2018 Chrysler Tire Fitment Guide

2018 Chrysler vehicles use four tire sizes: 215/65R17, 225/60R18, 235/55R19, and 245/45R20. All four sizes apply to the Chrysler 300, but they do not share the same wheel diameter. The 17-inch size fits a 17-inch wheel, the 18-inch size fits an 18-inch wheel, the 19-inch size fits a 19-inch wheel, and the 20-inch size fits a 20-inch wheel. For the available 245/45R20 products, rim width range runs from 7.5 to 9.0 inches.

That means the first step with a 2018 Chrysler 300 is not choosing between similar tire constructions or sidewall treatments, but verifying which wheel package is actually on the car. A quick check of the existing sidewall or wheel diameter will usually settle that. Once the wheel size is confirmed, you can compare the correct tire options within that size instead of trying to cross-shop among sizes that mount to different rims.

On a 2018 Chrysler tire, 245/45R20 is a metric radial size code. The 245 is the nominal section width in millimeters, 45 is the aspect ratio, the R indicates radial construction, and 20 is the wheel diameter in inches. In the available products for this size, the 245/45R20 fitment appears in performance-oriented blackwall radial tires from BFGoodrich and Nitto, with speed ratings that include W and Y depending on the product selected.

That code tells you far more than width alone, because it also fixes the tire's profile and the wheel diameter it must mount on. A 2018 Chrysler 300 wearing 20-inch wheels needs a tire in that diameter, and a 17-, 18-, or 19-inch tire will not substitute. After confirming the size, compare the specific tire's speed rating and rim-width compatibility to make sure the product suits the car's wheel and intended driving style.

No. For 2018 Chrysler, the only model in this year-and-make grouping is the Chrysler 300, and even within that single model line the tire size varies. The 300 uses 215/65R17, 225/60R18, 235/55R19, or 245/45R20 depending on the wheel package. Every one of those is a radial size, but each mounts to a different rim diameter, so they are separate fitments rather than interchangeable alternatives.

That variation matters because a buyer who knows only the year and make still has one more identification step to take. On a 2018 Chrysler 300, trim, package, or a previous wheel change can alter what is currently on the car. Checking the existing tire sidewall or measuring wheel diameter is the quickest way to narrow the search and avoid comparing tires that belong to a different 300 setup.

BFGoodrich and Nitto make tires in the currently available 245/45R20 fitment for 2018 Chrysler vehicles. BFGoodrich appears in several series, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A, while Nitto appears with the NT555 G2. All of those products are radial blackwall tires built around the 20-inch Chrysler 300 application.

Brand choice is only part of the decision on a 2018 Chrysler 300, because speed rating and intended use can differ even when the size stays the same. Once the correct wheel diameter is confirmed, it makes sense to compare the character of each series rather than assuming every 245/45R20 is aimed at the same kind of driving. That approach is especially helpful when the car serves as both a daily driver and a highway cruiser.

The currently available 245/45R20 tires for 2018 Chrysler vehicles use blackwall sidewalls. That suits the modern character of the 2018 Chrysler 300, which was designed around contemporary wheel-and-tire proportions rather than the whitewall or vintage sidewall treatments associated with earlier collector cars. Within this fitment, the visual distinction comes more from tread category and wheel diameter than from decorative sidewall styling.

For most 2018 Chrysler 300 owners, that means the appearance decision is largely straightforward once the wheel size is known. A blackwall tire keeps the car in the style expected for a late-model full-size sedan and works especially well with larger 19- and 20-inch factory-style wheel packages. If appearance is a major priority, compare the tire's overall profile on the wheel rather than expecting sidewall ornamentation to drive the look.

In 245/45R20 for a 2018 Chrysler, BFGoodrich appears in multiple performance-oriented series, while Nitto appears with the NT555 G2. BFGoodrich products in this size include examples with W and Y speed ratings, and the available BFGoodrich tires with published fitment details use a 20-inch rim with a 7.5-to-9.0-inch rim-width range. The Nitto NT555 G2 in this size is also a radial blackwall performance tire and carries a W speed rating.

That means the comparison is less about basic fitment and more about the tire's specific performance category, speed rating, and how closely its published rim-width range matches your wheel. A 2018 Chrysler 300 owner with 20-inch wheels should compare the exact series name on each tire, not just the size code. Staying at that level helps separate an all-season-leaning option from a more aggressively performance-focused one.

Rim-width guidance is available for the 2018 Chrysler 245/45R20 fitment, where the published range is 7.5 to 9.0 inches. That size also uses a 20-inch rim diameter. The other 2018 Chrysler 300 sizes in this year-and-make range are 215/65R17, 225/60R18, and 235/55R19, each matched to its own wheel diameter, so the first compatibility check is always the wheel's inch size.

Rim width matters because the right tire size can still behave poorly if it is mounted on a wheel that falls outside the tire maker's accepted range. On a 2018 Chrysler 300 with 20-inch wheels, checking both diameter and width before purchase is the smart move, especially if the car has aftermarket wheels. If the wheel width is unknown, remove one wheel or inspect the casting or stamp marks before making the final selection.

The available 245/45R20 tires for 2018 Chrysler applications are modern radial products with no tube-type marking in the size description, which aligns with tubeless passenger-car fitment. Nothing about the 2018 Chrysler 300's modern wheel-and-tire setup points toward traditional tube-type use in this size. That fits the broader late-model sedan practice of using tubeless radial tires on contemporary one-piece wheels.

For a 2018 Chrysler 300, the practical concern is less about tubes and more about wheel condition, valve stems, and proper sealing at the bead. If the car has original wheels, inspect them for corrosion or impact damage before mounting new tires. If it has aftermarket wheels, confirm that the valve hardware and wheel design are appropriate for the exact tire and pressure requirements of the chosen size.

A 2018 Chrysler 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. Modern radial tires tolerate storage better than older bias-ply designs, but they still age from heat, UV exposure, and long periods of static load. If the car will sit for an extended period, moving it occasionally helps avoid flat spotting and uneven stress at one contact patch.

Owners who keep a 2018 Chrysler 300 as a low-use sedan or seasonal cruiser should think about storage as part of tire life, not just cosmetic preservation. A clean garage floor, stable temperatures, and correct inflation can make a noticeable difference in how the tires feel when the car goes back into service. If storage will be very long-term, some owners also use stands to reduce load, while keeping the suspension properly supported.

Tires on a 2018 Chrysler should be judged by age and condition as much as by tread depth. A common collector and low-mileage rule is to begin close evaluation around five to seven years and to treat roughly ten years as the outer edge for continued service, regardless of whether the tread still looks usable. The DOT date code on the sidewall identifies when the tire was built, which is especially important on cars that see limited annual mileage.

That matters because a 2018 Chrysler 300 can accumulate miles slowly yet still carry aging rubber. A tire that looks fine at a glance may still have hardened compound, internal age deterioration, or weather checking that changes how it behaves on the road. Checking date codes, ride quality, and visible sidewall condition gives a better picture than mileage alone when deciding whether replacement should move to the top of the maintenance list.

Tires on a 2018 Chrysler should be inspected before every drive and again before any longer highway trip. Look for cracking, cuts, bulges, irregular wear, embedded debris, and signs of pressure loss, and make sure the tread is wearing evenly across the contact patch. Because the 2018 Chrysler 300 uses modern radial tire sizes with several possible wheel packages, it is also wise to confirm that all four tires match the intended size and service category for the car.

Frequent inspection helps catch slow leaks, alignment issues, or impact damage before they become a roadside problem. On a heavier full-size sedan such as the 2018 Chrysler 300, uneven wear can also hint at suspension or inflation issues that deserve attention early. Including the spare tire in the same routine is a smart step, since an overlooked spare often becomes the weak link during a long drive.

Yes, 2018 Chrysler tires can be suitable for highway driving when the correct size, condition, and service rating are matched to the car. In the available 245/45R20 fitment, speed ratings include W, which is rated to 168 mph, and Y, which is rated to 186+ mph. Those figures are far above normal highway speeds, so on a sound 2018 Chrysler 300 the more immediate safety factors are tire age, inflation, alignment, and the overall mechanical condition of the vehicle.

Highway confidence comes from using a tire that matches the wheel, carries the right load, and is free of age-related deterioration. A speed rating should never be treated as permission to drive at that ceiling, especially on public roads, but it does tell you the tire was engineered for a certain level of sustained speed capability. For most owners, the real question is whether the tire and car are properly maintained for steady, predictable road use.

Inflation pressure for a 2018 Chrysler should follow the factory vehicle placard or owner's manual first, because the correct target depends on the exact wheel-and-tire package fitted to the car. In the available 245/45R20 products, published maximum load and pressure figures include 1930 pounds at 50 psi and 1929 pounds at 50 psi on certain tires. Those are tire capacity limits, not a blanket operating pressure for every 2018 Chrysler 300 application.

Using the vehicle's recommended cold inflation pressure is the safest starting point because Chrysler calibrated ride, handling, and load carrying around that specification. The maximum pressure molded or published for the tire becomes more relevant when understanding the tire's upper capability, not when setting everyday street pressure. If the placard is missing or the car's wheel package has been changed, verify both the vehicle recommendation and the tire maker's guidance before settling on a number.

Before a longer drive in a 2018 Chrysler, inspect each tire for cracking, punctures, bulges, irregular wear, and correct cold inflation, and make sure the spare is serviceable as well. Confirm that the tire size on the car matches the wheel diameter actually installed, since the 2018 Chrysler 300 can use 17-, 18-, 19-, or 20-inch fitments. On the tire side, valve stems, tread depth, and any signs of impact damage deserve special attention.

A longer-trip check should also include the broader vehicle systems that matter on a modern full-size sedan: brakes, fluids, battery condition, and suspension behavior. Tires are only one part of roadworthiness, but they are the part that turns a small oversight into an immediate problem. Spending a few minutes on a careful walk-around and pressure check before departure usually prevents the most common avoidable issues.