The 2018 Chrysler 300 carried one of the last traditional full-size American sedan formulas into the modern era, pairing substantial proportions and rear-drive-based architecture with a more contemporary touring character. That gives tire choice real importance, because stance, wheel size, and road manners all play a visible role in how the car presents itself and drives. Depending on sub-model and drivetrain, the 2018 Chrysler 300 uses radial sizes from 215/65R17 up to 245/45R20. The main decision is identifying the exact trim and wheel setup, then choosing among available radial options, sidewall treatments, and performance-oriented series that suit the car's appearance and intended use.
Which Tire Size Is Right for The 2018 Chrysler 300
The 2018 Chrysler 300 uses four primary tire sizes, and the correct one depends on the exact sub-model, drivetrain, and wheel diameter. These are all radial fitments, but they span 17-inch, 18-inch, 19-inch, and 20-inch rims, so the first step is confirming both the specific trim and the actual wheels on the car before selecting a tire.
Fit(s): C (RWD), Limited (RWD), S (RWD), Touring (RWD), and Touring L (RWD)
Construction: Radial|Rim: 20 in
245/45R20 is a metric radial size in which 245 is the nominal section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 20 is the wheel diameter in inches. On the 2018 Chrysler 300, this size suits trims equipped with 20-inch wheels and gives the car a lower-profile, larger-wheel presentation. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with Blackwall, Redline, and RWL sidewall treatments across several tire series. This size is the one to evaluate when the car already wears 20-inch wheels and appearance or performance character matters as much as basic fitment.
Fit(s): Limited (AWD), S (AWD), Touring (AWD), and Touring L (AWD)
Construction: Radial|Rim: 19 in
235/55R19 is a metric radial size that uses a 235-millimeter nominal section width, a 55-series profile, and a 19-inch rim diameter. On the 2018 Chrysler 300, this size appears on specific AWD sub-models, making it a fitment that depends on confirming the exact drivetrain and wheel package first. Its profile sits between the shorter 20-inch fitment and the taller 17-inch package, so it represents a distinct wheel-and-tire combination rather than a cosmetic variation alone. This is the correct size to pursue when the car is equipped with original-type 19-inch wheels and AWD-specific fitment is part of the decision.
215/65R17 is a metric radial size with a 215-millimeter nominal section width, a 65-series aspect ratio, and a 17-inch wheel diameter. On the 2018 Chrysler 300, this size is tied to a particular Touring RWD configuration, so it should not be treated as a universal Chrysler 300 fitment. Compared with the larger-wheel packages on other trims, it reflects a different factory wheel setup and therefore changes the first fitment question to wheel confirmation. This size is the one to match when the car retains its 17-inch wheels and the goal is to stay aligned with that original wheel diameter and tire profile.
225/60R18 is a metric radial size in which 225 gives the nominal section width in millimeters, 60 indicates the aspect ratio, and 18 identifies the rim diameter in inches. On the 2018 Chrysler 300, it applies to a Touring L RWD configuration that uses 18-inch wheels, so exact trim and wheel verification matter before comparing products. Its proportions place it between the 17-inch and 19-inch or 20-inch fitments, making it part of a specific wheel package rather than a broad replacement range. This size deserves attention when the car still runs its 18-inch setup and the buyer wants to keep that balance of wheel diameter and sidewall height.
Tire fitment for the 2018 Chrysler 300 varies by sub-model and drivetrain, and several trims can use different wheel diameters. Checking the exact badge and whether the car is AWD or RWD matters before choosing a tire, especially on Touring and Touring L versions that appear with more than one fitment.
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2018 Chrysler 300 C (RWD)
The 2018 Chrysler 300 C (RWD) uses the 245/45R20 radial fitment, placing it in the 20-inch wheel group. Tire selection here centers less on size choice and more on comparing available radial products, sidewall appearance, and series character within that established fitment.
The 2018 Chrysler 300 Limited (AWD) uses the 235/55R19 radial size, making wheel diameter and drivetrain confirmation important before replacement. Choosing a tire for this sub-model starts with matching the 19-inch setup rather than assuming interchangeability with the RWD Limited or other trims.
The 2018 Chrysler 300 Limited (RWD) uses the 245/45R20 radial fitment. That means tire shopping focuses on the available 20-inch product choices and sidewall treatments rather than sorting through multiple primary sizes for this specific sub-model.
The 2018 Chrysler 300 S (AWD) uses 235/55R19 radial tires on a 19-inch wheel setup. For this version, the important step is matching that AWD-related size and confirming the car has not been changed to a different wheel package over time.
The 2018 Chrysler 300 S (RWD) uses the 245/45R20 radial size. Buyers looking at this trim should concentrate on 20-inch radial options and compare series or sidewall style only after confirming the car still carries its intended wheel diameter.
The 2018 Chrysler 300 Touring (AWD) uses the 235/55R19 radial fitment. That makes it part of the 19-inch group, so replacement begins with matching the correct wheel diameter and avoiding confusion with the Touring RWD configurations.
The 2018 Chrysler 300 Touring (RWD) appears with either 215/65R17 or 245/45R20 radial tires, so this is one of the trims where wheel confirmation is essential. Tire choice depends on which wheel package is actually on the car, not simply the Touring badge alone.
The 2018 Chrysler 300 Touring L (AWD) uses the 235/55R19 radial size. The practical takeaway is to stay with the 19-inch fitment unless the car has been intentionally changed, then compare tire options that suit the vehicle's touring character and wheel setup.
The 2018 Chrysler 300 Touring L (RWD) appears with either 225/60R18 or 245/45R20 radial tires, so the wheel package must be identified before shopping. Once that is confirmed, the decision shifts to choosing the right 18-inch or 20-inch tire style for the car's current configuration.
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 2018 Chrysler 300 Tires for Sale
Available 245/45R20 products for the 2018 Chrysler 300 include BFGoodrich, Nitto, and Pro-Trac choices. The product grid is most useful for comparing tire series, Blackwall versus Redline or RWL sidewalls, and wheel-width compatibility within the same 20-inch radial size.
These FAQs focus on 2018 Chrysler 300 tire sizing by trim, wheel diameter, available 245/45R20 product choices, and the fitment checks that matter before road use or after wheel and suspension changes.
Tire Size & Fitment
What tire size fits a 2018 Chrysler 300?
The 2018 Chrysler 300 uses four primary tire sizes: 245/45R20, 235/55R19, 215/65R17, and 225/60R18. All are radial sizes, but they do not apply across every version of the car. The correct size depends on the exact sub-model, drivetrain, and wheel package.
A 300 C RWD, Limited RWD, and S RWD use 245/45R20, while several AWD trims use 235/55R19. Touring RWD and Touring L RWD can appear with more than one fitment, so checking the actual tire sidewall and wheel diameter on the car is the safest starting point before comparing replacements.
What size rim does a 2018 Chrysler 300 use?
The 2018 Chrysler 300 appears with four rim diameters depending on trim and tire package: 17-inch, 18-inch, 19-inch, and 20-inch. Those correspond to the vehicle's primary tire sizes of 215/65R17, 225/60R18, 235/55R19, and 245/45R20.
Rim diameter is the first fitment detail to confirm because each tire size is built around a specific wheel diameter. A 20-inch tire does not substitute onto a 19-inch wheel, and the same principle applies across the rest of the range. If the car has changed hands or received aftermarket wheels, verify the wheel size directly before ordering tires.
Why does the 2018 Chrysler 300 have more than one tire size?
The 2018 Chrysler 300 has more than one tire size because fitment changes with trim, drivetrain, and wheel package. RWD and AWD versions do not always share the same setup, and some Touring and Touring L configurations appear with different wheel diameters within the same model line.
That means the badge on the decklid is only part of the answer. Touring RWD and Touring L RWD deserve extra attention, since each can show up with two different primary sizes. Matching the exact tire already on the car and confirming the wheel diameter will prevent confusion between trims that otherwise look very similar.
Choosing the Right Tire
What should I consider when choosing a 245/45R20 tire for a 2018 Chrysler 300?
A 245/45R20 tire for a 2018 Chrysler 300 should first match the car's actual 20-inch wheel setup. From there, the main comparison points are tire series, sidewall appearance, brand, and wheel-width compatibility. Available choices in this size include BFGoodrich, Nitto, and Pro-Trac products.
Selection often comes down to how the car is used and how it should look. Some owners want a straightforward Blackwall presentation, while others prefer a Redline or RWL sidewall for a more customized visual effect. It also helps to compare rim-width guidance and load figures where stated so the tire suits the wheel and the car's intended road use.
What sidewall styles are available for 2018 Chrysler 300 tires?
Among the available 245/45R20 products for the 2018 Chrysler 300, sidewall styles include Blackwall, Redline, and RWL. That gives the 20-inch fitment a meaningful appearance choice, especially for owners who want something other than a plain modern sidewall.
Sidewall style changes the visual character of the car more than the basic fitment, so it should be chosen after confirming size, wheel diameter, and overall tire type. Blackwall keeps a cleaner late-model look, while Redline and raised white letter options create a more assertive custom presentation without changing the underlying 245/45R20 sizing.
What brands offer tires for the 2018 Chrysler 300?
For the 245/45R20 fitment used on several 2018 Chrysler 300 sub-models, available brands include BFGoodrich, Nitto, and Pro-Trac. Those options span several tire series, so brand is only one part of the comparison once the correct size and wheel diameter are confirmed.
A useful way to compare them is by looking at series character, sidewall style, and wheel-width compatibility instead of treating brand alone as the decision. BFGoodrich choices appear in multiple g-Force lines, Nitto is available in the NT555 G2 series, and Pro-Trac offers Street Pro III versions with more distinctive sidewall treatments.
Restoration & Appearance
How does tire construction affect the appearance of a 2018 Chrysler 300?
On the 2018 Chrysler 300, the primary fitments are all radial, so the appearance question is shaped more by wheel diameter, profile, and sidewall treatment than by switching between bias-ply and radial construction. A 245/45R20 setup gives a noticeably different visual impression than a 215/65R17 or 225/60R18 package.
That makes trim-specific sizing especially important for owners who want the car to keep its intended stance. Within the available 245/45R20 options, Blackwall, Redline, and RWL sidewalls can further shift the presentation from understated to more customized. The cleanest visual result usually starts with matching the correct size for the sub-model before adding style preferences.
Does correct tire fitment matter for a 2018 Chrysler 300 restoration or appearance-focused build?
Correct tire fitment matters on a 2018 Chrysler 300 because wheel diameter and tire profile strongly influence how the car sits and how complete the finished build looks. Since this model year uses several different factory-type sizes, the wrong combination can change the sedan's visual balance even when the tire physically mounts.
An appearance-focused build should start by deciding whether the goal is to preserve the trim's original-style wheel package or move toward a custom look. Touring and Touring L models need extra care because they can appear with more than one size. Once the correct fitment is established, sidewall style becomes a secondary design choice rather than a correction step.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Chrysler 300?
Yes, modifications can affect tire fitment on a 2018 Chrysler 300. Wheel changes, altered offsets, suspension lowering, and other aftermarket changes can all influence whether the original tire size still makes sense for the car's current setup. That matters even when the new tire matches the nominal size already on the sidewall.
A modified 300 should be checked for wheel diameter, wheel width, steering clearance, and fender clearance before replacement. Touring and Touring L trims already span multiple wheel packages, so prior owner changes can add another layer of confusion. Looking at the actual wheel and tire combination on the car is more reliable than assuming every trim still carries its original setup.
What should I inspect before driving a 2018 Chrysler 300 on new tires?
Before driving a 2018 Chrysler 300 on new tires, inspect basic installation and vehicle-condition items such as tire pressure, bead seating, visible sidewall condition, valve stems, and lug torque. It also helps to confirm that the new tires match the wheel diameter and intended position on the car.
A short, careful road check can reveal rubbing, pull, vibration, or clearance issues that may not appear while the car is parked. On a 300 with larger 20-inch wheels or any suspension changes, turn the steering through its range and watch for contact near liners or suspension components. Catching those issues early protects both the tires and the car.
How often should tires on a 2018 Chrysler 300 be inspected?
Tires on a 2018 Chrysler 300 should be inspected regularly rather than only at replacement time. A quick visual check for tread wear, cuts, cracking, bulges, and uneven wear patterns is worthwhile before longer drives and as part of routine maintenance, especially on a car that may sit for stretches between outings.
Periodic checks are also useful because this model year uses several wheel and tire combinations, and replacement history is not always obvious from the trim name alone. Looking at pressure retention and wear pattern can also hint at alignment or suspension issues. Consistent inspection is one of the simplest ways to catch fitment or condition problems before they become road-use concerns.
