The 2016 Cadillac CT6 arrived as Cadillac’s modern flagship sedan, blending full-size luxury presence with contemporary chassis engineering and a distinctly sharper driving character than many traditional luxury four-doors. That matters when it comes time to choose tires, because the CT6 uses three different primary radial sizes depending on trim and wheel package: 235/50R18, 245/45R19, and 245/40R20. The real decision is less about vintage construction and more about confirming the exact sub-model and wheel diameter, then comparing blackwall performance-oriented choices with select redline or raised white letter options in certain sizes. For a road-driven CT6, proper fitment starts with the car’s current wheel setup and intended look.
Which Tire Size Is Right for The 2016 Cadillac CT6
The 2016 Cadillac CT6 uses three primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All three are radial metric sizes, but they are tied to 18-inch, 19-inch, and 20-inch rims, so confirming the wheel currently on the car is the first step before comparing brands, sidewall styles, or tire series.
A 235/50R18 tire uses a 235-millimeter section width, a 50-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2016 Cadillac CT6, this size suits cars equipped with the smaller-wheel setup and keeps the decision centered on modern radial tire selection rather than construction changes. Available choices include BFGoodrich, Nitto, and Pro-Trac, with blackwall, redline, and raised white letter sidewall treatments appearing in this size. It is the right size to evaluate when the car carries 18-inch wheels and the goal is to balance fitment, appearance, and intended road use.
A 245/45R19 tire steps up to a 245-millimeter section width with a 45-series profile on a 19-inch rim, still in radial construction. For the 2016 Cadillac CT6, this size falls in the middle of the fitment range and is tied to specific trims or wheel configurations rather than the full model line. BFGoodrich and Nitto options are available here, with blackwall styling across several g-Force and NT555 G2 series choices. This is the size to consider when the car already has 19-inch wheels and the priority is staying with the proper rim diameter and overall fitment category.
A 245/40R20 tire keeps the 245-millimeter width but uses a lower 40-series profile on a 20-inch rim. On the 2016 Cadillac CT6, this size belongs to the largest-wheel fitment and gives the buyer the widest appearance choice among the available products in this application. Options include BFGoodrich, Nitto, and Pro-Trac, with blackwall, redline, and raised white letter treatments offered in this size. It is the correct size to review when the car is equipped with 20-inch wheels and the decision involves both wheel confirmation and the look of the finished installation.
Tire fitment on the 2016 Cadillac CT6 varies by sub-model, and some trims were offered with more than one wheel-and-tire combination. Identifying the exact trim and confirming whether the car has 18-inch, 19-inch, or 20-inch wheels is the key step before choosing a tire.
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2016 Cadillac CT6 Base
The 2016 Cadillac CT6 Base uses either 235/50R18 or 245/45R19 radial tires, so this trim does not point to one universal size by itself. Tire selection starts with confirming whether the car has 18-inch or 19-inch wheels, then comparing the available radial products within that size.
The 2016 Cadillac CT6 Luxury spans all three primary sizes: 235/50R18, 245/45R19, and 245/40R20, all in radial construction. That makes wheel verification especially important, since the choice is driven by the car’s actual wheel package rather than the trim name alone.
The 2016 Cadillac CT6 Platinum uses the 245/40R20 radial size, tying this sub-model to the 20-inch wheel setup. Tire selection then becomes a matter of choosing among the available brands, tire series, and sidewall treatments that suit the car’s appearance and use.
The 2016 Cadillac CT6 Premium Luxury uses either 245/45R19 or 245/40R20 radial tires. Choosing correctly means confirming whether the car is on 19-inch or 20-inch wheels first, then narrowing the options by sidewall style, tire series, and overall presentation.
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 2016 Cadillac CT6 Tires for Sale
Available 2016 Cadillac CT6 tires center on the three primary radial sizes and include BFGoodrich, Nitto, and Pro-Trac options. Buyers can compare g-Force and NT555 G2 performance-oriented series, plus blackwall styling throughout and redline or raised white letter choices in select 18-inch and 20-inch sizes.
These FAQs focus on the tire sizes used on the 2016 Cadillac CT6, how trim level and wheel diameter affect fitment, and how to compare available radial tire options by brand, sidewall style, and intended use.
Tire Size & Fitment
What tire size fits a 2016 Cadillac CT6?
The 2016 Cadillac CT6 uses three primary tire sizes: 235/50R18, 245/45R19, and 245/40R20. All three are radial sizes, and the correct one depends on the trim level and the wheel package on the car rather than the CT6 name alone.
The most important check is the actual wheel diameter currently on the vehicle. A Base, Luxury, or Premium Luxury car may use more than one size, so the quickest way to avoid a mismatch is to confirm whether the car has 18-inch, 19-inch, or 20-inch wheels before comparing tire options.
What size rim does a 2016 Cadillac CT6 use?
A 2016 Cadillac CT6 may use 18-inch, 19-inch, or 20-inch rims, depending on the sub-model and wheel setup. Those rim diameters correspond to 235/50R18, 245/45R19, and 245/40R20 tire sizes, all in radial construction.
Rim diameter should be confirmed before anything else because each tire size is built around a specific wheel size. It also helps to check wheel width when comparing actual tire products, especially if the car has replacement wheels, since product recommendations can vary within the same basic tire size.
Why does the 2016 Cadillac CT6 have more than one tire size?
The 2016 Cadillac CT6 has more than one tire size because fitment changes with trim and wheel package. Base, Luxury, and Premium Luxury versions can span multiple sizes, while the Platinum model uses 245/40R20.
That means trim name alone is not always enough to choose a tire. Wheel diameter is the deciding detail, and it should be checked on the car itself before selecting a replacement. Once the correct size is confirmed, the choice shifts to brand, tire series, sidewall style, and the look or driving character you want.
Choosing the Right Tire
What should I consider when choosing a 2016 Cadillac CT6 tire?
Start with the correct tire size for the car’s current wheels: 235/50R18, 245/45R19, or 245/40R20. From there, compare construction details that matter within the size, such as approved rim-width range, load capacity where stated, sidewall style, brand, and tire series.
The CT6 is a modern luxury sedan, so the right choice depends on how the car is used and how you want it to look. A blackwall performance-oriented tire gives one presentation, while redline or raised white letter options in select sizes create a more custom or enthusiast-oriented appearance.
What sidewall styles are available for 2016 Cadillac CT6 tires?
Sidewall choices for the 2016 Cadillac CT6 include blackwall across all three primary sizes, with redline and raised white letter options available in select 18-inch and 20-inch fitments. The 19-inch options stay within blackwall styling in the available product range.
That makes sidewall treatment part of the selection process once the correct tire size is confirmed. Buyers aiming for a clean modern look often stay with blackwall, while redline or raised white letter can change the car’s visual character without changing the underlying radial fitment category.
What brands offer tires for the 2016 Cadillac CT6?
Tires for the 2016 Cadillac CT6 are available from BFGoodrich, Nitto, and Pro-Trac in the supported sizes. Depending on the wheel diameter, choices include g-Force series products, the Nitto NT555 G2, and Pro-Trac Street Pro III offerings.
Brand alone should not be the only filter. It helps to compare which size each brand offers for your wheel diameter, whether the tire is available in blackwall, redline, or raised white letter form, and whether the rim-width guidance matches the wheel currently on the car.
Restoration & Appearance
Which tire should I choose for a period-style 2016 Cadillac CT6?
A period-style approach on a 2016 Cadillac CT6 still begins with the correct modern radial size for the car’s wheel package. From there, the most appearance-driven choices are sidewall treatment and tire series, especially in 235/50R18 and 245/40R20 where redline and raised white letter options are available.
Because the CT6 is a modern luxury sedan, appearance choices tend to be about presentation rather than strict restoration authenticity. Blackwall keeps a more understated look, while redline or raised white letter creates a more customized character. Wheel diameter should stay aligned with the car’s actual setup before focusing on style.
How does tire construction affect the appearance of a restored 2016 Cadillac CT6?
On the 2016 Cadillac CT6, construction does not create a bias-ply-versus-radial decision because the primary fitments are radial. Appearance is influenced more by the tire’s profile, sidewall treatment, and series character than by switching between different construction eras.
That keeps the visual decision centered on details like blackwall versus redline or raised white letter where available. For an owner refreshing a low-mile or collector-kept CT6, matching the tire size to the car’s wheel package first will do more for an authentic overall stance than chasing appearance cues in the wrong size.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2016 Cadillac CT6?
Yes. A 2016 Cadillac CT6 can be affected by aftermarket wheels, wheel-width changes, suspension lowering, or other chassis modifications even when the tire size itself looks close to stock. Fitment becomes especially sensitive when moving among the CT6’s 18-inch, 19-inch, and 20-inch wheel categories.
Any modified CT6 should be checked for wheel diameter, wheel width, and clearance at the fender, suspension, and steering range before new tires are chosen. A tire that matches the nominal size still needs to suit the actual wheel and the car’s present ride height and wheel placement.
What should I inspect before driving a 2016 Cadillac CT6 on new tires?
Inspect the wheel condition, confirm that the tire size matches the car’s current rim diameter, and make sure each tire is mounted on an appropriate wheel width. It also helps to check valve stems, alignment condition, and whether the tires clear the suspension and bodywork through normal steering travel.
After installation, keep an eye on air pressure, look for any signs of rubbing, and recheck the tires after the first miles of driving. On a CT6 that has sat for long periods, a full inspection of old tires, wheels, and suspension components is worthwhile before returning the car to regular road use.
How often should tires on a 2016 Cadillac CT6 be inspected?
Tires on a 2016 Cadillac CT6 should be inspected regularly for pressure loss, tread wear, cuts, bulges, and sidewall cracking. That matters whether the car is driven often or spends long stretches parked, because age and storage conditions can affect tires even when mileage stays low.
Collector-kept or lightly used cars deserve special attention before longer drives. A quick walk-around is helpful every time the car comes out, and a closer inspection at service intervals can catch uneven wear, aging, or wheel damage before it turns into a larger fitment or road-use problem.
