Cadillac STS I Wheel Lug Pattern, Offset & Center Bore Specifications
The Cadillac STS I utilizes specific wheel lug patterns combined with precise offset and center bore measurements to ensure proper wheel installation. Knowing the exact lug count × PCD (pitch circle diameter) is essential when selecting aftermarket or replacement wheels for the STS I models.\n\nOffset values (ET) for the Cadillac STS I vary depending on the model year and wheel size, affecting the positioning of the wheel relative to the suspension and fenders. The center bore dimension is equally important as it centers the wheel on the hub, maintaining stability and reducing vibrations.\n\nOur detailed year-sorted reference table for the Cadillac STS I provides accurate lug patterns, offset ET, center bore, and rim size information. This data supports enthusiasts and professionals alike in making informed decisions on wheel fitment, preserving safety and vehicle performance.
| Make / model / trim | Year | Tire | Rim width (in) | Rim diam. (in) | Bolt pattern | Offset ET | Bore DIA | Mounting |
|---|---|---|---|---|---|---|---|---|
| Cadillac STS I 3.6 | 2007 | 235/50R17 | 7.5 | 17 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor | 2007 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor AWD | 2007 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.6 | 2007 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 3.6 | 2006 | 235/50R17 | 7.5 | 17 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor | 2006 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor AWD | 2006 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.6 | 2006 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 3.6 | 2005 | 235/50R17 | 7.5 | 17 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor | 2005 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.4 Kompressor AWD | 2005 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.6 | 2005 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.6 AWD | 2005 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
| Cadillac STS I 4.6 AWD | 2004 | 235/45R18 | 7.5 | 18 | 5×115 | 45 | 71.5 | M14*1,5 |
FAQ
- What is the lug pattern specification for the Cadillac STS I?
- The Cadillac STS I typically uses a lug pattern defined by the number of lug nuts and the pitch circle diameter (PCD) in millimeters, which varies slightly by model year.
- Why is the offset ET important for Cadillac STS I wheels?
- Offset ET determines the distance between the wheel mounting surface and the wheel centerline, affecting wheel fitment, suspension clearance, and handling.
- How does the center bore affect wheel installation on the Cadillac STS I?
- The center bore ensures the wheel centers properly on the hub, preventing vibrations and ensuring a secure, balanced fit.
Tire size calculatorShow
Compare two tire sizes — diameter, speedometer error, and clearance change.
| Size 1 | Size 2 | Diff | Diff(%) | |
|---|---|---|---|---|
| Diameter | 25.0" | 25.4" | 0.5" | 1.89% |
| Width | 7.7" | 8.5" | 0.8" | 10.26% |
| Circumference | 78.4" | 79.9" | 1.5" | 1.86% |
| Profile height | 5.0" | 4.2" | -0.7" | -15.08% |
| Turnover per mile | 807 | 793 | 14 | -1.73% |
| Clearance | - | - | +0.2" | - |
Speedometer Error
(First wheel OEM size)
| Reading | 20 mph | 30 mph | 40 mph | 50 mph | 60 mph | 70 mph | 80 mph | 90 mph |
|---|---|---|---|---|---|---|---|---|
| Actual | 20.4 | 30.5 | 40.7 | 50.9 | 61.1 | 71.2 | 81.4 | 91.6 |