Research exists for 2 selected model year(s). Pick the year you actually own; a tire row never establishes a battery requirement for that year.
Documented model years
Tire research
| Year | Trim / option | Observed size | Axle | Service | Wheel / condition | Source ID |
|---|---|---|---|---|---|---|
| 2025 | Selected 2025 models — 18-inch all-season | 245/45R18 | front_rear | Not documented | 18-inch factory wheel (confirm installed package) | ADD03-S-OEM-CADILLAC-CT5 |
| 2025 | Selected 2025 models — 19-inch run-flat | 245/40R19 | front_rear | Not documented | 19-inch factory wheel (confirm installed package) | ADD03-S-OEM-CADILLAC-CT5 |
Battery research
| Year(s) | Engine / trim | Position | Observed group | Technology | Condition | Source ID |
|---|---|---|---|---|---|---|
| 2024 | L4 2.0L | primary_low_voltage | 94R/H7 | AGM | Not documented | ADD03-S-IB-POWERVOLT-GUIDE |
Before ordering tires
Read the driver-door tire placard. Match the installed wheel, axle, tire class, load index, speed rating and any OE marking. The size alone cannot approve a replacement SKU. Tire-sidewall maximum pressure is not your vehicle’s cold inflation pressure.
Before ordering a battery
Check the actual battery position, chemistry, voltage, terminals, tray, hold-down, vent, CCA requirement and any BMS registration procedure. Group size alone does not approve a replacement SKU. High-voltage traction batteries are outside this guide.
Sources and scope
- Cadillac / GM News — 2025 Cadillac CT5 product specifications (checked 2026-11-01)
- Interstate Batteries / PowerVolt — PowerVolt 2025 US automotive battery application guide (checked 2026-11-01)
Research checked November 2, 2026. A source-observed size is not final product fitment. Confirm the actual vehicle and current manufacturer guidance.