The 2017 Kia K900 sits in a small class of full-size Korean luxury sedans that emphasized quiet highway comfort, rear-wheel-drive balance, and understated presence instead of flashy branding. For owners, tire selection matters because this sedan uses more than one factory fitment depending on configuration. V6 Luxury and V6 Premium models use 245/50R18 tires, while the V8 setup uses staggered 19-inch sizes with 245/45R19 in front and 275/40R19 in the rear. Available choices range from blackwall performance radials to RWL and redline styles in the 18-inch size, so the right pick depends on the exact sub-model, wheel diameter, and whether the goal is luxury touring use or a more assertive appearance.
Which Tire Size Is Right for The 2017 Kia K900
Three tire sizes apply to the 2017 Kia K900, and the correct choice depends on both sub-model and wheel diameter. V6 models use an 18-inch tire, while the V8 configuration uses a staggered 19-inch setup with different front and rear sizes. The first step is confirming whether the car is a V6 Luxury or Premium model, or a V8 with separate front and rear fitments.
245/50R18 is a metric radial size that denotes a 245-millimeter nominal section width, a 50-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2017 Kia K900, this size is the primary fitment for V6 Luxury and V6 Premium models. In this size, the available choices focus on Pro-Trac Street Pro III tires with either raised white letters or a redline sidewall, giving the buyer a noticeable appearance decision within the same basic fitment. This size is the right starting point when the car retains its 18-inch V6 wheel setup and the goal is selecting the preferred sidewall presentation.
245/45R19 is a metric radial size with a 245-millimeter nominal section width, a 45-series profile, and a 19-inch rim diameter. On the 2017 Kia K900, this size serves as the front tire on the V8 Luxury staggered setup rather than as a universal fitment across the model line. Available tires in this size come from BFGoodrich and Nitto, primarily in blackwall performance-oriented series such as g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This is the size to evaluate when confirming the front axle fitment on a V8 car equipped with 19-inch wheels.
275/40R19 is a metric radial size that uses a wider 275-millimeter nominal section width, a 40-series profile, and a 19-inch rim diameter. On the 2017 Kia K900, it is the rear tire size for the V8 Luxury staggered arrangement, pairing with 245/45R19 at the front. The available selection includes blackwall radial options from BFGoodrich and Nitto across g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 series. This size matters most when the K900 has its original staggered V8 wheel layout and rear-wheel fitment needs to be matched correctly.
Sub-model fitment on the 2017 Kia K900 is not one-size-fits-all. V6 models share the same 18-inch tire size, while the V8 uses a staggered 19-inch front and rear setup, so identifying the exact configuration is essential before choosing tires.
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2017 Kia K900 V6 Luxury
The 2017 Kia K900 V6 Luxury uses a single 245/50R18 radial tire size at all four corners. Tire selection here is mainly about choosing the preferred sidewall style and confirming that the car still retains its original 18-inch wheel setup.
The 2017 Kia K900 V6 Premium also uses 245/50R18 radial tires, keeping fitment straightforward when the factory wheel diameter remains in place. The main decision is whether to stay with the available appearance-focused options such as RWL or redline styling.
The front axle of the 2017 Kia K900 V8 Luxury uses 245/45R19 radial tires as part of a staggered setup. Tire choice should be made with the matching rear size in mind so the car keeps the intended front-to-rear relationship on its 19-inch wheels.
The rear axle of the 2017 Kia K900 V8 Luxury uses a wider 275/40R19 radial tire. That rear-specific fitment means buyers should confirm they are selecting for the back of the staggered V8 package rather than assuming the same size is used at all four corners.
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 2017 Kia K900 Tires for Sale
Available 2017 Kia K900 tires span Pro-Trac, BFGoodrich, and Nitto, with choices varying by size, tire series, and sidewall treatment. The 18-inch fitment adds RWL and redline styling, while the 19-inch V8 sizes focus on blackwall performance radials with differing rim-width specifications and load figures.
These FAQs cover the exact tire sizes used on the 2017 Kia K900, how V6 and V8 fitment differs, what the size codes mean, and what to inspect before putting a luxury sedan like this back on the road.
Tire Size & Fitment
What tire size fits a 2017 Kia K900?
The 2017 Kia K900 uses three tire sizes, depending on sub-model and axle position. V6 Luxury and V6 Premium models use 245/50R18. The V8 Luxury uses a staggered 19-inch setup with 245/45R19 on the front and 275/40R19 on the rear.
That means the first step is identifying whether the car is a V6 or V8 and whether it still has its original wheel package. A V8 owner should also confirm front versus rear before ordering, since the two 19-inch sizes are not interchangeable positions within the staggered setup.
What size rim does a 2017 Kia K900 use?
The 2017 Kia K900 uses either 18-inch or 19-inch rims, depending on configuration. The 245/50R18 fitment uses an 18-inch rim, while both 245/45R19 and 275/40R19 use 19-inch rims on the V8 staggered arrangement.
Wheel diameter needs to be confirmed before choosing a tire, especially on cars that may have had wheel changes over time. On the V8, rim diameter alone is not enough, because the front and rear also use different tire widths and profiles within the same 19-inch wheel family.
Why does the 2017 Kia K900 have more than one tire size?
The 2017 Kia K900 has more than one tire size because the V6 and V8 models use different wheel and tire packages. The V6 models run a uniform 245/50R18 fitment, while the V8 Luxury uses a staggered setup with narrower front tires and wider rear tires on 19-inch wheels.
That distinction affects more than simple size selection. It changes how the car should be matched front to rear, and it also changes the range of available tire styles and series. Checking the exact sub-model and axle position avoids ordering a tire that matches the rim diameter but not the intended placement.
Choosing the Right Tire
What should I consider when choosing a 245/50R18 tire for a 2017 Kia K900?
For a 2017 Kia K900 using 245/50R18 tires, the main considerations are keeping the correct 18-inch fitment and deciding which sidewall presentation suits the car. In this size, the available Pro-Trac Street Pro III options come in RWL and redline versions, both in radial construction.
That makes the decision less about basic fitment and more about how the sedan is used and how it should look. A cleaner, more subtle presentation may call for one sidewall style, while a more custom or performance-oriented appearance may point to the other. Verifying the car still wears its original 18-inch wheels remains important.
What sidewall styles are available for 2017 Kia K900 tires?
Sidewall style depends on the tire size used on the 2017 Kia K900. In 245/50R18, available choices include RWL and redline. In the 19-inch V8 sizes, the available products are blackwall radials, giving that setup a more contemporary performance-oriented appearance.
That means sidewall style can help confirm whether the goal is visual character or a more understated look. Owners of V6 models have the most visible sidewall choice, while V8 buyers are choosing primarily among blackwall performance-series tires. Sidewall preference should always come after confirming the exact size required by the car.
What brands offer tires for the 2017 Kia K900?
Tires for the 2017 Kia K900 are available from Pro-Trac, BFGoodrich, and Nitto, depending on size. The 18-inch V6 fitment is represented by Pro-Trac Street Pro III options, while the 19-inch V8 front and rear sizes include BFGoodrich g-Force series tires and Nitto NT555 G2 options.
Brand choice should be considered alongside the exact tire size, sidewall style, and series offered in that size. Not every brand appears in every K900 fitment, so the right comparison is within the correct size for the specific sub-model. It also helps to review rim-width guidance when comparing among the available 19-inch products.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Kia K900?
A period-style approach on a 2017 Kia K900 starts with preserving the correct factory fitment pattern for the exact sub-model. That means 245/50R18 on V6 Luxury and V6 Premium cars, or the staggered 245/45R19 front and 275/40R19 rear arrangement on the V8 Luxury.
Once the size is right, appearance becomes the next decision. The 18-inch fitment offers more expressive sidewall treatments, while the 19-inch V8 setup leans toward blackwall performance radials. Owners aiming for an authentic showroom-era presentation should also consider original wheel style and overall visual balance, not just the tire alone.
How does tire construction affect the appearance of a restored 2017 Kia K900?
On the 2017 Kia K900, construction does not create a bias-ply versus radial appearance decision because the primary fitments are all radial. The visual difference comes more from the tire series and sidewall treatment available in a given size, especially the contrast between blackwall, RWL, and redline options.
That gives owners room to shape the car's character without moving away from the correct basic construction type. A blackwall tire can keep the K900 looking more formal and modern, while RWL or redline styling adds more visual presence. The best result usually comes from matching the sidewall style to the wheel design and intended overall presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Kia K900?
Yes, modifications can affect tire fitment on a 2017 Kia K900 even when the tire size itself is correct for the model. Aftermarket wheels, altered wheel widths, offset changes, suspension modifications, or lowering can all change clearance at the fender, suspension, or steering components.
That matters most on the V8 Luxury because its 19-inch setup is staggered and already uses different front and rear sizes. Any owner working with non-original wheels should verify wheel diameter, width, and tire-to-body clearance before road use. A tire that matches the stock size code still needs to suit the car's actual current setup.
What should I inspect before driving a 2017 Kia K900 on new tires?
Before driving a 2017 Kia K900 on new tires, inspect wheel condition, valve stems, and the overall installation to confirm the correct size is mounted in the correct position. Tire pressure should be set properly, and the owner should check for any interference at full steering lock and through normal suspension travel.
A short initial road test is also worthwhile to watch for vibration, pull, or contact that may point to a wheel, balance, or clearance issue. On staggered V8 cars, front and rear placement deserves extra attention so the 245/45R19 and 275/40R19 sizes stay in their intended positions.
How often should tires on a 2017 Kia K900 be inspected?
Tires on a 2017 Kia K900 should be inspected regularly, especially if the car is driven infrequently or stored for extended periods. Look for air loss, uneven tread wear, cuts, bulges, sidewall cracking, and any signs that the tires are aging before the next drive.
Routine inspections are especially useful on a full-size luxury sedan because tire condition affects both ride quality and high-speed stability. It also helps to check pressures before longer trips and after seasonal storage. Owners with staggered V8 fitment should monitor front and rear tires separately, since the sizes and available load characteristics differ.
