2023 Cadillac XT6 — Sport
The 2023 Cadillac XT6 Sport shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
235/55R20
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (129.3 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~30.2" |
| Revolutions per mile | ~668 |
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265/45R21
| Section width | 265 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (119.3 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~30.4" |
| Revolutions per mile | ~664 |
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What this size means for your Cadillac XT6
On the 2023 Cadillac XT6 Sport, the factory 235/55R20 measures about 30.2″ in overall diameter with a 129.3 mm (5.1″) sidewall, and completes roughly 668 revolutions per mile. Its 55-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a large-diameter fitment.
The 235/55R20 and 265/45R21 roll within 0.2″ (0.7%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
Other 2023 Cadillac XT6 trims
- Luxury 235/65R18 / 235/55R20
- Premium Luxury 235/55R20 / 265/45R21
Cadillac XT6 tire sizes by year
- 2025 Cadillac XT6 235/65R18 / 235/55R20
- 2024 Cadillac XT6 235/65R18 / 235/55R20
- 2022 Cadillac XT6 235/65R18 / 235/55R20
- 2021 Cadillac XT6 235/65R18 / 235/55R20
- 2020 Cadillac XT6 235/65R18 / 235/55R20
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.