What is the bolt pattern on a 1930 Ford Model A?
The bolt pattern is five lugs on a 4.5-inch circle (5x114.3 mm).
For anyone restoring a 1930 Ford Model A or sourcing wheels and adapters, knowing this pattern is essential to ensure proper fitment across all four wheels. The Model A from this era standardized on a 5-lug, 4.5-inch bolt circle, a setup that remains a common reference point for vintage Ford wheels and many retro aftermarket options.
Understanding the bolt pattern and wheel compatibility
The bolt pattern describes how many lug holes a wheel has and the diameter of the circle that passes through their centers. On the 1930 Model A, there are five lug holes arranged on a 4.5-inch diameter circle. That pattern, often written as 5x4.5 inches (or 5x114.3 mm in metric), is widely cited in restoration guides and aftermarket catalogs as the standard for this vehicle. This consistency helps when sourcing period-correct wheels or modern recreations designed to fit classic Fords.
Practical considerations for restorations and upgrades
When shopping for wheels, brake upgrades, or adapters, verify the 5x4.5 pattern before purchasing. Many vintage and reproduction wheels are produced specifically to fit 5x4.5 inches, which aligns with the Model A’s original specification. If you plan to upgrade to modern wheels or undertake substantial braking or hub changes, you may encounter variations in center bore size or stud sizing; always confirm these dimensions in addition to the bolt pattern to ensure a safe, proper fit.
How to confirm the bolt pattern on your Model A
To verify the bolt pattern on your specific vehicle, measure the diameter across opposite lug centers to confirm a 4.5-inch circle, and count the lug holes to ensure there are five. When in doubt, consult a reputable restoration manual, check with a vintage Ford parts supplier, or have a qualified technician measure the pattern on the hub and wheel mounting surfaces. Consistency across all four wheels is expected for a stock 1930 Model A.
Summary
For a 1930 Ford Model A, the wheel bolt pattern is a five-lug arrangement on a 4.5-inch bolt circle (5x114.3 mm). This standard is important for wheel compatibility in both restoration projects and modern retromodifications. Always verify pattern, center bore, and lug size when sourcing wheels or adapters to ensure a safe, proper fit.
