2002 pontiac grand prix se tire size
2002 Pontiac Grand Prix SE Tire Size: The Complete Analyst’s Guide to Fitment, Specs & Upgrades
The 2002 Pontiac Grand Prix SE remains one of the most widely serviced midsize coupes on the road today, with over a million examples still registered across North America. Getting the tire specification right — down to the single millimeter — is the difference between smooth highway cruising and premature suspension wear, inaccurate speedometer readings, and compromised handling. This guide delivers the definitive tire data for the 2002 Grand Prix SE and every other trim level, backed by factory specifications, comparative analysis, and real-world upgrade guidance.
Key Takeaways
- Standard tire size:
P205/70R15on 15×7J steel wheels — this is the factory-equipment specification for the SE trim. - Lug pattern: 4–100 mm bolt pattern with M12×1.5 thread pitch; wheel nut style is tapered (conical seat).
- Tire pressure: Factory-recommended cold pressure is 30 PSI front and rear (located on the driver-side door jamb placard).
- Diameter consistency: Upgrading to P215/60R16 (GT-spec) increases overall diameter by only 1.4%, keeping speedometer error under 1%. Upgrading to P225/55R17 (GS/Supercharged) raises diameter by 3.2% — acceptable but worth calibrating.
- Load range: All-season touring tires with a load index of 91 (615 kg) or higher are recommended for the SE’s curb weight of approximately 1,488 kg (3,280 lbs).
Factory Tire Specification for the 2002 Pontiac Grand Prix SE
The 2002 Pontiac Grand Prix SE — the entry-level trim in GM’s Grand Prix lineup — rolls on P205/70R15 all-season touring tires mounted on 15-inch steel wheels wrapped in plastic hubcaps. This tire size was carried over from the 2000 model-year redesign and remained unchanged through the end of production in 2004.
Decoding the P205/70R15 Designation
| Element | Value | Meaning |
|---|---|---|
| P | Metric Passenger | Vehicle class — light-duty passenger car (LT = Light Truck; ST = Special Trailer) |
| 205 | 205 mm | Section width — the nominal width of the tire from sidewall to sidewall when mounted and inflated |
| 70 | 70% | Aspect ratio — sidewall height is 70% of the section width, equaling 143.5 mm |
| R | Radial | Construction type — internal ply cords run radially across the tire cross-section |
| 15 | 15 inches | Rim diameter — the wheel bead seat diameter that the tire is engineered to mount on |
Complete Wheel & Tire Data Sheet
| Parameter | Specification |
|---|---|
| Tire Size | P205/70R15 |
| Wheel Size | 15 × 7J |
| Bolt Pattern | 4 |