The 1991 Infiniti Q45 arrived as Infiniti’s flagship luxury sedan, blending Japanese engineering with the smooth, high-speed character expected of an early 1990s premium performance four-door. For owners today, tire choice matters because the car’s stance, ride quality, and road manners depend on staying with the correct 215/65R15 radial fitment on a 15-inch wheel. That opens the door to more than one approach, from raised white letter performance styling to redline and wide whitewall treatments that change the car’s visual character. The key is choosing a tire that suits the way the Q45 is being preserved, driven, and presented while confirming wheel compatibility first.
Which Tire Size Is Right for The 1991 Infiniti Q45
The 1991 Infiniti Q45 uses one primary tire size: 215/65R15, and it is a radial fitment for a 15-inch rim. Both the Q45 A and Q45 Base use this same size, so the decision is less about identifying between multiple factory sizes and more about choosing the right tire style, brand, and appearance within that fitment.
In 215/65R15, the 215 identifies the tire’s nominal section width in millimeters, 65 is the aspect ratio, R indicates radial construction, and 15 is the wheel diameter in inches. For the 1991 Infiniti Q45, this modern metric radial format suits the car’s original era and keeps the fitment centered on a 15-inch wheel. Available choices include Goodyear, Cooper, and BFGoodrich options, with sidewall treatments such as OWL, raised white letter, redline, and wide whitewall across series like Eagle GT, Cobra Radial G/T, Silvertown Radial, and Radial T/A. That makes this size a matter of matching the tire’s look and character to the Q45’s intended presentation and use.
Tire fitment is straightforward across the covered 1991 Infiniti Q45 sub-models. The main reason to check the exact sub-model is simply to confirm that the car still carries its original 15-inch wheel setup before choosing among the available radial tire styles.
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1991 Infiniti Q45 A
The 1991 Infiniti Q45 A uses the same 215/65R15 radial fitment as the rest of the covered Q45 range. That keeps tire selection focused on sidewall style, brand, and wheel-width compatibility rather than sorting through multiple primary sizes.
The 1991 Infiniti Q45 Base also uses 215/65R15 radial tires on a 15-inch wheel. For this sub-model, the real choice is whether the car looks best with a more performance-oriented raised white letter tire or a more traditional sidewall treatment.
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 1991 Infiniti Q45 Tires for Sale
Available 215/65R15 choices for the 1991 Infiniti Q45 include Goodyear, Cooper, and BFGoodrich radial tires across Eagle GT, Cobra Radial G/T, Silvertown Radial, and Radial T/A lines. The product grid gives buyers useful contrast in sidewall style, including OWL, raised white letter, redline, and wide whitewall treatments.
These FAQs focus on the exact 215/65R15 fitment used on the 1991 Infiniti Q45, along with wheel sizing, sidewall and brand choices, and the checks that matter before putting a collector-era luxury sedan back on the road.
Tire Size & Fitment
What tire size fits a 1991 Infiniti Q45?
The 1991 Infiniti Q45 uses a 215/65R15 radial tire. That size applies across the covered Q45 A and Q45 Base sub-models, so the primary fitment question is straightforward for an unmodified car still using its original wheel diameter.
The next step is making sure the car still has 15-inch wheels and a compatible wheel width before choosing among the available tires in that size. Once the wheel setup is confirmed, selection usually comes down to sidewall appearance, brand preference, and how the car is being maintained or presented.
What size rim does a 1991 Infiniti Q45 use?
The 1991 Infiniti Q45 uses a 15-inch rim with its 215/65R15 tire size. Product options in this fitment are built for 15-inch wheels, with rim-width compatibility varying by tire, including examples around 5.50 to 7.50 inches and 6.0 to 7.5 inches.
Rim diameter needs to match the tire exactly, so a 15-inch tire should only be used on a 15-inch wheel. Wheel width matters too, especially on a car that may have seen aftermarket changes over time, so checking both dimensions helps narrow the product choices safely.
Do all 1991 Infiniti Q45 sub-models use the same tire size?
Yes. The covered 1991 Infiniti Q45 sub-models use the same 215/65R15 radial size. Both the Q45 A and Q45 Base share that fitment, which keeps tire shopping simpler than on vehicles where different trims use different wheel and tire combinations.
Even with shared fitment, it still helps to confirm the car’s actual wheel setup before choosing a replacement set. A long-owned luxury sedan may have aftermarket wheels or prior replacement tires, and that can change what works best for clearance, appearance, and rim-width compatibility.
Choosing the Right Tire
What should I consider when choosing a 215/65R15 tire for a 1991 Infiniti Q45?
Start with the correct size, 215/65R15, and make sure the tire is intended for a 15-inch wheel with a compatible rim width. From there, the main differences are brand, series, sidewall treatment, weight, and load specification such as 1510 lbs. at 35 psi on several available options.
The best choice depends on how the Q45 is used and how it should look. A driver-focused car may suit a more performance-themed raised white letter tire, while a display-oriented sedan may lean toward redline or wide whitewall styling without changing the primary size.
What sidewall styles are available for 1991 Infiniti Q45 tires?
The 1991 Infiniti Q45 has several sidewall treatments available in 215/65R15, including OWL, raised white letter, redline, and wide whitewall. Those choices create very different visual effects even though the underlying tire size remains the same.
Sidewall style should be chosen with the car’s presentation in mind. Raised white letter and OWL options often give the Q45 a more period performance look, while redline or wide whitewall choices move the appearance in a more customized or restoration-oriented direction.
What brands offer tires for the 1991 Infiniti Q45?
Goodyear, Cooper, and BFGoodrich all offer 215/65R15 radial tires for the 1991 Infiniti Q45. Available series include Goodyear Eagle GT, Cooper Cobra Radial G/T, BFGoodrich Silvertown Radial, and BFGoodrich Radial T/A.
Choosing between them is less about chasing a single answer and more about comparing the kind of tire each brand offers in this fitment. Looking at sidewall style, rim-width range, and the overall character of each series usually tells an owner more than the brand name alone.
Restoration & Appearance
Which tire should I choose for a period-style 1991 Infiniti Q45?
A period-style 1991 Infiniti Q45 starts with the correct 215/65R15 radial size on a 15-inch wheel. From there, the visual direction can vary, with options such as Goodyear Eagle GT, Cooper Cobra Radial G/T, BFGoodrich Radial T/A, and BFGoodrich Silvertown Radial giving the car different era-appropriate personalities.
The right choice depends on whether the car is being kept close to an early 1990s luxury-performance look or styled more creatively for display. Owners pursuing exact originality should compare the tire’s appearance against marque references and surviving examples rather than assuming any current sidewall treatment is exact.
Which sidewall style suits a period-style 1991 Infiniti Q45?
The 1991 Infiniti Q45 can take on a noticeably different look depending on sidewall treatment. OWL and raised white letter options generally feel more in line with period performance styling, while redline and wide whitewall versions create a more customized or specialty presentation in the same 215/65R15 size.
That choice is mostly visual, but it still should be made within the correct size and wheel requirements. A buyer restoring the car for a restrained original-era appearance may prefer subtler sidewall treatments, while a personalized build may welcome a stronger visual statement.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1991 Infiniti Q45?
Yes. The 1991 Infiniti Q45 uses 215/65R15 tires on a 15-inch rim, but modifications can change what actually fits the car. Aftermarket wheels, altered wheel width, suspension changes, or body modifications can all affect clearance and the range of tire options that make sense.
A car that still matches its original wheel setup is usually the simplest to fit correctly. On a modified Q45, wheel diameter, width, and clearance around the fenders and steering components should be checked before assuming any 215/65R15 tire will suit the current configuration.
What should I inspect before driving a 1991 Infiniti Q45 on new tires?
Before putting a 1991 Infiniti Q45 back on the road with new tires, inspect the wheels for correct diameter and condition, confirm proper air pressure, and look over the suspension and steering for worn components. The tires themselves should be checked for uniform mounting, adequate clearance, and any sign of air loss after installation.
A luxury sedan that has spent long periods parked deserves extra attention before regular road use. It helps to recheck lug torque, confirm that the tires do not contact the body or suspension at full steering lock, and watch for vibration or pulling during the first few drives.
How should 215/65R15 tires on a collector 1991 Infiniti Q45 be maintained?
Collector-use 215/65R15 tires on a 1991 Infiniti Q45 should be kept properly inflated, inspected regularly for cracking, bulges, cuts, and uneven wear, and protected from long exposure to heat, sunlight, moisture, and ozone sources. Cars that sit for extended periods need attention even when tread wear remains low.
Routine checks matter because age and storage conditions can affect a low-mileage sedan as much as road use does. Moving the car occasionally, checking for slow air loss, and inspecting the tread and sidewalls before longer drives helps preserve both tire condition and road manners.
