2020 Infiniti Tire Fitment Guide

2020 Infiniti vehicles use seven sizes across two model lines. The Q50 uses 225/55R17, 225/50R18, 245/40R19, and 265/35R19, while the Q60 uses 255/40R19, 255/35R20, and 275/30R20. Rim diameters are 17, 18, 19, or 20 inches depending on the application. Where rim-width guidance is available, 225/55R17 fits 6.0 to 9.0-inch rims depending on product, 225/50R18 fits 6.0 to 8.0, 245/40R19 fits 8.0 to 9.5, 255/40R19 and 255/35R20 fit 8.5 to 10.0, and 265/35R19 fits 9.0 to 10.5.

The practical takeaway is that year and make alone are not enough for a 2020 Infiniti. Start with the model, then confirm the wheel diameter already on the car, and finally check whether you are dealing with the front or rear axle on a staggered setup. That matters most on 19- and 20-inch sport packages, where wider rear tires can look similar at a glance but are not interchangeable with the narrower mates.

On a 2020 Infiniti, 245/40R19 is a metric radial size. The 245 is the nominal section width in millimeters, 40 is the aspect ratio, R means radial construction, and 19 is the wheel diameter in inches. For 2020 Infiniti fitment, this size belongs to Q50 applications and mounts on 19-inch wheels. Available versions in this size are Blackwall radials from BFGoodrich, with W- and Y-rated options.

That decoding helps you avoid mixing up a 19-inch Q50 tire with the wider 19-inch or 20-inch sizes used elsewhere in the lineup. Even when two sizes share the same wheel diameter, the width and profile are different enough to affect fitment and balance across the car. If your sidewall reads 245/40R19, stay with that exact size unless you are intentionally re-engineering the wheel and tire package.

No, 2020 Infiniti models do not share one universal tire size. The Q50 and Q60 use different size groups, and each model can appear with more than one wheel diameter depending on its factory package. The Q50 ranges from 17 to 19 inches, while the Q60 ranges from 19 to 20 inches. Some applications also use wider companion sizes that point to a staggered arrangement rather than four identical tires.

That means a buyer should identify the model before doing anything else, then read the sidewall on the car or verify the wheel diameter directly. A Q50 owner looking at a 19-inch tire still needs to know whether the car uses the 245/40R19 or the wider 265/35R19. A Q60 owner faces the same issue with 255/35R20 and 275/30R20, where front and rear positions are not the same.

Most 2020 Infiniti tire sizes here are available as Blackwall radials, which suits the modern sport-luxury character of the Q50 and Q60. One exception stands out: 225/55R17 for the Q50 is also available as a BFGoodrich Silvertown Radial with a 1.50-inch Wide Whitewall. That makes sidewall choice much broader in that single size than in the rest of the lineup, where the appearance stays contemporary and understated.

For most owners, Blackwall is the natural visual match for a 2020 Infiniti. The whitewall option is more of a styling statement than an authenticity play on a late-model Infiniti, so it appeals to buyers building a custom look rather than preserving factory-correct appearance. If appearance matters as much as fitment, 225/55R17 deserves extra attention because it is the only size in this lineup that opens that styling door.

BFGoodrich covers every size in the 2020 Infiniti range shown here, while Nitto appears in 265/35R19, 255/35R20, and 275/30R20. The Q50's 17-, 18-, and 245-width 19-inch sizes are BFGoodrich-only, while the wider Q50 265/35R19 and the Q60's 20-inch fitments bring in Nitto as an additional option. Within BFGoodrich, the available series include g-Force Comp-2 A/S, g-Force Sport Comp-2, g-Force Phenom T/A, and in one size, Silvertown Radial.

Brand choice matters most when you are balancing appearance, speed rating, and the exact size your car requires. If you own a Q60 on 20s or a Q50 with the wider 19-inch rear fitment, you have more than one brand to compare. If your Infiniti uses one of the narrower sedan sizes, the decision is more about series and sidewall style within BFGoodrich than about crossing between manufacturers.

For several 2020 Infiniti sizes, both BFGoodrich g-Force Sport Comp-2 and BFGoodrich g-Force Phenom T/A are available in the same basic fitment. In 245/40R19, the Sport Comp-2 carries a 98W rating and the Phenom T/A carries a 98Y rating, with both fitting 8.0 to 9.5-inch rims and weighing about 28 pounds. In 255/35R20, the Sport Comp-2 is 97W at about 29 pounds, while the Phenom T/A is 97Y at about 27.93 pounds. In 255/40R19, the Sport Comp-2 is 100W and the Phenom T/A is 100Y, both for 8.5 to 10.0-inch rims.

The buying implication is straightforward: these two series can overlap closely on fitment, but they are not identical in speed rating and can differ slightly in weight. If you are comparing them for a Q50 or Q60, use the exact tire size as your starting point and then decide whether the higher speed rating in the Phenom T/A matters for your intended use. That keeps the comparison rooted in measurable differences rather than appearance alone.

Rim-width guidance for 2020 Infiniti tires varies by size. 225/50R18 fits 6.0 to 8.0-inch rims, 225/55R17 fits 6.0 to 8.0 inches in most products and up to 9.0 inches in the whitewall radial, 245/40R19 fits 8.0 to 9.5, 255/40R19 fits 8.5 to 10.0, 255/35R20 fits 8.5 to 10.0, and 265/35R19 fits 9.0 to 10.5. Those ranges are tied to the specific tire size and should not be carried over to another size just because the wheel diameter matches.

This is especially important on Q50 and Q60 applications that use multiple 19-inch or 20-inch sizes. Two tires may both fit the same diameter wheel, yet need different rim widths to sit correctly and perform as intended. Before choosing a replacement, confirm the actual wheel width stamped on the wheel or verify it through the wheel manufacturer so the tire size and wheel dimensions work together.

The 2020 Infiniti tires here are tubeless radials. One 255/40R19 product explicitly carries a TL tubeless marking in the size string, and none of the other sizes show TT tube-type markings. That aligns with what you would expect from late-model Infiniti fitments using modern radial performance tires on contemporary wheels. Inner tubes are not part of the normal setup for these sizes.

For owners, that means the focus should be on wheel condition, valve stems, bead seating, and pressure retention rather than tube selection. If you are working with original factory wheels, inspect the bead seats for damage or corrosion before mounting fresh tires. Tube-related questions generally belong to much older applications, not to the Q50 and Q60 sizes used across the 2020 Infiniti range.

Original 2020 Infiniti wheels can only be used with tire sizes that match their diameter and appropriate width range. A 17-inch wheel takes a 17-inch tire, an 18-inch wheel takes an 18-inch tire, and the same rule applies to 19- and 20-inch wheels. Within those diameters, width compatibility still matters, especially as the sizes get wider. The Q50 and Q60 ranges include multiple 19- and 20-inch sizes that are not interchangeable simply because the diameter matches.

That matters most on cars with staggered fitment, where the rear wheel is often wider than the front. If your Q60 uses 255/35R20 and 275/30R20, for example, the original wheels may both be 20-inch pieces but still be different widths. Confirm wheel diameter first, then verify the wheel width before assuming one size can be swapped across all four corners.

A stored 2020 Infiniti should be kept clean, dry, and out of direct sunlight, with the tires away from electric motors, battery chargers, welders, and other ozone-producing equipment. Inflate the tires to a sensible storage pressure within the manufacturer's guidance and move the car occasionally so the same contact patch does not sit in one place for months. Modern radials resist flat-spotting better than older bias-ply designs, but they still age faster when exposed to heat, UV, and long-term static loading.

If the car will sit for an extended season, many owners use tire cradles or stands to reduce stress at the contact patch. That is especially useful on low-profile Q50 and Q60 fitments, where short sidewalls give less cushion during long stationary periods. Good storage habits protect both appearance and road manners, which matters just as much on a weekend-driven modern Infiniti as it does on an older collector car.

On a 2020 Infiniti, tire age usually matters more than mileage once the car becomes a low-use enthusiast vehicle. A sensible rule is to start evaluating tires closely at five to seven years from their DOT date code and to treat around ten years as the point where replacement deserves serious consideration, even if tread remains. Heat cycles, storage conditions, and exposure to sunlight can shorten useful life, especially on performance-oriented low-profile radials.

That means a lightly driven Q50 or Q60 can still need tires that look only partly worn. Check the DOT date code on each tire, not just the ones that are easiest to see, because replacements may not all have been installed at the same time. Age, cracking, hardening, and loss of wet-weather confidence are stronger replacement signals on these cars than tread depth alone.

Tires on a 2020 Infiniti should be inspected before every drive and again before any longer trip. Look for sidewall cracking, punctures, bulges, uneven wear, and any sign that a tire has been run underinflated. Because these fitments use lower-profile radial sizes, it is also smart to check for impact damage from potholes or curbs that may have pinched the sidewall or bent the wheel without causing an immediate flat.

A quick walkaround catches many problems before they become roadside problems. Pay extra attention if the car has a staggered setup, because front and rear tires are different sizes and may wear differently depending on alignment and rotation limitations. Regular inspections help you catch air loss early, protect the wheels, and keep a performance-oriented Infiniti feeling stable and predictable on the road.

Yes, the 2020 Infiniti tires in these sizes are modern radial designs intended for contemporary road use, and the speed ratings shown here are well above normal U.S. highway speeds. W-rated options are rated to 168 mph and Y-rated options to 186+ mph. Several Q50 and Q60 sizes offer both W and Y choices, while 275/30R20 appears here in W form. In everyday driving, the car's alignment, suspension condition, braking system, and tire age are usually more important than the top-end speed rating itself.

The real safety question is whether the tire is the correct size, properly inflated, and in sound condition for the way the car is used. A fresh, correctly fitted W-rated tire is a better highway companion than an aged Y-rated tire with cracking or impact damage. Match the size to the wheel, keep pressures correct, and treat the tire's condition as the first priority before any headline performance number.

Inflation pressure for a 2020 Infiniti should begin with the factory placard or owner's manual for the exact model and wheel package, because that is the vehicle-specific baseline. Tire capacities shown here include 1,653 pounds at 50 psi for 245/40R19 and 265/35R19, 1,709 pounds at 50 psi for 225/50R18, 1,819 pounds at 50 psi for 225/55R17, 1,764 pounds at 50 psi for 255/40R19, and 1,609 pounds at 50 psi for 255/35R20. Those figures are tire ratings, not a blanket inflation recommendation for every driving situation.

Use the Infiniti placard for day-to-day pressure targets unless you have a deliberate reason to adjust within the tire maker's guidance. Do not copy a pressure number from one size to another just because both are used on 2020 Infiniti vehicles. Different load indexes, wheel diameters, and front-to-rear duties can change the correct pressure, especially on staggered Q50 or Q60 setups.

Before a longer drive in a 2020 Infiniti, inspect all four tires for cuts, bulges, irregular wear, and weather checking, then confirm cold pressures against the vehicle placard. Check the spare as well if the car is equipped with one, and look over the valve stems for cracking or looseness. On low-profile Q50 and Q60 fitments, also examine each wheel lip for bends or impact damage that might not be obvious when the car is parked.

Tires are only one part of a longer-trip check, but they are the part touching the road. A few minutes spent verifying condition and pressure can prevent vibration, poor turn-in, or a pressure-loss surprise miles from home. If the car has been parked for a while, include a short shakedown drive before the trip so you can feel for flat spotting, pull, or other issues while still close to home.