The 2020 Cadillac CT5 tire size depends on trim: the Sport, RWD takes 245/40R19 94V; the Luxury, 4WD takes 245/45R18 96V; the Premium Luxury, 3.0L Eng VIN W, 4WD takes 245/45R18 96V; the Premium Luxury, 2.0L Eng VIN K, 4WD takes 245/45R18 96V; the Premium Luxury, 3.0L Eng VIN W, RWD takes 245/45R18 96V; the Luxury, RWD takes 245/45R18 96V; the V, RWD takes 245/40ZR19 94Y; the Premium Luxury, 2.0L Eng VIN K, RWD takes 245/45R18 96V; the Sport, 4WD takes 245/40R19 94V; the V, 4WD takes 245/40ZR19 94Y, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
Sport, RWD: 245/40R19 94V
Luxury, 4WD: 245/45R18 96V
Premium Luxury, 3.0L Eng VIN W, 4WD: 245/45R18 96V
Premium Luxury, 2.0L Eng VIN K, 4WD: 245/45R18 96V
Premium Luxury, 3.0L Eng VIN W, RWD: 245/45R18 96V
Luxury, RWD: 245/45R18 96V
V, RWD: 245/40ZR19 94Y
Premium Luxury, 2.0L Eng VIN K, RWD: 245/45R18 96V
Where to Buy & Install Tires for Your 2020 Cadillac CT5
Worried about mounting? You don't need to haul tires in your trunk. Choose direct-to-installer delivery, mobile installation at your home, or front-door delivery:
⭐ Recommended · Ship to Local Shop
Tire Rack
Zero-hassle installation network across the US.
✓Free delivery to 10,000+ local shops (Firestone, Discount Tire & local mechanics)
✓Mobile installation vans available — they mount & balance in your driveway
✓Free 2-year road hazard warranty included on most eligible tires
✓Pre-set, guaranteed installation rates — no surprise shop markups