Recorded OEM specifications for the 2015 Cadillac CTS, donor years with overlapping ranges, and a calculator to compare a selected wheel. Range overlap is not a guaranteed fit.
Baseline mounting dimensions used for interchange decisions.
Multiple OEM configurations exist for this vehicle. Fitment can vary by trim, brakes, and factory wheel package – confirm your exact setup before buying.
Thread-only product links are shopping examples, not verified fits. Seat style is not confirmed here. As an Amazon Associate we earn from qualifying purchases.
These are vehicle-year records whose recorded OEM ranges overlap this 2015 Cadillac CTS. Overlap is not a guarantee that a specific wheel will install. Selected-wheel comparison is in the calculator below.
Evaluated 39 donor years. Listed 24 eligible overlaps (not all evaluated years are compatible). Showing all listed.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Approximate position vs the mid OEM package: outer change -2.68 mm, inner change -3.68 mm. This uses aggregated width/offset ranges, not a specific wheel.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Dataset suggestionWheel spacer ≈ 22.03 mm – not a verified installation requirement.
A spacer of about 22.03 mm is a dataset suggestion only; clearance is not verified. Estimated outer position is about 22.03 mm farther inward than the mid OEM package.
Recorded vehicle-side thread for the 2015 Cadillac CTS is M14x1.5. This donor year is recorded as M12x1.5. That is the vehicle stud/nut thread, not an intrinsic thread stamped on the wheel. Hardware must match this vehicle’s studs and the selected wheel’s seat and engagement. Existing hardware may be reusable if it already matches. Seat style is not in this dataset, so products are not a verified fit.
Dataset suggestionWheel spacer ≈ 20.03 mm – not a verified installation requirement.
Hub-centric rings of about 70.3 → 66.9 mm mm may be relevant if the wheel bore is larger than the hub. A spacer of about 20.03 mm is a dataset suggestion only; clearance is not verified. Recorded vehicle-side thread differs (M12x1.5 on the donor year vs M14x1.5 on the target vehicle). Hardware must match the target vehicle’s studs and the selected wheel’s seat. Existing hardware may be reusable if it already matches. Seat style is not confirmed in this dataset.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Center-bore records disagree (donor year-level hub 67 mm vs trim range 66.9–66.9 mm). Unqualified overlap is not claimed until the conflict is resolved. Approximate position vs the mid OEM package: outer change -10.68 mm, inner change 4.33 mm. This uses aggregated width/offset ranges, not a specific wheel.
Approximate position vs the mid OEM package: outer change 7.68 mm, inner change -1.33 mm. This uses aggregated width/offset ranges, not a specific wheel.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Approximate position vs the mid OEM package: outer change 0.33 mm, inner change -6.68 mm. This uses aggregated width/offset ranges, not a specific wheel.
Approximate position vs the mid OEM package: outer change 0.33 mm, inner change -6.68 mm. This uses aggregated width/offset ranges, not a specific wheel.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Approximate position vs the mid OEM package: outer change -0.67 mm, inner change -5.68 mm. This uses aggregated width/offset ranges, not a specific wheel.
Years grouped because recorded compatibility evidence is equivalent. Each year keeps its own page.
Approximate position vs the mid OEM package: outer change -0.67 mm, inner change -5.68 mm. This uses aggregated width/offset ranges, not a specific wheel.
Only years with evidence-based interchange relationships are listed. Adjacent years are not assumed compatible.
Compare a donor vehicle or custom wheel against this 2015 Cadillac CTS. Use Compare in calculator on a donor row above to fill the donor side of this same calculator.
Compare wheel compatibility between two vehicles
2015 Cadillac CTS
Example products matched to recorded thread, hub, or spacer dimensions. They are not verified fits. Confirm seat style, thickness, and clearance before ordering.
M14 x 1.5
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →
M14 x 1.5 · Thread match only; seat style is not verified
View on Amazon →As an Amazon Associate we earn from qualifying purchases. Product availability and pricing may change.
The values below are provided data points for the 2015 Cadillac CTS. Trims and brake packages can vary, so some specs may differ across vehicles. If anything is unknown for your exact trim, use the on-page calculator and confirm against your owner manual or an OEM parts catalog before purchasing.
| Wheel Specs | |
|---|---|
| Bolt pattern | 5x120 |
| Center bore | 66.9 mm |
| Thread size | M14 x 1.5 |
| Rim diameter | 19 in |
| Rim width | 8.5 in |
| Offset | ET 34 mm |
| Backspacing | 5.59 in |
| Tire Specs | |
|---|---|
| Section width | 245 mm |
| Aspect ratio | 45 |
| Rim diameter | R17 |
Note: The wheel and tire values above reflect known OEM data points that may come from different trims. It is common for the CTS to have multiple OEM wheel and tire sizes. Verify your door jamb tire label and your current wheel markings to confirm your baseline.
The calculator lets you compare a donor vehicle setup against your CTS, and test custom wheel and tire sizes. Follow these steps:
Always confirm final fitment by measuring on the car and test-fitting a wheel. The calculator is a planning tool, not a substitute for physical verification.
Plus sizing increases wheel diameter and typically reduces tire sidewall height to keep overall tire diameter close to stock. The CTS often came with multiple OEM wheel sizes, so the best upgrade path depends on your starting size and brake clearance.
Because OEM sizes vary by trim, do not assume a single upgrade size fits all 2015 CTS models. Confirm with the calculator, measure on your car, and test-fit.
What is the bolt pattern on the 2015 Cadillac CTS?
5x120. That is 5 wheel studs on a 120 mm pitch circle diameter.
Is 5x120 the same as 5x120.7 or 5x4.75?
No. 5x120.7 is different and will not center correctly on a 5x120 hub. Do not attempt to fit mismatched patterns.
Do I need hub-centric rings?
If your aftermarket wheel has a larger center bore than the CTS hub, use rings with a 66.9 mm inner diameter to center the wheel on the hub and prevent vibration.
What offset range can I run safely?
It depends on wheel width, tire size, and brake package. Use the calculator to compare inner clearance and outer poke to your current setup, then test-fit on the car. Do not assume a universal range fits all trims.
Will changing rim diameter affect my speedometer?
Only if the overall tire diameter changes. Use the calculator to choose a tire size that keeps overall diameter close to your OEM size so speed and odometer remain accurate.
What lug nuts does the CTS use?
Thread size is M14 x 1.5. Seat type can vary by wheel. Verify the correct seat style for your wheels in the owner manual or wheel documentation.
Can I use 5x114.3 wheels with wobble bolts or adapters?
Wobble hardware is not recommended for this application. Quality hub-centric adapters that change both bolt pattern and center bore can work in some cases but add variables. If used, select adapters engineered for 5x120 hubs with 66.9 mm center bore and confirm brake and fender clearance carefully.
What tire sizes came stock on the 2015 CTS?
Multiple OEM sizes existed across trims. Known data points include a 245/45R17 tire and separate wheel specifications such as 19x8.5 ET34. Check your door jamb tire label and compare it to your current wheel markings to confirm your exact OEM size.
Wheel interchange depends on more than bolt pattern. Where data is available, this site compares recorded OEM values:
A normal wheel spacer does not change bolt pattern. Hub rings cannot enlarge a wheel bore that is smaller than the hub. Brake clearance and tire package fitment still require vehicle-specific checks when not confirmed in the dataset.
