The 2020 Infiniti Q50 sits in the modern sport-luxury sedan segment, blending sharp styling with a chassis that ranges from comfortable daily-driver duty to more aggressive performance-oriented trim levels. Tire choice matters on this car because fitment changes across the lineup, from 17-inch and 18-inch square setups to 19-inch configurations, including a staggered arrangement on the Red Sport 400 RWD. Every primary fitment for the 2020 Infiniti Q50 is radial, so the key decision is matching the exact sub-model and wheel diameter first, then comparing available tire series, blackwall versus restoration-inspired sidewall treatments, and road-use priorities before making a final selection.
Which Tire Size Is Right for The 2020 Infiniti Q50
The 2020 Infiniti Q50 uses four primary tire sizes, and the right one depends on the exact sub-model and wheel setup. Fitment also spans three rim diameters, with 17-inch, 18-inch, and 19-inch applications, so confirming the wheel diameter is the first step. That matters most on the Q50 because some trims use a square setup while the Red Sport 400 RWD uses separate front and rear sizes.
Fit(s): Edition 30 (AWD), Edition 30 (FWD), Red Sport 400 (AWD), Red Sport 400 (RWD) Front, Sport (AWD), and Sport (RWD)
Construction: Radial|Rim: 19 in
245/40R19 is a modern metric radial size: 245 is the section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 19 is the wheel diameter in inches. On the 2020 Infiniti Q50, this size serves several 19-inch applications, including Edition 30, Sport, and part of the Red Sport 400 lineup. Available choices center on BFGoodrich blackwall performance-oriented series such as g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. This size is the right place to compare series character and wheel-width compatibility after confirming that the car actually has the 19-inch setup.
225/50R18 is a modern metric radial size with a 225-millimeter nominal section width, a 50-series profile, radial construction, and an 18-inch rim diameter. For the 2020 Infiniti Q50, this size applies to the Luxe trim and represents a distinct 18-inch fitment rather than an interchangeable alternative to the 17-inch or 19-inch options. BFGoodrich offerings in this size include blackwall g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series. It is the size to evaluate when the goal is to stay with the Luxe wheel package while comparing all-season versus more performance-focused product families.
225/55R17 is a modern metric radial size in which 225 denotes section width in millimeters, 55 identifies the profile, R marks radial construction, and 17 is the wheel diameter. On the 2020 Infiniti Q50, this size belongs to the Pure trim and opens up the broadest visible style range, not just performance blackwalls. Alongside BFGoodrich g-Force series options, this size is also available in Silvertown Radial versions with Wide Whitewall and Redline sidewall treatments. That makes it especially useful for owners who want the correct 17-inch fitment first but also want more freedom in appearance.
265/35R19 is a modern metric radial size with a wider 265-millimeter section width, a lower 35-series profile, radial construction, and a 19-inch rim diameter. For the 2020 Infiniti Q50, this is the rear tire size on the Red Sport 400 RWD, so it plays a specific role in a staggered setup rather than serving as a universal 19-inch Q50 size. Available blackwall choices include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and the Nitto NT555 G2. This size should be chosen only after confirming the car is the rear position of the staggered Red Sport 400 RWD configuration.
Tire fitment on the 2020 Infiniti Q50 varies by sub-model, and in one case it also varies by axle position. Checking the exact trim and wheel setup matters because the Q50 spans 17-inch, 18-inch, and 19-inch applications, with the Red Sport 400 RWD using a staggered front-and-rear arrangement.
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2020 Infiniti Q50 Edition 30 (AWD)
The 2020 Infiniti Q50 Edition 30 (AWD) uses a 19-inch radial fitment with the 245/40R19 size. Tire selection here is mainly about staying with the correct 19-inch setup while comparing available blackwall performance-oriented tire series.
The 2020 Infiniti Q50 Edition 30 (FWD) also uses the 245/40R19 radial size on a 19-inch wheel. That keeps the fitment straightforward, so the next decision becomes choosing among the available series within that size rather than sorting through multiple primary sizes.
The 2020 Infiniti Q50 Luxe uses the 225/50R18 radial size, giving it its own 18-inch fitment separate from the Pure and 19-inch trims. The important step is confirming the 18-inch wheel package, then comparing the available blackwall tire series that match that setup.
The 2020 Infiniti Q50 Pure uses the 225/55R17 radial size on a 17-inch wheel. This sub-model offers both blackwall performance-style choices and more appearance-driven Wide Whitewall or Redline Silvertown Radial options, so buyers can weigh look as well as fitment.
The 2020 Infiniti Q50 Red Sport 400 (AWD) uses the 245/40R19 radial size rather than the staggered front-and-rear arrangement seen on the RWD version. Selection is centered on matching the correct 19-inch size and comparing the available performance-oriented blackwall tires.
The front fitment for the 2020 Infiniti Q50 Red Sport 400 (RWD) is 245/40R19. That means front tire selection should be handled as part of a staggered package, with special attention to preserving the intended front-to-rear size relationship.
The rear fitment for the 2020 Infiniti Q50 Red Sport 400 (RWD) is 265/35R19, a wider 19-inch radial size used only at the rear position. Tire choice here depends on keeping the rear size distinct from the front and confirming compatibility with the car's staggered setup.
The 2020 Infiniti Q50 Sport (AWD) uses the 245/40R19 radial size. With fitment fixed to the 19-inch wheel package, the practical decision becomes choosing among the available blackwall performance-style tire series in that size.
The 2020 Infiniti Q50 Sport (RWD) uses the same 245/40R19 radial size as several other 19-inch Q50 trims. That makes the fitment itself simple, while product selection comes down to the specific series characteristics available within that size.
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 2020 Infiniti Q50 Tires for Sale
Available 2020 Infiniti Q50 tire choices are centered on radial blackwall performance series from BFGoodrich, with Nitto also appearing in 265/35R19. The 225/55R17 fitment adds extra appearance variety through Silvertown Radial options in Wide Whitewall and Redline sidewall styles.
The most important 2020 Infiniti Q50 tire questions revolve around identifying the correct size by trim, confirming 17-inch, 18-inch, or 19-inch wheel fitment, understanding the staggered Red Sport 400 RWD setup, and comparing available series and sidewall choices.
Tire Size & Fitment
What tire size fits a 2020 Infiniti Q50?
The 2020 Infiniti Q50 uses four primary tire sizes: 225/55R17, 225/50R18, 245/40R19, and 265/35R19. The exact size depends on the trim level and wheel package, with the Pure using 225/55R17, the Luxe using 225/50R18, several 19-inch trims using 245/40R19, and the Red Sport 400 RWD adding a 265/35R19 rear tire.
That means the first step is identifying the exact sub-model and confirming the wheel diameter already on the car. On the Red Sport 400 RWD, front and rear sizes are different, so the tire position matters as much as the trim name when selecting replacements.
What size rim does a 2020 Infiniti Q50 use?
A 2020 Infiniti Q50 can use 17-inch, 18-inch, or 19-inch rims depending on the sub-model. The 225/55R17 size mounts on a 17-inch wheel, the 225/50R18 size uses an 18-inch wheel, and both 245/40R19 and 265/35R19 are 19-inch applications.
Wheel diameter should be confirmed before comparing tire choices because the Q50 does not use one universal rim size across the lineup. Owners should also verify the actual wheel setup on the car, especially if aftermarket wheels or trim swaps may have changed it from its original configuration.
Why does the 2020 Infiniti Q50 have more than one tire size?
The 2020 Infiniti Q50 has more than one tire size because different sub-models were equipped with different wheel packages, and the Red Sport 400 RWD uses a staggered arrangement. That creates separate 17-inch, 18-inch, and 19-inch fitments within the same model year, plus a dedicated rear 265/35R19 size on the staggered car.
For a buyer, that means tire selection starts with configuration, not just the year and model name. Matching the exact trim and, when necessary, the front or rear position helps avoid mixing sizes that belong to different Q50 setups.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 Infiniti Q50?
Start with the correct primary size for the exact 2020 Infiniti Q50 trim, then match the wheel diameter and tire construction. Every primary fitment here is radial, so the next comparison points are tire series, sidewall style where available, rim-width compatibility, and product characteristics that suit the way the car is driven.
The decision changes slightly by trim. A Pure owner may compare both appearance-oriented 17-inch options and blackwall performance-style radials, while a Red Sport 400 RWD owner needs to preserve the staggered front-and-rear relationship before looking deeper at individual product details.
What sidewall styles are available for 2020 Infiniti Q50 tires?
Most 2020 Infiniti Q50 tire options are blackwall radials, especially in the 18-inch and 19-inch sizes. The 225/55R17 fitment used on the Pure adds more variety, with BFGoodrich Silvertown Radial offerings available in Wide Whitewall and Redline sidewall styles alongside blackwall g-Force-series choices.
That makes sidewall style an actual selection factor only for the 17-inch setup. Owners interested in a more traditional or custom look should still confirm the tire size and wheel diameter first, since appearance choices do not override the Q50's trim-specific fitment requirements.
What brands offer tires for the 2020 Infiniti Q50?
BFGoodrich appears across all four primary 2020 Infiniti Q50 tire sizes, with product lines including g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and Silvertown Radial in the 17-inch size. Nitto also appears in the 265/35R19 rear fitment used on the Red Sport 400 RWD.
Brand comparison should come after the fitment basics are settled. Once the correct size and wheel setup are confirmed, the useful differences to compare are the series offered in that size, the sidewall presentation, and any wheel-width or load-capacity details that matter for the specific Q50 configuration.
Restoration & Appearance
Which tire should I choose for a period-style 2020 Infiniti Q50?
A period-style approach on a 2020 Infiniti Q50 still starts with the correct trim-specific size, since the car uses modern radial fitments rather than vintage sizing. The Pure's 225/55R17 setup offers the widest appearance range, including Silvertown Radial choices that add Wide Whitewall or Redline styling beyond the usual blackwall performance look.
That makes the 17-inch Pure fitment the clearest path for owners who want to add visual character while staying within the correct primary size. Appearance should follow fitment, so wheel diameter, trim, and overall tire proportions still need to be checked before choosing a more style-driven option.
How does tire construction affect the appearance of a restored 2020 Infiniti Q50?
Tire construction is less of an appearance divide on a 2020 Infiniti Q50 because every primary fitment is radial. The bigger visual difference comes from sidewall treatment and tire series, especially on the 225/55R17 size where blackwall, Wide Whitewall, and Redline options create very different presentations.
Owners building a clean, showroom-inspired sedan will usually focus on modern blackwall radials in the correct size, while a custom-styled Q50 may lean toward the more distinctive 17-inch sidewall treatments. The key is keeping the trim-specific size intact so the look does not come at the expense of proper fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Infiniti Q50?
Yes, modifications can affect tire fitment on a 2020 Infiniti Q50 even when the tire size itself matches one of the correct primary applications. Aftermarket wheels, altered wheel width, suspension lowering, alignment changes, or body modifications can all change how much clearance the tire has at the fender, strut, or steering components.
That matters most on the 19-inch setups and on the staggered Red Sport 400 RWD arrangement, where front and rear sizes play different roles. Any modified Q50 should have wheel diameter, width, and clearances checked before replacement tires are chosen just by the factory size markings.
What should I inspect before driving a 2020 Infiniti Q50 on new tires?
Before driving a 2020 Infiniti Q50 on new tires, inspect the wheels for damage, confirm the correct size is mounted in the correct position, and make sure inflation pressure is set properly. It is also smart to check for suspension wear, uneven old-tire wear patterns, and any signs that alignment or wheel balance may need attention.
A quick clearance check is especially worthwhile on cars with 19-inch wheels or a staggered setup, and even more so if the car has aftermarket wheels. Those steps help the new tires wear evenly and reduce the chance that a fitment or chassis issue will be mistaken for a tire problem.
How often should tires on a 2020 Infiniti Q50 be inspected?
Tires on a 2020 Infiniti Q50 should be inspected regularly for tread wear, cuts, punctures, sidewall damage, and pressure loss. Even a newer performance-oriented sedan can develop tire issues from pothole impacts, alignment changes, or long periods of underinflation, so routine visual checks are just as important as mileage-based service intervals.
Owners should pay extra attention to the Red Sport 400 RWD because staggered setups can hide uneven wear if front and rear positions are assumed to be the same. Checking condition before longer drives and after any suspension or wheel change helps catch problems early and protects the intended fitment.
