern luxury cars can still be judged closely on details that enthusiasts notice immediately.

For 2014 Infiniti fitments, Pro-Trac Street Pro III appears with different sidewall treatments depending on size. In 245/40R20, the tire is available with RWL styling, while 245/50R18 appears in both RWL and Redline versions. The construction remains radial, so the distinction is visual rather than a shift to a different tire type or a different wheel diameter.

That makes the choice mainly about the personality you want the Q70 to project. Raised white letters create a more assertive, performance-oriented custom look, while a redline gives a more stylized accent that stands apart from late-model factory convention. If the goal is a stock appearance, a plain blackwall alternative usually stays truer to how a 2014 Infiniti would have looked when new.

The 2014 Infiniti sizes here are all modern radial designs, and the products carry W or Y speed ratings where that information appears. W is rated to 168 mph and Y is rated to 186-plus mph, which places these tires well above normal U.S. highway speeds. In ordinary use, the vehicle’s alignment condition, suspension health, brake condition, and the age of the tire are likely to matter more than the published speed ceiling.

Highway suitability still depends on using the correct size, maintaining proper inflation, and avoiding old or damaged tires. A 2014 Infiniti with fresh, correctly fitted radials in good condition is operating within the kind of tire technology it was designed around. Before a long interstate run, verify pressure and inspect for cuts, bubbles, or uneven wear so the tire’s real-world condition matches its rating on paper.

Inflation pressure on a 2014 Infiniti should start with the factory vehicle placard or owner’s manual for the exact model and wheel package, because vehicle engineers set pressure around weight distribution, ride, and handling. Tire-side maximum figures are not a universal running-pressure recommendation, but they do show the pressure associated with a given load capacity on some products. Examples include 225/55R17 up to 1,819 pounds at 50 psi, 245/40R19 up to 1,653 pounds at 50 psi, 225/45R19 up to 1,565 pounds at 50 psi, 225/50R18 up to 1,709 pounds at 50 psi, 245/45R18 up to 1,764 pounds at 50 psi, and 245/40R20 up to 1,709 pounds at 50 psi.

Use those figures as tire-capacity references, not as an across-the-board inflation target. The right everyday pressure for a Q50, Q60, or Q70 can differ even when two cars share a size. If you are replacing one brand with another in the same size, confirm both the car’s placard and the tire maker’s guidance, then fine-tune only within that framework rather than copying a number from another Infiniti fitment.

Before taking a 2014 Infiniti on a longer drive, inspect each tire for cracking, cuts, punctures, bulges, irregular wear, and signs of previous impact damage. Check cold inflation pressure, verify that the valve stems are sound, and make sure the spare is usable if the car still carries one. On cars with larger 19-inch or 20-inch packages, pay extra attention to sidewall condition after rough-road or pothole use.

Tires are only one part of a broader pre-trip check on a modern collector or enthusiast car. It also makes sense to confirm alignment feel, brake response, fluid levels, and whether the car has been sitting long enough for the tires to lose pressure or develop vibration. A careful inspection before departure is far easier than trying to sort out a preventable problem on the shoulder of the interstate.