The 2017 Cadillac XTS sits at the end of Cadillac’s full-size front-drive luxury sedan era, blending long-wheelbase comfort with a more modern stance than many traditional American flagship cars. Buyers often look at the XTS as a road car first, but trim level matters immediately when tire fitment is involved. The 2017 Cadillac XTS uses radial tires in two primary sizes, 245/45R19 and 245/40R20, depending on the sub-model. That creates a real choice not just in size, but also in wheel diameter, tire series, and sidewall treatment. Getting the right tire starts with confirming the exact trim and whether the car still carries its original wheel setup.
Which Tire Size Is Right for The 2017 Cadillac XTS
The 2017 Cadillac XTS uses two primary tire sizes, and the correct one depends on the sub-model and wheel diameter. Most trims use 245/45R19 on a 19-inch rim, while Platinum and V-Sport trims use 245/40R20 on a 20-inch rim. Before comparing tires, the first step is confirming the exact trim level and verifying which wheel package is currently on the car.
A 245/45R19 tire uses a 245-millimeter nominal section width, a 45-series aspect ratio, radial construction, and a 19-inch rim diameter. On the 2017 Cadillac XTS, this is the standard fitment for Base, Luxury, Premium, and Premium Luxury models, making it the core touring-oriented size for the lineup. Available choices include BFGoodrich and Nitto blackwall radials across series such as g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. This size is the right place to start when the car retains its 19-inch wheels and the goal is a proper trim-specific replacement rather than a wheel-package change.
Fit(s): Platinum, Vsport Platinum, and Vsport Premium Luxury
Construction: Radial|Rim: 20 in
A 245/40R20 tire keeps the same 245-millimeter nominal width but uses a shorter 40-series profile on a 20-inch rim, still in radial construction. On the 2017 Cadillac XTS, this size belongs to Platinum, Vsport Platinum, and Vsport Premium Luxury models, so it should not be treated as a universal fitment for every XTS. Product choices include blackwall options from BFGoodrich and Nitto, plus Pro-Trac Street Pro III versions in raised white letter and redline sidewall treatments. This size deserves close attention when appearance matters as much as fitment, especially on trims delivered with 20-inch wheels.
Sub-model fitment on the 2017 Cadillac XTS is not the same across the lineup. Most trims use the 19-inch tire package, while Platinum and V-Sport variants move to a 20-inch setup, so identifying the exact sub-model is essential before choosing a replacement tire.
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2017 Cadillac XTS Base
The 2017 Cadillac XTS Base uses the 245/45R19 radial tire size. Tire selection centers on choosing the right 19-inch radial option for the car’s current wheel setup and intended driving use.
The 2017 Cadillac XTS Luxury uses the same 245/45R19 radial size as several other non-20-inch trims. That keeps replacement straightforward, provided the car still carries its original 19-inch wheels and has not been changed to another package.
The 2017 Cadillac XTS Platinum uses the 245/40R20 radial tire size rather than the 19-inch fitment found on most other trims. Tire choice starts with confirming the 20-inch wheel package, then comparing available sidewall styles and series within that size.
The 2017 Cadillac XTS Premium uses the 245/45R19 radial tire size. Buyers replacing tires on this trim can focus on 19-inch radial choices and then compare brand, series, and rim-width compatibility where applicable.
The 2017 Cadillac XTS Premium Luxury also uses the 245/45R19 radial size. That makes fitment more straightforward than the 20-inch trims, but the wheel size should still be confirmed if the car has seen aftermarket changes.
The 2017 Cadillac XTS Vsport Platinum uses the 245/40R20 radial size. Replacement decisions here focus on the 20-inch package, including whether the goal is a conventional blackwall look or a more distinctive sidewall presentation.
The 2017 Cadillac XTS Vsport Premium Luxury uses the same 245/40R20 radial size as the other 20-inch trims. Selecting a tire means staying with the correct wheel diameter first, then comparing the available series and sidewall treatments in that size.
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 Cadillac XTS Tires for Sale
Available 2017 Cadillac XTS tire choices center on 245/45R19 and 245/40R20 radial fitments from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare blackwall tires across several series, while the 20-inch size also adds raised white letter and redline sidewall treatments.
Common 2017 Cadillac XTS tire questions usually come down to trim-specific size selection, 19-inch versus 20-inch wheel fitment, and how to compare the available radial tire series and sidewall choices before replacing a set.
Tire Size & Fitment
What tire size fits a 2017 Cadillac XTS?
The 2017 Cadillac XTS uses two primary tire sizes: 245/45R19 and 245/40R20. Base, Luxury, Premium, and Premium Luxury models use 245/45R19, while Platinum, Vsport Platinum, and Vsport Premium Luxury models use 245/40R20.
The key is matching the tire to the exact trim and wheel diameter rather than treating every XTS the same. A quick check of the current tire sidewall and wheel size helps confirm whether the car still carries the original setup or has been changed to another package.
What size rim does a 2017 Cadillac XTS use?
A 2017 Cadillac XTS uses either a 19-inch or 20-inch rim, depending on the sub-model. The 245/45R19 fitment belongs on a 19-inch rim, while the 245/40R20 fitment belongs on a 20-inch rim.
Wheel diameter should be confirmed before choosing a tire because the XTS does not use one universal rim size across the lineup. Checking the wheel itself and the tire size already mounted on the car is especially important if the vehicle has had aftermarket wheels or trim-level wheel swaps.
Do all 2017 Cadillac XTS sub-models use the same tire size?
No, 2017 Cadillac XTS sub-models do not all use the same tire size. Most trims use 245/45R19, but Platinum and V-Sport variants use 245/40R20, so tire fitment changes with the trim.
That difference matters because it affects wheel diameter as well as the tire you can compare in the product range. Once the sub-model is confirmed, tire selection becomes much simpler and the buyer can focus on brand, series, sidewall style, and rim-width compatibility within the correct size.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Cadillac XTS?
Start with the correct size for the exact trim: 245/45R19 for most models or 245/40R20 for Platinum and V-Sport versions. From there, compare radial construction details such as tire series, rim-width compatibility where stated, sidewall style, and load information when it is available.
The best choice depends on how the car is used and whether it still has its original wheels. A buyer replacing worn factory-size tires on a stock sedan may prioritize a straightforward blackwall option, while someone refining appearance may pay closer attention to sidewall treatment and series within the correct fitment.
What sidewall styles are available for 2017 Cadillac XTS tires?
Sidewall style depends on the size. The 245/45R19 offerings are blackwall, while the 245/40R20 size includes blackwall choices as well as raised white letter and redline versions through the Pro-Trac Street Pro III line.
That makes the 20-inch fitment the broader appearance category if the goal is something other than a standard blackwall presentation. Sidewall style should always be selected after confirming the correct trim and wheel diameter, since a preferred look does not override the need for the proper tire size.
What brands offer tires for the 2017 Cadillac XTS?
Tires for the 2017 Cadillac XTS are available from BFGoodrich, Nitto, and Pro-Trac, depending on size. BFGoodrich and Nitto appear in both primary fitments, while Pro-Trac is available in the 245/40R20 size with distinctive sidewall treatments.
Brand comparison should be done within the correct XTS tire size rather than across the whole lineup. Once the trim and wheel diameter are confirmed, the useful differences become series, sidewall style, and compatibility details such as the rim-width ranges shown on certain products.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Cadillac XTS?
A period-style 2017 Cadillac XTS tire choice starts with keeping the correct factory-era size for the trim, either 245/45R19 or 245/40R20. Since the XTS is a modern luxury sedan rather than a vintage restoration candidate, the visual decision is usually less about historic authenticity and more about preserving the car’s intended overall presentation.
For most trims, a blackwall radial keeps the appearance closest to how the car was commonly seen when new. On 20-inch models, raised white letter or redline sidewalls create a more customized look, so they suit an owner seeking visual distinction rather than a restrained luxury-sedan appearance.
How does tire construction affect the appearance of a restored 2017 Cadillac XTS?
Tire construction is straightforward on the 2017 Cadillac XTS because the primary fitments are radial. That means the appearance difference comes less from bias-ply versus radial construction and more from the tire’s sidewall styling, series character, and whether the car wears 19-inch or 20-inch wheels.
A blackwall radial keeps the look clean and contemporary, which generally aligns with the XTS’s original era. Raised white letter and redline treatments on the 20-inch size push the car toward a more personalized presentation, so the right choice depends on whether the goal is stock-style restraint or a custom visual accent.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Cadillac XTS?
Yes, modifications can affect tire fitment on a 2017 Cadillac XTS. Wheel changes, altered offsets, suspension lowering, and trim-level wheel swaps can all change how a 245/45R19 or 245/40R20 tire sits in the wheelwell and how much steering or suspension clearance remains.
That is why the current setup matters as much as the original trim designation. A car wearing aftermarket wheels should have its actual wheel diameter and width checked before replacement, and any rubbing history around the fenders, inner liners, or suspension should be reviewed before selecting a new tire.
What should I inspect before driving a 2017 Cadillac XTS on new tires?
Before driving a 2017 Cadillac XTS on new tires, inspect inflation pressure, wheel condition, lug hardware, and basic clearance at the fenders and suspension. It is also smart to look for uneven wear patterns on the old tires, since they can point to alignment or suspension issues that may affect the new set.
A brief road check after installation helps confirm there is no vibration, pulling, or contact during turns. The XTS uses two different wheel-and-tire packages across the lineup, so verifying that the new tires match the actual wheels on the car is just as important as the condition inspection itself.
How often should tires on a 2017 Cadillac XTS be inspected?
Tires on a 2017 Cadillac XTS should be inspected regularly for pressure loss, tread wear, cuts, bulges, and sidewall damage. Cars that are driven infrequently still need routine checks, since age, storage conditions, and long periods of sitting can affect tire condition even when tread depth looks acceptable.
A practical habit is to inspect the tires before longer drives and any time the car has been parked for an extended period. Paying attention to wear across the tread is especially useful because it can reveal alignment or suspension concerns before they shorten the life of a new 19-inch or 20-inch set.
