Cadillac ATS tire and wheel sizes
The Cadillac ATS was approved in Switzerland between 2013 and 2016 with tires from 225/45R17 to 275/35R18 on 17″, 18″ wheels. The most common sizes are 225/40R18, 255/35R18, 225/45R17. Some versions use different sizes front and rear (staggered fitment).
Sizes differ by engine, trim and market. Confirm with the tire placard (usually on the driver's door jamb), the owner's manual or the vehicle registration papers before buying tires or wheels.
Most common sizes
Cadillac ATS (2013–2016) type GMT166
23 approved versions, e.g. ATS 2.0 T, ATS COUPE 2.0T, ATS 2.0 T AWD, ATS COUPE 2.0TAWD.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 225/45R17 | Front & rear | 94V | 8Jx17 ET32/42 | 17 |
| 225/40R18 | Front & rear | 92V | 8Jx18 ET42 | 8 |
| 225/40R18 | Front | 88V | 8Jx18 ET32/42 | 17 |
| 235/40R18 | Front | 95V | 9Jx18 ET28 | 4 |
| 255/35R18 | Front | 94Y | 9Jx18 ET28 | 4 |
| 255/35R18 | Rear | 90V | 9Jx18 ET32/52 | 17 |
| 275/35R18 | Rear | 99Y | 9.5Jx18 ET36/48 | 4 |
How to read this table
Rim and offset uses the European notation: 7Jx17 ET45 is a 7-inch wide, 17-inch diameter wheel with a 45 mm offset. "Versions" is how many approved versions list that size — a rough guide to how common it is. Load / speed is the most frequent service description (for example 91V) among them; your car may require a higher one.
Showing 23 of 25 approvals: rare special versions are left out to keep the page readable. Records were read from the German-language text and checked against the French text; 100 % matched exactly.
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.