2015 Cadillac Cadillac ATS — Coupe 3.6L Performance
The 2015 Cadillac Cadillac ATS Coupe 3.6L Performance 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.
225/40R18
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (90 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.1" |
| Revolutions per mile | ~804 |
- Check 225/40R18 price at TireRack
- Check 225/40R18 price at SimpleTire
- Check 225/40R18 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
255/35R18
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (89.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25" |
| Revolutions per mile | ~806 |
- Check 255/35R18 price at TireRack
- Check 255/35R18 price at SimpleTire
- Check 255/35R18 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
Other 2015 Cadillac Cadillac ATS trims
- Coupe 2.0L Turbo Luxury 225/40R18 / 255/35R18
- Coupe 2.0L Turbo Performance 225/40R18 / 255/35R18
- Coupe 2.0L Turbo Premium 225/40R18 / 255/35R18
- Coupe 2.0L Turbo Standard 225/40R18 / 255/35R18
- Coupe 3.6L Luxury 225/40R18 / 255/35R18
- Coupe 3.6L Premium 225/40R18 / 255/35R18
- Sedan 2.0L Turbo Luxury 225/45R17 / 225/40R18
- Sedan 2.0L Turbo Performance 225/45R17 / 225/40R18
- Sedan 2.0L Turbo Premium AWD 225/40R18
- Sedan 2.0L Turbo Premium RWD 225/40R18 / 255/35R18
- Sedan 2.0L Turbo Standard 225/45R17
- Sedan 2.5L Luxury 225/45R17
- Sedan 2.5L Standard 225/45R17
- Sedan 3.6L Luxury 225/45R17 / 225/40R18
- Sedan 3.6L Performance 225/45R17 / 225/40R18
- Sedan 3.6L Premium AWD 225/45R17 / 225/40R18
- Sedan 3.6L Premium RWD 225/40R18 / 255/35R18
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.