The 2000 Infiniti Q45 represents the final stretch of Infiniti’s flagship rear-drive luxury sedan, blending understated executive styling with the smooth, modern character that defined premium Japanese sedans at the turn of the century. Tire fitment on this exact model depends on the sub-model, with 215/60R16 radials used on the Base and T, while the Anniversary Edition uses 225/50R17 radials. That makes wheel diameter the first thing to confirm before choosing tires. Available 17-inch options lean toward blackwall performance-oriented radial designs from BFGoodrich and Nitto, so the right selection comes down to matching the correct size, wheel setup, and intended driving use.
Which Tire Size Is Right for The 2000 Infiniti Q45
The 2000 Infiniti Q45 uses two primary tire sizes, and the correct one depends on the exact sub-model and wheel diameter. Base and T models use 215/60R16 radials, while the Anniversary Edition uses 225/50R17 radials, so confirming whether the car has 16-inch or 17-inch wheels is the first step before comparing tire choices.
225/50R17 is a metric radial size in which 225 refers to the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 17 is the wheel diameter in inches. On the 2000 Infiniti Q45, this size applies to the Anniversary Edition and reflects a lower-profile fitment than the 16-inch alternative. Available choices in this size include blackwall radial tires from BFGoodrich and Nitto across performance-oriented series such as g-Force Comp 2 AS, g-Force Sport Comp 2, and NT555 G2. This is the size to evaluate when the car is equipped with its 17-inch wheel package.
215/60R16 is a metric radial size where 215 indicates nominal section width in millimeters, 60 is the aspect ratio, R means radial construction, and 16 is the wheel diameter in inches. On the 2000 Infiniti Q45, this size belongs to the Base and T sub-models rather than the Anniversary Edition. Its dimensions point to a slightly taller-profile fitment than the 17-inch setup, so it should be matched to the actual wheel diameter on the car. This is the right size to pursue when preserving the original 16-inch wheel-based fitment for those sub-models.
Sub-model fitment matters on the 2000 Infiniti Q45 because the covered versions do not all use the same tire size. The first step is identifying whether the car is an Anniversary Edition, Base, or T model, then confirming whether it is riding on 16-inch or 17-inch wheels.
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2000 Infiniti Q45 Anniversary Edition
The 2000 Infiniti Q45 Anniversary Edition uses the 225/50R17 radial tire size. That makes the 17-inch wheel setup central to tire selection, and it also opens the door to comparing blackwall performance-oriented radial options within that exact size.
The 2000 Infiniti Q45 Base uses the 215/60R16 radial tire size. Tire selection should stay focused on the 16-inch wheel fitment unless the car has been changed from stock, in which case wheel diameter and clearance should be checked before choosing tires.
The 2000 Infiniti Q45 T also uses the 215/60R16 radial tire size. That keeps fitment straightforward for an unmodified car, with the main priority being confirmation that the existing wheels are still the proper 16-inch setup for this 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 2000 Infiniti Q45 Tires for Sale
Available 225/50R17 choices for the 2000 Infiniti Q45 include blackwall radial tires from BFGoodrich and Nitto in several performance-oriented series. The main points to compare in the product grid are tire series, load specification, weight, and rim-width compatibility.
Owners researching 2000 Infiniti Q45 tires usually need to sort out sub-model size differences first, then compare wheel diameter, available radial choices, and practical fitment checks before putting the car back on the road.
Tire Size & Fitment
What tire size fits a 2000 Infiniti Q45?
The 2000 Infiniti Q45 uses two different tire sizes depending on sub-model. The Anniversary Edition uses 225/50R17, while the Base and T models use 215/60R16. Both are radial tire sizes, but they are built for different wheel diameters, so they are not interchangeable as primary fitments without confirming the wheel setup on the car.
The practical first step is checking which sub-model the car is and then verifying whether it has 16-inch or 17-inch wheels. Many older luxury sedans have seen wheel changes over time, so the actual wheel diameter matters just as much as the badge on the trunk when selecting the correct replacement tire.
What size rim does a 2000 Infiniti Q45 use?
A 2000 Infiniti Q45 uses either a 16-inch or 17-inch rim depending on sub-model. The Base and T models are paired with the 215/60R16 size, while the Anniversary Edition uses 225/50R17. Since each tire size is tied to a specific wheel diameter, the correct rim size follows directly from the correct tire size.
Checking the wheel itself is still worthwhile, especially on a car that may have had replacement wheels installed at some point. The tire sidewall marking, wheel stamp, and actual mounted diameter should all agree before ordering replacement tires, because a mismatch can lead to unnecessary fitment problems and wasted time.
Do all 2000 Infiniti Q45 sub-models use the same tire size?
No, the 2000 Infiniti Q45 sub-models do not all use the same tire size. The Anniversary Edition uses 225/50R17, while both the Base and T use 215/60R16. Even though all three sub-models use radial construction, the wheel diameter and tire profile differ between the 17-inch and 16-inch fitments.
That difference means the exact sub-model should be identified before comparing products. It also means the owner should not assume a tire found on one Q45 trim automatically belongs on another, particularly if the car has passed through multiple owners or has been updated with aftermarket wheels.
Choosing the Right Tire
What should I consider when choosing a 225/50R17 tire for a 2000 Infiniti Q45?
Start with the basics: the 225/50R17 size belongs to the 2000 Infiniti Q45 Anniversary Edition and requires a 17-inch wheel. Available choices in this size include blackwall radial tires from BFGoodrich and Nitto, with differences in tire series, weight, load specification, and recommended rim-width compatibility.
The best comparison points are how closely the tire matches the car’s actual wheel width, how the car is driven, and whether the goal is a more touring-oriented replacement feel or a more performance-oriented presentation. Keeping the exact size correct matters first, then the product details help narrow the final choice.
What sidewall styles are available for 2000 Infiniti Q45 tires?
The available 225/50R17 products for the 2000 Infiniti Q45 use a blackwall sidewall style. That gives the 17-inch Anniversary Edition fitment a clean modern appearance that suits a later-model luxury sedan without introducing whitewall, stripe, or raised-letter styling into the equation.
Sidewall style is mainly an appearance decision once the correct size has been confirmed, but it still affects how the car presents overall. Owners trying to preserve the Q45’s understated look will usually want to keep the focus on proper sizing, wheel compatibility, and tread type rather than searching for vintage-style sidewall treatments.
What brands offer tires for the 2000 Infiniti Q45?
For the 225/50R17 fitment used on the 2000 Infiniti Q45 Anniversary Edition, available brands include BFGoodrich and Nitto. The BFGoodrich options appear in more than one g-Force series, while Nitto is represented by the NT555 G2, giving buyers a few distinct radial choices within the same basic size.
Brand alone should not be the only deciding factor. It makes more sense to compare the exact tire series, load specification, wheel-width suitability, and intended use of the car, especially when choosing for a full-size luxury sedan that may be driven very differently from one owner to the next.
Restoration & Appearance
Which tire should I choose for a period-style 2000 Infiniti Q45?
A period-style 2000 Infiniti Q45 starts with using the correct sub-model tire size rather than chasing a vintage-looking tire. That means 225/50R17 for the Anniversary Edition or 215/60R16 for the Base and T, both in radial construction, since this Q45 belongs to a modern luxury-sedan era rather than a bias-ply collector era.
Appearance on this car is usually best preserved by staying close to the intended wheel diameter and overall tire profile. If originality matters, confirm the current wheel setup before buying, because later wheel swaps can change the visual balance of the car even when the replacement tire itself is a quality radial option.
Does correct tire fitment matter for a 2000 Infiniti Q45 restoration?
Yes, correct tire fitment matters on a 2000 Infiniti Q45 restoration because the car uses different tire sizes across its sub-model range. The proper size affects not only appearance, but also the relationship between the tire, wheel diameter, and the overall stance that suits this late-model flagship sedan.
Restoration-minded owners should verify whether the car still carries the wheel diameter associated with its original sub-model before selecting tires. Even a well-restored car can look noticeably off if the tire profile is mismatched to the wheel, so fitment accuracy is part of preserving the Q45’s intended visual character.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2000 Infiniti Q45?
Yes, modifications can affect tire fitment on a 2000 Infiniti Q45. Wheel changes, suspension alterations, lowering, and body or fender modifications can all change the space available around the tire, even when the car still appears close to stock at a glance.
A Q45 with aftermarket wheels should have wheel diameter and width confirmed before replacement tires are chosen. Clearance at the fender edge, inner wheelhouse, and steering components also deserves attention, because a tire that matches the sidewall size marking still needs to work with the car’s actual current setup.
What should I inspect before driving a 2000 Infiniti Q45 on new tires?
Before driving a 2000 Infiniti Q45 on new tires, inspect the wheels for damage, confirm the tire size matches the car’s wheel diameter, and make sure the tires are mounted and inflated properly. A quick visual check for rubbing points, uneven suspension height, and obvious alignment issues is also worthwhile.
Road use is smoother when the supporting hardware is in good condition, so pay attention to worn suspension components, loose steering feel, or signs that the previous tires wore irregularly. Those issues can shorten the life of a fresh set quickly, even when the correct 16-inch or 17-inch tire size has been chosen.
How often should tires on a 2000 Infiniti Q45 be inspected?
Tires on a 2000 Infiniti Q45 should be inspected regularly, especially if the car sees limited mileage or spends long periods parked. Sidewall cracking, tread wear, punctures, bulges, and gradual air loss can all develop quietly on a low-use sedan, even when the car still looks presentable from a distance.
A sensible routine is to look over the tires before longer drives and to check air pressure and overall condition on a regular schedule. Older luxury cars often lead gentler lives, but that does not prevent age-related issues, so condition matters just as much as tread depth before putting miles on the car.
