The 2019 Kia K900 sits in a modern full-size luxury-sedan class where quiet cruising, long-wheelbase composure, and upscale road manners matter as much as straight-line performance. For this generation, tire fitment is tied to a staggered setup rather than a one-size arrangement. The front uses 245/45R19 and the rear uses 275/40R19, both in radial construction on 19-inch wheels. Available choices center on blackwall performance-oriented radial tires from BFGoodrich and Nitto across several g-Force and NT555 series options. The key decision is keeping the correct front-to-rear size pairing while choosing the tire character that best suits daily road use, replacement needs, and the vehicle's original luxury-sport balance.
Which Tire Size Is Right for The 2019 Kia K900
The 2019 Kia K900 uses two primary tire sizes, both on 19-inch rims, with fitment split by position rather than shared at all four corners. The first step is confirming whether you are replacing the front or rear tires, because 245/45R19 applies to the front and 275/40R19 applies to the rear. Once that is clear, the decision shifts to comparing radial tire series, brand choices, and rim-width compatibility within the correct size.
245/45R19 is a metric radial size in which 245 identifies the nominal section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 19 is the wheel diameter in inches. On the 2019 Kia K900, this size serves the front position and reflects the car's staggered tire layout. Available choices include blackwall radials from BFGoodrich and Nitto, including g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 lines. This is the size to evaluate when replacing front tires and when checking wheel width compatibility against the tire's published fitment range.
275/40R19 is a metric radial size with a 275-millimeter nominal section width, a 40-series profile, radial construction, and a 19-inch wheel diameter. On the 2019 Kia K900, this is the rear tire size, giving the car a wider rear fitment than the front. Product choices include blackwall radial tires from BFGoodrich and Nitto, with series such as g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This rear size should be matched carefully to the correct wheel width and used in the proper position rather than treated as an all-around replacement.
Sub-model fitment on the 2019 Kia K900 is position-specific rather than trim-dependent, with the covered front and rear applications using different sizes. Checking whether you are selecting a front or rear tire matters first, because the K900 does not use the same size at all four corners.
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2019 Kia K900 Luxury Front
The 2019 Kia K900 Luxury Front uses the smaller of the two staggered radial sizes on a 19-inch wheel. That means front-tire selection should focus on the correct front fitment, then compare blackwall performance-oriented options by brand, tire series, and rim-width suitability.
The 2019 Kia K900 Luxury Rear uses the wider rear radial size on a 19-inch wheel as part of the factory-style staggered layout. Rear-tire selection should stay with the proper rear size and account for the wider wheel-fitment range and the available differences among the BFGoodrich and Nitto tire lines.
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 2019 Kia K900 Tires for Sale
Available 2019 Kia K900 tire choices center on 19-inch blackwall radials from BFGoodrich and Nitto. Across the front and rear sizes, the product grid lets you compare g-Force and NT555 series options, along with differences in rim-width fitment, load figures where stated, and overall tire character.
Owners of a 2019 Kia K900 usually need clarity on the staggered front and rear tire sizes, 19-inch rim fitment, brand and series differences, and what to inspect before putting replacement tires into regular road use.
Tire Size & Fitment
What tire size fits a 2019 Kia K900?
The 2019 Kia K900 uses a staggered tire setup, not one size at all four corners. The front size is 245/45R19 and the rear size is 275/40R19, and both are radial tires designed for 19-inch wheels.
That means replacement starts with identifying the tire position before choosing a product. Mixing up the front and rear sizes can create fitment and handling problems, so the safer approach is to confirm what is mounted on each axle, verify the wheel size, and replace with the correct front-to-rear pairing unless the car has been changed from its original wheel and tire layout.
What size rim does a 2019 Kia K900 use?
Both primary tire sizes used on the 2019 Kia K900 fit 19-inch rims. The front 245/45R19 and rear 275/40R19 share the same rim diameter even though the tires differ in width and profile.
Rim diameter is only part of the fitment picture, so it still helps to confirm wheel width before selecting a tire. The available products in these sizes show different approved rim-width ranges, especially at the rear, and that matters if the car has aftermarket wheels or if you are replacing only one axle and want the tire to suit the wheel already on the car.
Why does the 2019 Kia K900 have more than one tire size?
The 2019 Kia K900 has more than one tire size because it uses a staggered setup with one size at the front and a wider size at the rear. In this application, 245/45R19 is used at the front and 275/40R19 is used at the rear.
A staggered arrangement means tire selection is tied to axle position rather than simply choosing any 19-inch tire. Owners replacing tires should confirm whether they are working on the front or rear, keep the correct pairing in place, and check that any replacement matches the wheel dimensions and intended use of the car, especially if different wheels have been installed at some point.
Choosing the Right Tire
What should I consider when choosing a 245/45R19 and 275/40R19 tire for a 2019 Kia K900?
Start with the correct staggered sizing, since the 2019 Kia K900 uses 245/45R19 in front and 275/40R19 in the rear. From there, compare radial tire construction details such as tire series, brand, sidewall style, and published rim-width compatibility for the wheel you are using.
The available options are all blackwall radials, but they still differ in character and specifications. A useful comparison includes whether you want to stay within one tire family front and rear, whether the wheel width falls within the tire's approved range, and whether stated load figures and tire weight matter for the way the car is driven and maintained.
What brands offer tires for the 2019 Kia K900?
Tires for the 2019 Kia K900 are available from BFGoodrich and Nitto in the covered front and rear sizes. Across 245/45R19 and 275/40R19, the available choices include several BFGoodrich g-Force series options and the Nitto NT555 G2.
Brand choice should still come after confirming the correct axle position and tire size. Once the front or rear size is established, compare each option by tire series, wheel-width suitability, and any stated load or weight information rather than assuming one brand is automatically the better match for every K900 owner or every wheel setup.
What tire series are available for the 2019 Kia K900?
The available tire series for the 2019 Kia K900 include BFGoodrich g-Force Comp 2 AS, g-Force Phenom T/A, g-Force Sport Comp 2, and Nitto NT555 G2. These series appear across the front 245/45R19 and rear 275/40R19 fitments, depending on size.
Series selection matters because it helps distinguish the type of tire you are comparing within the correct size. A good approach is to narrow the choice by axle position first, then compare which series are available in that exact size and whether the tire's wheel-width range, load information, and overall fit with the car's intended road use make sense for your K900.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Kia K900 restoration?
Yes, correct tire fitment still matters on a 2019 Kia K900 even though it is a much newer luxury sedan than most collector-era vehicles. The key point is preserving the proper staggered arrangement, with 245/45R19 at the front and 275/40R19 at the rear on 19-inch wheels.
Appearance on this car is less about wide whitewalls or vintage styling and more about maintaining the intended modern luxury-sport presentation. Keeping the correct size relationship front to rear helps the car look proportionate and avoids a mismatched stance, while careful product selection lets an owner stay closer to the original visual balance without treating every replacement tire as an exact factory duplicate.
How does tire construction affect the appearance of a restored 2019 Kia K900?
On the 2019 Kia K900, the primary fitment is radial, so construction changes are not part of a bias-ply-versus-radial restoration decision. Visually, the available choices here remain consistent in one important respect: they are blackwall radial tires suited to the car's modern upscale sedan profile.
That means the appearance decision comes more from maintaining the correct front and rear sizes and choosing a tire line that looks appropriate on a 19-inch luxury-sedan wheel. For owners aiming to keep the car close to its original presentation, the most useful checks are the tire's sidewall treatment, sizing, and overall proportional fit rather than chasing a vintage-style construction that does not apply here.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Kia K900?
Yes, modifications can affect tire fitment on a 2019 Kia K900, especially because the car uses different front and rear sizes. Changes such as aftermarket wheels, altered wheel widths, suspension lowering, or body modifications can change clearance and may affect whether 245/45R19 front and 275/40R19 rear tires remain appropriate.
A 19-inch diameter match alone is not enough when the car has been changed. It is wise to confirm actual wheel width, tire-to-fender clearance, steering clearance at the front, and suspension travel before installing replacement tires, particularly if the existing setup differs from the original staggered arrangement or if the new tire line has a different approved wheel-width range.
What should I inspect before driving a 2019 Kia K900 on new tires?
Before driving a 2019 Kia K900 on new tires, check that the front and rear sizes are mounted in the correct positions, confirm inflation is set properly for the installed tires and vehicle use, and inspect for any rubbing at full steering lock or over suspension movement. Wheel condition and valve condition also deserve attention.
It also helps to look over the rest of the car before regular road use. Uneven wear on the old tires, suspension looseness, alignment issues, or damaged wheels can shorten the life of the new set quickly, so a brief inspection after installation and another check after the first miles of driving can catch problems before they become expensive.
What should I check before a longer drive in a 2019 Kia K900?
Before a longer drive in a 2019 Kia K900, confirm the staggered tire sizes are correctly installed, check cold tire pressure, and inspect each tire for cuts, bulges, punctures, or unusual wear. It is also smart to verify that tread condition is even across both front tires and both rear tires.
Longer highway use puts more emphasis on overall condition than simple size match alone. A careful owner should also look at wheel condition, watch for slow air loss, and make sure the tires suit the wheels currently on the car, especially if the K900 has aftermarket rims or previous suspension work that could affect clearance or high-speed stability.
