2009 Cadillac STS Wheel & Tire Sizes
Complete fitment guide for the 2009 Cadillac STS: factory tire sizes, compatible wheel diameters, widths and offsets, and the 5x115 bolt pattern, for every trim.
Bolt Pattern
5x115 / 6x115
Varies by trim
Centre Bore
70.3 mm
Lug nuts
M12 x 1.5
Torque: 140 Nm
TPMS
315 MHz
Factory (OEM) Tire Sizes for the 2009 Cadillac STS
Front / square fitments
Rear (staggered fitments)
Click any size to shop tires in stock now, free shipping anywhere in Canada, optional installation at our 5 GTA locations.
2009 Cadillac STS Wheel Fitment by Trim
Compatible wheel diameter, width and offset ranges for each 2009 Cadillac STS configuration. Trims with different front and rear specs run a staggered setup.
3.6i · Saloon
Staggered3.6L · V6 · Petrol · Bolt pattern: 5x115
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 17–22" | 17–22" |
| Wheel width | 7.5–9" | 8–10" |
| Wheel offset | 34–45 mm | 32–51 mm |
| Tire width | 235–245 mm | 255–275 mm |
4.4i · Saloon
Staggered4.4L · V8 · Petrol · Bolt pattern: 6x115
| Spec | Front | Rear |
|---|---|---|
| Wheel diameter | 19–22" | 19–22" |
| Wheel width | 8–9" | 9.5–10" |
| Wheel offset | 34–45 mm | 32–56 mm |
| Tire width | 255 mm | 275–285 mm |
2009 Cadillac STS Fitment FAQ
What is the bolt pattern on a 2009 Cadillac STS?
The 2009 Cadillac STS uses 5x115 or 6x115 depending on trim, check the per-trim tables below to confirm which applies to your configuration. The centre bore is 70.3 mm.
What size tires fit a 2009 Cadillac STS?
Factory (OEM) tire sizes for the 2009 Cadillac STS include 235/50R17, 235/50ZR17, 235/50ZR18, 255/45R18, 255/45ZR18, 245/40ZR19, 255/40ZR19; staggered rear fitments use 255/45ZR17, 255/45ZR18, 275/35ZR19, 275/40ZR19, 285/35ZR20. Always confirm against the placard inside the driver's door jamb.
What wheel sizes can I put on a 2009 Cadillac STS?
Depending on trim, the 2009 Cadillac STS accepts wheels from 17" up to 22" in diameter with the correct width and offset, larger diameters typically require lower-profile tires to keep the overall rolling diameter stock.
What lug nut size does a 2009 Cadillac STS use?
The 2009 Cadillac STS uses M12 x 1.5 lug nuts, torqued to 140 Nm.
Fitment data is provided as a guide. Always verify sizes against your vehicle's door-jamb placard or with our fitment experts before ordering.