2019 Acura Tire Fitment Guide

2019 Acura vehicles use seven sizes across four model lines: 215/45R17 and 225/40R18 for the ILX; 245/35R19 and 305/30R20 for the NSX; 245/40R19 for the RLX; and 225/55R17, 225/50R18, or 245/40R19 for the TLX. Rim diameters span 17, 18, 19, and 20 inches, and 245/40R19 is the only size shared by more than one model, covering the RLX and some TLX applications.

That spread means 2019 Acura fitment starts with identifying the exact model and then confirming the wheel diameter already on the car. A sedan owner comparing RLX and TLX fitments may find overlap at 19 inches, while an NSX owner must keep the front and rear sizes in their proper staggered positions.

On a 2019 Acura, 215/45R17 is a metric radial size. The 215 is the tire’s nominal section width in millimeters, 45 is the aspect ratio, the R means radial construction, and 17 is the wheel diameter in inches. For 2019 Acura applications, this size belongs to the ILX and fits 17-inch rims, with product rim-width guidance centered around 7.0 to 8.0 inches.

Understanding that code helps you avoid mixing up the ILX’s 17-inch setup with its optional 18-inch fitment. It also tells you this is a relatively low-profile tire compared with the TLX’s taller 225/55R17, so matching the exact size on the wheel matters more than assuming any 17-inch Acura tire will interchange.

No, 2019 Acura models do not use the same tire size. The ILX uses either 215/45R17 or 225/40R18, the NSX uses a staggered 245/35R19 front and 305/30R20 rear setup, the RLX uses 245/40R19, and the TLX spans 225/55R17, 225/50R18, and 245/40R19. Only the 245/40R19 crosses model lines, and even that applies only to the RLX and certain TLX applications.

For a buyer, that means year and make alone are not enough for a confident tire choice. If you are working with a 2019 Acura sedan, start by confirming whether you have an ILX, RLX, or TLX, then verify the wheel diameter already installed before narrowing the tire options.

Most 2019 Acura tire sizes come in Blackwall form, which is the standard appearance across the ILX, RLX, TLX, and NSX fitments. Two sizes broaden that look: 225/55R17 for the TLX is also available as a Wide Whitewall, and 305/30R20 for the NSX is available in Blackwall, RWL, and Redline styles. Those specialty sidewalls sit outside the typical original visual character of a late-model Acura sedan or supercar.

Appearance matters most when the car has a deliberate custom theme. A TLX owner pursuing a distinctive styling direction may gravitate toward the whitewall option, while an NSX owner can choose between a modern blackwall or a more custom-oriented RWL or redline presentation. Buyers who want the most factory-like look will generally stay with Blackwall products.

2019 Acura tire sizes are covered by BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich appears across every size except that 305/30R20 adds Pro-Trac and Nitto choices for the NSX rear fitment, while Nitto also appears in 225/40R18 and 245/35R19. Some sizes are single-brand fitments in practice, such as 215/45R17, 245/40R19, 225/55R17, and 225/50R18, all of which center on BFGoodrich offerings.

Brand choice often narrows once you know the exact size. ILX and TLX owners in the more common sedan sizes may be comparing BFGoodrich lines within one brand family, while NSX owners and some ILX owners in 18-inch fitments have a broader brand mix to consider across different product personalities and sidewall appearances.

For 2019 Acura sizes where both appear, BFGoodrich g-Force Sport COMP-2 and BFGoodrich g-Force Phenom T/A share the same basic radial performance category and Blackwall appearance, but their published details are not identical. In 245/40R19, for example, the Sport COMP-2 carries a 98W marking with a 1,653-pound load figure at 50 psi, while the Phenom T/A carries a 98Y marking with the same 1,653-pound load figure at 50 psi. In 225/55R17, the Phenom T/A also carries a higher published load figure than the Sport COMP-2.

That means the choice comes down to the exact size and spec combination you want rather than a simple appearance difference. When comparing two products in the same 2019 Acura size, look closely at the speed symbol, load figure, and any wheel-width guidance attached to that tire before deciding which one best matches your driving needs.

Rim-width guidance varies by size on 2019 Acura applications. 215/45R17 fits roughly 7.0 to 8.0 inches, 225/40R18 fits about 7.5 to 9.0 inches, 245/35R19 fits about 8.0 to 9.5 inches where published, 245/40R19 fits about 8.0 to 9.5 inches, 225/55R17 fits about 6.0 to 9.0 inches depending on product, and 225/50R18 fits about 6.0 to 8.0 inches. Each size should stay on the wheel-width range intended for that exact tire.

That range matters because two tires with the same rim diameter can still want different wheel widths. Before choosing a replacement for any 2019 Acura, compare the actual wheel width on the car to the range for the specific tire you are considering, especially when moving between the ILX, TLX, and RLX 17-, 18-, and 19-inch fitments.

No, the original wheels on a 2019 Acura cannot be treated as universal across the full model range because the tire sizes span 17-, 18-, 19-, and 20-inch rim diameters. The ILX uses 17- or 18-inch fitments, the NSX uses 19-inch front and 20-inch rear fitments, the RLX uses 19-inch fitment, and the TLX can use 17-, 18-, or 19-inch fitments. Only the 245/40R19 size overlaps between models, covering the RLX and certain TLX versions.

In practical terms, wheel diameter must match the tire diameter exactly before anything else is considered. Even when two 2019 Acura models share a 19-inch tire size, it is still wise to confirm wheel width and the intended application rather than assuming every 19-inch Acura wheel is interchangeable in the same way.

A 2019 Acura should be stored on clean, properly inflated tires in a cool, dry space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment. Radial tires tolerate storage better than old bias-ply designs, but they still age from heat, UV exposure, and long periods of sitting in one position. If the car will be parked for an extended time, periodic movement helps avoid temporary flat spotting.

That advice matters for every model in the range, from an ILX driven occasionally to an NSX that may spend long intervals in climate-controlled storage. A simple routine of checking inflation, rolling the car periodically, and keeping the tires off oily or damp surfaces will do more for tire preservation than mileage alone ever will.

Tires on a 2019 Acura should be judged by age as much as by tread depth, especially on low-mileage collector or hobby-driven cars. A good rule is to inspect them closely once they are about five to seven years old and to treat the ten-year mark as a serious replacement consideration regardless of miles. The DOT date code on the sidewall is the best way to confirm the tire’s age.

That approach is especially useful on vehicles that are driven lightly, because a tire can look acceptable at a glance while the rubber has hardened with time. Owners of 2019 Acura vehicles that spend long periods parked should pay attention to age, cracking, and how the tire feels on the road, not just the remaining tread.

Tires on a 2019 Acura should be inspected before every drive and again before any longer trip. Look for sidewall cracking, cuts, bulges, punctures, uneven tread wear, and pressure loss, and make sure the tread has not worn more heavily on one edge than the other. Because these are modern radial fitments, consistent pressure and even wear are especially important to preserving their intended handling behavior.

A brief walk-around catches problems early, especially on cars that sit between drives. If an NSX, RLX, TLX, or ILX has been parked for several weeks, check cold inflation pressures before moving it any distance, and have any vibration, pull, or visible damage inspected before returning the car to regular road use.

Yes, the tire sizes used on 2019 Acura vehicles are suitable for highway driving when they are in good condition, properly inflated, and matched to the correct wheel and application. The speed symbols present here are primarily W and, in one 245/40R19 application, Y. W carries a 112 mph ceiling, while Y carries a 186 mph ceiling or higher, which places these tires comfortably above normal U.S. highway speeds.

Real-world safety depends just as much on condition, age, alignment, and the vehicle’s overall mechanical health as on the speed symbol itself. On a 2019 Acura, especially a high-performance model like the NSX, the smartest approach is to match the exact front or rear size, maintain proper inflation, and avoid treating the speed rating as a target rather than a ceiling.

Published maximum pressure figures vary by size and sometimes by product on 2019 Acura tires. Examples include 51 psi on some 215/45R17, 225/40R18, and 225/55R17 applications, and 50 psi on certain 245/35R19, 245/40R19, and 225/50R18 applications. Those figures are tied to the tire’s rated load capacity, not automatically to the vehicle manufacturer’s recommended cold inflation pressure.

For day-to-day use, follow the 2019 Acura door-jamb placard or owner’s manual for the vehicle’s recommended pressure, then compare that with the tire manufacturer’s sidewall information for the exact product you choose. Do not carry a pressure number from one size to another, and do not assume a maximum pressure figure is the correct running pressure.

Before a longer drive in a 2019 Acura, inspect each tire for cracking, cuts, punctures, bulges, and uneven wear, then confirm cold pressure with an accurate gauge. Check that the tread is sound across the full width, verify that the valve stems are in good condition, and inspect the spare if the car carries one. On staggered applications such as the NSX, confirm that the front and rear sizes have not been mixed.

Tires are only one part of the pre-drive routine on a modern performance-oriented car. It is also wise to check fluids, brakes, battery condition, and alignment-related symptoms before a trip, because a tire that is technically sound can still wear poorly or feel unstable if another mechanical issue is working against it.