What is the bolt pattern on a 1940 Ford?
The bolt pattern is five lug holes on a 4.5-inch bolt circle (5x114.3 mm).
In 1940, Ford passenger cars used a standard five-lug wheel arrangement with a 4.5-inch bolt circle. This pattern—often written as 5x4.5 or 5 on 114.3 mm—was characteristic of most Ford passenger models of the era and remains a key reference point for restorers and wheel suppliers. Always confirm the exact pattern on your specific vehicle, especially if you are dealing with a non-standard body style or a special edition.
Pattern and compatibility
Understanding the pattern is essential when selecting wheels, adapters, or upgrades. The 5x4.5 inch arrangement means five lug holes spaced evenly around a circle 4.5 inches in diameter. The metric equivalent is 5x114.3 mm. This pattern is a defining feature of Ford passenger cars from that era and continues to influence restoration and compatibility decisions.
Practical considerations for restorers and owners
When shopping for wheels for a 1940 Ford, verify that the wheel center bore and lug nut size match your vehicle. Many aftermarket wheels are made to fit a 4.5-inch bolt circle and will require attention to offset and backspacing to ensure proper clearance and alignment. If in doubt, consult a restoration specialist or reference a reputable parts catalog tailored to your exact model and body style.
Summary
The 1940 Ford uses a five-lug pattern on a 4.5-inch bolt circle (5x114.3 mm). This standard persisted across the era’s passenger cars and remains a fundamental consideration for restoration and wheel compatibility today.
