The Cadillac CT6 was the flagship luxury sedan from 2016 to 2020, competing against the BMW 7 Series and Mercedes-Benz S-Class with a lighter aluminum-intensive structure. Tire choice should match the CT6 character: refined, quiet, capable — with enough performance reserve to honor the optional Blackwing twin-turbo V8 on top trims.
Cadillac CT6 tire sizes by trim
CT6 Base and Luxury trims used 245/45R18 on 18-inch wheels. The Premium Luxury trim used 245/40R19 on 19-inch wheels. Platinum and Sport trims used a staggered setup: 245/40R20 front and 275/35R20 rear. The CT6-V Blackwing used 255/35ZR20 front and 285/30ZR20 rear.
The CT6 was discontinued after 2020 then briefly revived as a limited Blackwing edition through 2023. Always verify your exact size on the driver door sticker.
Best tires for CT6 Base and Luxury — 18-inch
Continental PureContact LS (245/45R18) — the top comfort pick for the CT6. Exceptionally quiet, smooth ride quality, strong all-season wet performance, and a 70,000-mile treadwear warranty. An excellent match for the Cadillac luxury character.
Michelin Pilot Sport All Season 4 (245/45R18) — the sport pick. Slightly firmer ride than the Continental but noticeably sharper steering feel and better handling response. Best for CT6 owners who drive with purpose.
Best tires for CT6 Premium, Sport, and Platinum — 19 and 20-inch
Michelin Pilot Sport All Season 4 (245/40R19, 245/40R20) — benchmark sport all-season for higher-trim CT6 owners. Outstanding dry and wet performance. Excellent for the 335 hp CT6 Premium Luxury.
Michelin Pilot Sport 4S (245/40R20, 275/35R20) — for staggered Sport and Platinum owners wanting maximum summer performance. The benchmark summer tire and a proper match for flagship-trim Cadillac.
Pirelli P Zero All Season Plus (245/40R19) — Pirelli ultra-high-performance all-season. Sport character leaning toward summer with all-weather usability. Available in CT6 19-inch sizes.
Frequently asked
What tire size does the Cadillac CT6 use?
CT6 Base/Luxury: 245/45R18. Premium Luxury: 245/40R19. Platinum/Sport staggered: 245/40R20 front, 275/35R20 rear. CT6-V Blackwing staggered: 255/35ZR20 front, 285/30ZR20 rear. Verify on the door sticker.
How much do Cadillac CT6 tires cost?
245/45R18: $130 to $195 per tire. 245/40R19: $155 to $225 per tire. 245/40R20: $175 to $260 per tire. 275/35R20 rear staggered: $195 to $290 per tire. A full set on 18-inch installed runs $520 to $780.
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Last updated 2026-06-27. General guidance only — confirm specifics with a local shop for your exact vehicle.