How wide is a model A rear axle?
In short, for the widely produced Ford Model A from 1927 to 1931, the rear axle width (the distance between the centers of the two rear wheels) is about 54 inches, or roughly 137 centimeters. Exact figures can vary slightly by year, brake configuration, and wheel/tire choices.
To understand what that means and how the measurement is defined, it helps to know that “rear axle width” typically refers to the wheel track—the hub-to-hub distance across the rear tires. The 54-inch figure is widely cited for the 1927–1931 Model A, but different variants bearing the same name can have different specifications. This article outlines the standard figure, how it’s measured, and where to find precise data for a specific car.
Defining the measurement
When manufacturers talk about rear axle width, they usually mean the wheel track—the center-to-center distance between the two rear wheel hubs. This measurement determines fitment for wheels and fenders and is affected by the axle housing design, brake drums, and mounting surfaces. On vintage cars like the Model A, slight variations may occur between production years or due to aftermarket components.
Typical width for the Ford Model A (1927–1931)
For the Ford Model A produced between 1927 and 1931, the rear axle width is commonly cited as about 54 inches (approximately 137 centimeters). In some references you may encounter figures ranging from roughly 53.5 to 54.5 inches (about 135.9 to 138.4 centimeters), reflecting small year-to-year or component-based variations.
Variant notes: other Model A references
Earlier Model A (1903–1904)
The original Ford Model A from 1903–1904 used a different chassis and axle arrangement. Its rear width was not the same as the later 1927–1931 Model A, and precise figures require consulting period factory drawings or service manuals. Do not assume the 54-inch figure applies to the 1903–04 version without verification.
Other brands or uses of the “Model A” label
Some vehicles or aftermarket interpretations branded as “Model A” may have their own axle widths. Always verify the exact year, variant, and specification from primary sources or trusted reference materials when precision matters.
How to verify for a specific car
To determine the exact rear axle width for your Model A, consider these approaches: consult the official Ford Model A workshop manual or chassis diagrams, measure the vehicle directly with tires removed (measure hub centers along a flat plane), or consult reputable Model A clubs and museums that publish year-specific measurements. Precise data can depend on brake type (drum vs. disc), wheel width, and any modifications.
Summary
For the classic Ford Model A (1927–1931), the rear axle width is typically about 54 inches (roughly 137 cm) from wheel center to wheel center. Expect small year-to-year variations due to brakes, wheels, and other components. If you’re dealing with a different Model A generation or another manufacturer’s “Model A,” verify the exact figure from period manuals or trusted reference sources.
