2016 Cadillac XTS — 3.6L Twin Turbo AWD V-Sport Premium
The 2016 Cadillac XTS 3.6L Twin Turbo AWD V-Sport Premium came from the factory equipped with 245/40R20 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
245/40R20
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (98 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~27.7" |
| Revolutions per mile | ~728 |
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What this size means for your Cadillac XTS
On the 2016 Cadillac XTS 3.6L Twin Turbo AWD V-Sport Premium, the factory 245/40R20 measures about 27.7″ in overall diameter with a 98 mm (3.9″) sidewall, and completes roughly 728 revolutions per mile. Its 40-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a large-diameter fitment.
Other 2016 Cadillac XTS trims
- 3.6L AWD Luxury 245/45R19
- 3.6L AWD Platinum 245/45R19 / 245/40R20
- 3.6L AWD Premium 245/45R19 / 245/40R20
- 3.6L FWD Luxury 245/45R19
- 3.6L FWD Platinum 245/45R19 / 245/40R20
- 3.6L FWD Premium 245/45R19 / 245/40R20
- 3.6L FWD Standard 245/45R19
- 3.6L Twin Turbo AWD V-Sport Platinum 245/40R20
Cadillac XTS tire sizes by year
- 2019 Cadillac XTS 245/45R19
- 2018 Cadillac XTS 245/45R19
- 2017 Cadillac XTS 245/45R19
- 2015 Cadillac XTS 245/45R19
- 2014 Cadillac XTS 245/45R19
- 2013 Cadillac XTS 245/45R19
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.