Here's what you need to know and how to find compatible wheels:
* Bolt Pattern: The 1966 El Camino typically used a 5 x 4.75 inch bolt pattern (five lug nuts on a circle with a 4.75-inch diameter). This is crucial. Wheels with a different bolt pattern will *not* fit.
* Wheel Diameter: This refers to the overall diameter of the wheel itself. While the 1966 El Camino could accommodate a range of diameters, you'll need to check your car's specifications and clearances to avoid rubbing on the fenders, suspension, or brakes. Using a larger diameter requires tires with smaller sidewalls to maintain the original overall diameter.
* Backspacing: This is the distance from the mounting surface of the wheel to the inner edge of the wheel. Incorrect backspacing can cause the wheel to rub against the suspension, brake calipers, or fenders. Finding factory wheels with the same backspacing is essential. Incorrect backspacing could be more problematic than a slightly different diameter.
* Wheel Width: The width of the wheel also needs to be considered and impacts the backspacing. A wider wheel with the same backspacing will push the tire outward, and vice-versa.
How to Find Compatible Wheels:
1. Consult a 1966 El Camino parts catalog or restoration guide: These resources often list factory wheel options and their specifications.
2. Online resources: Websites specializing in classic car parts often have detailed specifications for wheels, allowing you to filter by year, make, model, and bolt pattern.
3. Check other GM vehicles from the same era: Other 1960s Chevrolet, Pontiac, Oldsmobile, Buick, and possibly even GMC trucks might have used the same 5 x 4.75" bolt pattern. However, always verify backspacing and diameter before purchase.
Caution: While some wheels might *seem* to fit based on the bolt pattern, differences in backspacing and diameter can lead to serious issues, including:
* Rubbing: The tire could rub against the fenders, suspension components, or brake calipers.
* Handling problems: Incorrect backspacing can negatively affect steering, braking, and overall handling.
* Safety hazards: Extreme cases could lead to wheel failure.
Therefore, always double-check the specifications before mounting any used wheels on your El Camino. If you're unsure, consult with a professional mechanic or classic car restoration specialist.
