Published by Rims & Tires
Compiled & checked by the site's publisher from manufacturer, NHTSA & USTMA data · Updated 2026-07-24
The Cadillac CT5 is GM's flagship rear-wheel-drive luxury sedan, positioned to compete with the BMW 5 Series and Mercedes E-Class. Tire choice on the CT5 follows the same split as those competitors: comfort-first touring for the base and Luxury trims, and max-grip summer or sport all-season rubber for the Sport and V-series variants.
CT5 tire sizes by trim
The CT5 Luxury and Premium Luxury trims use 245/45R18 on 18-inch wheels. The Sport and CT5-V run 245/40R19 on 19-inch wheels, with a 255/35R20 option on several trims. Only the CT5-V Blackwing uses a staggered fitment: 275/35R19 front, 305/30R19 rear. Verify your exact size on the driver door sticker.
All trims can be configured with RWD; AWD is available on non-V trims. RWD CT5 models wear tires differently than AWD ones. Rear tires shoulder acceleration forces and wear faster, especially if you drive spiritedly.
Best all-season tires for the CT5 base, Luxury, and Premium Luxury
Michelin Pilot Sport All Season 4: the top pick for CT5 owners on 18 or 19-inch wheels who want both sport feel and all-weather capability. Available in 245/45R18 and 245/40R19, with excellent wet braking, low road noise, and a published UTQG treadwear rating of 540.
Continental PureContact LS: the quietest all-season in CT5 sizes. Best for buyers who want a quiet, composed Cadillac ride rather than a sport bias, with a smooth highway feel and strong wet-weather scores.
Bridgestone Turanza Quiettrack: a strong quiet-touring alternative for highway-heavy commuters. Noise suppression is the standout quality here.
Goodyear Eagle F1 Asymmetric 6: a sport-touring option that splits the difference between the Michelin PSAS4 and a pure touring tire. It corners better dry than the PureContact, at a competitive price.
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Best summer tires for the CT5 Sport and CT5-V
Michelin Pilot Sport 4S: the benchmark summer tire for the CT5 Sport and CT5-V. It delivers exceptional dry grip and strong wet traction for a max-performance compound, in 245/40R19 and common V-series sizes. The right choice for Sport and V owners who want to find the CT5's actual chassis limits.
Continental SportContact 7: Continental's flagship summer tire, competing directly with the PS4S. Independent tests show comparable performance, so choose based on availability and price.
Pirelli P Zero: Pirelli's flagship summer tire for the CT5 in performance trims, with very strong dry grip. Available in many CT5-V fitments, it's a competitive alternative to the Michelin for V-series owners.
Best Tires for the Cadillac CT5 at a glance
| Trim | Tire | Best For |
|---|---|---|
| all-season tires for the CT5 base, Luxury, and Premium Luxury | Michelin Pilot Sport All Season 4 | the top pick for CT5 owners on 18 or 19-inch wheels who want both sport feel and all-weather capability. Available in 245/45R18 and 245/40R19, with excellent wet braking, low road noise, and a published UTQG treadwear rating of 540. |
| all-season tires for the CT5 base, Luxury, and Premium Luxury | Continental PureContact LS | the quietest all-season in CT5 sizes. Best for buyers who want a quiet, composed Cadillac ride rather than a sport bias, with a smooth highway feel and strong wet-weather scores. |
| all-season tires for the CT5 base, Luxury, and Premium Luxury | Bridgestone Turanza Quiettrack | a strong quiet-touring alternative for highway-heavy commuters. Noise suppression is the standout quality here. |
| all-season tires for the CT5 base, Luxury, and Premium Luxury | Goodyear Eagle F1 Asymmetric 6 | a sport-touring option that splits the difference between the Michelin PSAS4 and a pure touring tire. It corners better dry than the PureContact, at a competitive price. |
| summer tires for the CT5 Sport and CT5-V | Michelin Pilot Sport 4S | the benchmark summer tire for the CT5 Sport and CT5-V. It delivers exceptional dry grip and strong wet traction for a max-performance compound, in 245/40R19 and common V-series sizes. The right choice for Sport and V owners who want to find the CT5's actual chassis limits. |
| summer tires for the CT5 Sport and CT5-V | Continental SportContact 7 | Continental's flagship summer tire, competing directly with the PS4S. Independent tests show comparable performance, so choose based on availability and price. |
| summer tires for the CT5 Sport and CT5-V | Pirelli P Zero | Pirelli's flagship summer tire for the CT5 in performance trims, with very strong dry grip. Available in many CT5-V fitments, it's a competitive alternative to the Michelin for V-series owners. |
Frequently asked
What tire size does the Cadillac CT5 use?
CT5 Luxury and Premium Luxury (18-inch): 245/45R18. CT5 Sport and CT5-V (19-inch): 245/40R19, with a 255/35R20 option on some builds. CT5-V Blackwing: staggered 275/35R19 front / 305/30R19 rear. Verify your exact sizes on the driver door sticker.
How much do Cadillac CT5 tires cost?
245/45R18: $130 to $185 per tire. 245/40R19: $150 to $210 per tire. A full set of four in 245/45R18 installed runs $520 to $740. CT5-V staggered sets run higher depending on size.
Does the CT5 need special tires for RWD?
No special type is required, but RWD CT5 owners should expect rear tires to wear faster than fronts. Replace rears as a pair and keep tread depths matched across each axle — Georgia's legal minimum tread depth is 2/32 inch, but on a performance sedan like the CT5-V, wet grip falls off well before you hit that limit. Staggered setups can't be rotated front to rear, so budget for rear-only replacement more often.
Should I run summer or all-season tires on my CT5?
It depends on how you use it. If the CT5 is your year-round daily in West Georgia, a sport all-season gives you most of the grip while keeping the cold-weather safety that summer tires give up below about 45 degrees. If you've got a performance version and chase grip in the warm months, dedicated summer rubber is sharper — just don't leave it on through a cold snap.
How do I know when my CT5 needs new tires?
Do the penny test, and on a performance sedan pay extra attention to how it feels in the rain — wet grip fades well before the tread hits the legal limit. Watch for cracking and uneven wear, and check the rears first on a rear-drive CT5, since they do the work and wear faster. Older tires deserve a look regardless of tread depth.
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Last updated 2026-07-24. General guidance only — confirm specifics with a local shop for your exact vehicle.