What size tires are on a 1975 Vega?
The 1975 Chevrolet Vega most commonly used 13-inch wheels with tire sizes in the 155/80-13 or 165/80-13 range, depending on trim and equipment. If your Vega has different wheels, sizes may vary.
To understand the exact tire size for a specific car, it helps to know the original equipment configuration and where to check for confirmation. The following article outlines the typical OE sizes, how to verify your car’s exact size, and tips for restoration or replacement today.
Original equipment tire sizes (1975 Vega)
The Vega was equipped with 13-inch wheels as standard, and tire sizing varied modestly by trim and production date. The sizes most frequently listed for 1975 models are:
- 165/80-13 on 13x4.5-inch wheels
- 155/80-13 on 13x4.5-inch wheels
Note: Some early 1975 production units used bias-ply tires and the exact designation might appear as 165-80-13 or 155-80-13 in older catalogs. The key point is the configuration centers on 13-inch wheels with a narrow tire footprint typical of the Vega’s compact design.
How to confirm your car’s exact size
Because production and option packages varied, the only sure way to know your Vega's tire size is to check the print on the door placard and the tire sidewall. Here are the steps:
- Check the driver's door jamb placard for the recommended tire size and inflation pressure.
- Inspect the current tires for the size printed on the sidewall (example: 165/80-13 or 155/80-13).
- Match the wheel diameter (13 inches) to identify compatible tire widths (typically 155–165 mm in width for these wheels).
- Consult the owner's manual or a GM parts catalog for the specific model year and trim level listed.
If you are restoring the vehicle or purchasing tires for replacement, you can consider using the OE sizes listed above or speak with a tire professional to select a modern equivalent that fits the wheel and avoids clearance issues.
Notes for restorations and modern replacements
When updating or restoring to modern tires, consider the following:
- Verify clearance: wheel well clearance and suspension geometry are critical for avoiding rubbing at full steering lock or compression.
- Speedometer accuracy: changing tire diameter can affect the speedometer reading; adjust with a speedometer gear or account for the difference.
- Tire load index and speed rating: choose tires with adequate load index for the Vega's weight and the desired driving conditions.
In practice, many owners retain the original 13-inch wheel setup and select 165/80-13 or 155/80-13 tires from modern manufacturers that maintain the correct circumference and fit the wheel. Always confirm with a tire professional for your specific car.
Summary
The 1975 Chevy Vega typically used 13-inch wheels with OE tire sizes of 165/80-13 or 155/80-13. Check your door placard or tire sidewalls to confirm the exact size for your car, and consult a tire professional if you plan a replacement or upgrade.
Additional context on the Vega model and tires
For readers restoring a 1975 Vega or purchasing a driver-quality example, cross-check parts catalogs and period brochures. Tire technology has evolved since the 1970s, but the basic 13-inch wheel and narrow tire footprint remain a common configuration for stock replacements on these vehicles.
