The 2020 Kia Optima sits in the modern midsize sedan class with a blend of daily-driver comfort, sharp styling, and trim-level variety that makes exact tire fitment more important than it first appears. Some versions lean toward a more comfort-oriented setup, while others carry a sportier wheel and tire package. For this model year, the Optima uses three primary radial tire sizes: 205/65R16, 215/55R17, and 235/45R18. That means the key decision is matching the tire to the correct sub-model and wheel diameter first, then comparing the available tire series within that size. Owners should also confirm whether the car still has its original wheel setup before choosing replacements.
Which Tire Size Is Right for The 2020 Kia Optima
The 2020 Kia Optima uses three primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All three are radial fitments, but they are built around different 16-inch, 17-inch, and 18-inch wheel packages. Before choosing a tire, identify the specific Optima trim and confirm the wheels currently on the car, especially if it has been changed from its original setup.
Fit(s): EX, EX Premium, Hybrid EX, and Plug-In Hybrid EX
Construction: Radial|Rim: 17 in
215/55R17 is a metric radial size where 215 is the section width in millimeters, 55 is the aspect ratio, R identifies radial construction, and 17 is the rim diameter in inches. On the 2020 Kia Optima, this size is part of the mid-range wheel package used on several sub-models and balances modern sedan proportions with everyday road manners. Available choices in this size center on BFGoodrich blackwall performance-oriented radial lines, including g-Force Comp 2 AS and g-Force Phenom T/A. This size is worth evaluating carefully if your Optima uses a 17-inch wheel and you want to stay with the intended wheel diameter while comparing tread and series character.
205/65R16 is a metric radial size that uses a 205-millimeter section width, a 65-series profile, and a 16-inch rim diameter. Within the 2020 Kia Optima range, this size serves the 16-inch wheel package and represents the smaller-diameter wheel fitment used on certain trims. Its dimensions differ from the 17-inch and 18-inch packages, so it should be selected only for cars using the correct 16-inch wheels. This is the size to focus on when matching replacement tires to an Optima configured around the base wheel diameter rather than moving into a larger trim-level package.
235/45R18 is a metric radial size in which 235 gives the nominal section width in millimeters, 45 is the aspect ratio, R denotes radial construction, and 18 is the wheel diameter. On the 2020 Kia Optima, this size belongs to the larger 18-inch wheel package used on sportier sub-models. BFGoodrich blackwall options in this fitment include the g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series, giving buyers meaningful choice within the same basic size. This size should be considered only after confirming that the car is equipped with the correct 18-inch wheels and corresponding trim-level setup.
Tire fitment for the 2020 Kia Optima varies by sub-model, so the trim designation matters before anything else. Some versions share the same radial size, while others move to a different wheel diameter and tire package, making exact identification the first step in a correct replacement search.
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2020 Kia Optima EX
The 2020 Kia Optima EX uses the 215/55R17 radial size on a 17-inch wheel package. That makes the selection process more about choosing among available 17-inch tire series and confirming the car still carries its original wheel diameter.
The 2020 Kia Optima EX Premium also uses the 215/55R17 radial fitment. Buyers with this sub-model can focus on comparing available blackwall 17-inch tire options rather than sorting through multiple primary sizes.
The 2020 Kia Optima Hybrid EX appears with two fitment paths: 205/65R16 and 215/55R17, both in radial construction. Wheel diameter becomes especially important here, since selecting the right tire starts with confirming whether the car has the 16-inch or 17-inch setup.
The 2020 Kia Optima LX uses the 205/65R16 radial size. This keeps the focus on matching the 16-inch wheel package correctly and avoiding confusion with the larger 17-inch and 18-inch sizes used elsewhere in the Optima range.
The 2020 Kia Optima Plug-In Hybrid EX uses the 215/55R17 radial size. Tire selection here centers on staying with the correct 17-inch fitment and comparing the available product series within that size.
The 2020 Kia Optima S uses the 235/45R18 radial size on an 18-inch wheel package. Owners should confirm that wheel diameter first, then compare the available BFGoodrich tire series built around this larger fitment.
The 2020 Kia Optima SX uses the 235/45R18 radial size. That places tire selection in the 18-inch group, where the decision becomes choosing the right series and confirming compatibility with the current wheel setup.
The 2020 Kia Optima Special Edition uses the 235/45R18 radial fitment. This sub-model should be matched to the proper 18-inch tire size first, with final selection based on the available blackwall series in that category.
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 2020 Kia Optima Tires for Sale
Available 17-inch and 18-inch options for the 2020 Kia Optima center on BFGoodrich radial blackwall tires. Depending on size, buyers can compare g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series, along with rim-width and load-capacity details where applicable.
For a 2020 Kia Optima, the most important tire questions usually involve matching the right size to the right trim, confirming wheel diameter, and understanding how the available tire series differ once the fitment is narrowed down.
Tire Size & Fitment
What tire size fits a 2020 Kia Optima?
The 2020 Kia Optima uses three primary tire sizes: 205/65R16, 215/55R17, and 235/45R18. All are radial sizes, but they do not apply across the full model range in the same way. The correct one depends on the exact sub-model and the wheel package on the car.
Choosing the right replacement starts with the trim level and the actual wheel diameter currently installed. An LX, EX, S, or Hybrid configuration can place the car in a different size group, and a previous owner may have changed wheels. Checking the sidewall on the current tires and confirming wheel size helps prevent ordering a tire that matches the model name but not the car itself.
What size rim does a 2020 Kia Optima use?
A 2020 Kia Optima can use 16-inch, 17-inch, or 18-inch rims depending on the sub-model. The 205/65R16 tire uses a 16-inch rim, the 215/55R17 tire uses a 17-inch rim, and the 235/45R18 tire uses an 18-inch rim. Rim diameter follows the last number in each tire size.
That wheel diameter is the first fitment detail to verify before comparing tires. A tire built for a 17-inch wheel cannot be mounted on a 16-inch or 18-inch rim, even if the rest of the vehicle seems similar. If the Optima has aftermarket wheels, confirm the actual diameter and width on the car rather than assuming the trim still carries its original setup.
Why does the 2020 Kia Optima have more than one tire size?
The 2020 Kia Optima uses more than one tire size because the model range includes different sub-models and wheel packages. Some versions use 205/65R16, several use 215/55R17, and others use 235/45R18. The Hybrid EX can also appear with either a 16-inch or 17-inch tire fitment.
That variation means the model year alone is not enough to choose tires confidently. The trim badge, current wheel diameter, and the size printed on the existing tire all matter. Once those basics are confirmed, the buying decision becomes much simpler because you can compare products only within the size that matches your particular Optima configuration.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 Kia Optima?
Start with the correct primary size for the exact 2020 Kia Optima sub-model and wheel diameter. From there, compare the construction, series, load details where stated, and the rim-width specifications attached to the tire. On this application, the available products are radial blackwall tires, so size and series are the main decision points.
A useful way to narrow the field is to match the tire to how the car is used. Daily commuting, occasional spirited driving, and maintaining the current wheel package can point toward different series choices even within the same size. It also helps to confirm that all four wheels match, since a used Optima may not always retain the same wheel setup it left the dealership with.
What brands offer tires for the 2020 Kia Optima?
The available products for the 2020 Kia Optima are from BFGoodrich in the covered sizes with current product support. The 215/55R17 fitment includes g-Force Comp 2 AS and g-Force Phenom T/A choices, while the 235/45R18 fitment adds g-Force Sport Comp 2 to the mix. All of these options are radial blackwall tires.
Brand alone is only part of the decision. Once the correct size is confirmed, compare the series name, rim-width compatibility, and any stated load information to understand how one BFGoodrich option differs from another. That approach is more useful than assuming every tire within the same diameter serves the same purpose across different Optima trims.
What tire series are available for the 2020 Kia Optima?
The 2020 Kia Optima is supported here by several BFGoodrich series, including g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. Availability depends on the exact tire size, with the 18-inch 235/45R18 fitment offering the broadest series selection among the sizes that have current product coverage.
Series names matter because they help separate one tire choice from another when the base fitment is already correct. After confirming whether the car uses 17-inch or 18-inch wheels, compare the available series within that size rather than across different diameters. That keeps the decision tied to the actual Optima setup instead of mixing products meant for other wheel packages.
Restoration & Appearance
Does correct tire fitment matter for a 2020 Kia Optima restoration?
Correct tire fitment still matters on a 2020 Kia Optima, even though this is a modern vehicle rather than a traditional restoration-era car. The right size preserves the intended relationship between the wheel package and the body, and it keeps the car aligned with the trim-specific setup it was built around. For this model, that means staying with the correct 16-inch, 17-inch, or 18-inch fitment.
Appearance is part of that equation, especially on trims that use the larger 18-inch package. A tire that does not match the proper wheel diameter or profile can change the car’s stance and visual balance. Owners trying to return an Optima to stock-style presentation should confirm the exact trim and wheel package before choosing replacements or cosmetic upgrades.
How does tire construction affect the appearance of a restored 2020 Kia Optima?
On a 2020 Kia Optima, construction does not create a bias-ply-versus-radial appearance decision because the primary fitments are radial. The visual difference comes more from using the correct size and wheel diameter than from changing construction type. In the available product range, the presentation stays consistently modern with blackwall radial tires.
That makes appearance selection more straightforward than it is on many vintage vehicles. The main goal is preserving the trim-appropriate look by matching the car to its proper 16-inch, 17-inch, or 18-inch package. Once that is confirmed, series choice can refine the final presentation, but the overall character still begins with correct size and wheel fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 Kia Optima?
Yes, modifications can affect tire fitment on a 2020 Kia Optima. Wheel changes, altered wheel width, suspension lowering, spacer use, or body modifications can all change how a 205/65R16, 215/55R17, or 235/45R18 tire sits in the car. Even when the model year and trim seem straightforward, the actual setup on the vehicle can be different.
That is why it helps to inspect the current wheels rather than relying only on the badge or handbook. Look at the size on the sidewall, confirm the rim diameter, and make sure there is adequate clearance at full steering lock and normal suspension travel. A modified Optima should always be matched to the dimensions of the setup that is actually on the car.
What should I inspect before driving a 2020 Kia Optima on new tires?
Before driving a 2020 Kia Optima on new tires, inspect the wheels for damage, verify the tire size matches the wheel diameter, and check that all four tires are inflated properly. It is also smart to look for suspension or alignment issues that may have caused uneven wear on the previous set. Those checks help the new tires start service under the right conditions.
A short follow-up inspection after initial road use is worthwhile as well. Recheck air pressure, listen for rubbing or vibration, and make sure the steering feels consistent through turns and braking. On a car with more than one possible factory size, confirming that the installed tire matches the actual trim and wheel package can prevent a lot of avoidable trouble.
How often should tires on a 2020 Kia Optima be inspected?
Tires on a 2020 Kia Optima should be inspected regularly rather than only when a problem appears. A routine visual check for uneven wear, cuts, punctures, sidewall damage, and air loss can catch issues early. That matters on any daily-driven midsize sedan, especially one that may use different tire sizes depending on trim and wheel package.
Monthly pressure checks are a sensible baseline, and a closer inspection before longer trips adds another layer of caution. It also helps to monitor wear patterns across the tread, since they can point to alignment, balance, or suspension concerns. Staying ahead of those issues protects the new tires and helps the Optima drive the way its wheel and tire package was intended to drive.
