Cadillac STS Tire Size
Find the correct tire size for your Cadillac STS. Covers all model years and trim levels with pressure specs and recommended brands.
Last updated: 2026-05-07 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
The Cadillac STS tire size varies by trim level and model year. Check the door jamb sticker or owner's manual for the exact OEM size — see the year-by-year breakdown below.
| Generation | Years | Top spec |
|---|---|---|
| 2006-2011 | 2006-2011 | Varies by trim level — check door jamb sticker or owner's manual for exact OEM size |
| 2005-2005 | 2005-2005 | Varies by trim level — check door jamb sticker or owner's manual for exact OEM size |
Know the exact tire size job for your Cadillac STS
The Cadillac STS tire size varies by trim level and model year. Check the door jamb sticker or owner's manual for the exact OEM size — see the year-by-year breakdown below.
Wheel and tire sizes change by trim, package, and wheel diameter. Use the door-jamb placard as the final authority. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
Use the archive navigator when you need the exact engine, trim, or production-branch manual instead of a broad year-range summary. That keeps the buying list and repair steps aligned with the real vehicle.
2006-2011
Representative 2006 manual branch for 2006-2011
External Pages
STS Base, 3.6 7, AWD
External Pages — 2006 Cadillac STS Base, 3.6 7, AWD Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Cadillac >> 2006 >> STS Base, 3.6 7, AWD >> Repair...
Open factory section →External Pages
STS Base, 3.6 7, RWD
External Pages — 2006 Cadillac STS Base, 3.6 7, RWD Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair...
Open factory section →2005-2005
Representative 2005 manual branch for 2005-2005
External Pages
STS 3.6 7
External Pages — 2005 Cadillac STS 3.6 7 Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Cadillac >> 2005 >> STS 3.6 7 >> Repair and Diagnosis >> Exte...
Open factory section →External Pages
STS 4.6 A, AWD
External Pages — 2005 Cadillac STS 4.6 A, AWD Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >> Cadillac >> 2005 >> STS 4.6 A, AWD >> Repair and Diagnos...
Open factory section →2006-2011
2006-2011- →Always match all four tires for size, speed rating, and load index
- →Tire pressure specs are on the driver door jamb sticker, NOT the tire sidewall
- →Winter tires should be the same size or one size narrower than stock
- →TPMS sensors must be reprogrammed when swapping wheel sets
2005-2005
2005-2005- →Always match all four tires for size, speed rating, and load index
- →Tire pressure specs are on the driver door jamb sticker, NOT the tire sidewall
- →Winter tires should be the same size or one size narrower than stock
- →Check if your model has TPMS — sensors need relearning after tire rotation
One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Tire Pressure Gauge
Digital or analog gauge for precise pressure checks.
Portable Air Compressor
Inflate your tires anywhere, anytime.
Tire Tread Depth Tool
Check if your tires are safe and ready for the road.
Valve Stem Caps
Keep dirt and moisture out of your tire valves.
Tire Repair Kit
Useful emergency backup for puncture-prone drivers.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Cadillac STS so the job is ready when the parts arrive.
Frequently Asked Questions
- What size tires does a Cadillac STS use?
- The Cadillac STS tire size varies by trim level and model year. Base trims typically use smaller wheels (16") while higher trims use 17" or 18" wheels. Check the breakdown below for your specific year and trim.
- What is the correct tire pressure for a Cadillac STS?
- Recommended tire pressure for the Cadillac STS is typically 32-36 PSI. The exact specification is on the sticker inside the driver's door jamb. Do NOT use the "max pressure" number on the tire sidewall.
- Can I put bigger tires on my Cadillac STS?
- You can typically go one size up in width (e.g., 215 to 225) without issues. Going up in diameter (e.g., 16" to 17") requires matching wheels and may affect speedometer accuracy. Extreme upsizing can cause rubbing and void warranty.
- How often should I rotate Cadillac STS tires?
- Rotate your Cadillac STS tires every 5,000-7,500 miles for even wear. Front-wheel drive vehicles wear front tires faster, so regular rotation is especially important.
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Author & Review
Written by AllOEMManuals Editorial Team. Reviewed by ASE-certified technicians and updated with factory-reference checks for fitment-sensitive steps.
This guide was drafted with AI assistance and reviewed for accuracy by a human editor.
Last updated: 2026-05-07