How wide is a 55 Chevrolet rear end?
Most 1955 Chevrolets share a familiar rear axle arrangement with a housing width around 56 inches and a wheel track close to 58–60 inches. Exact numbers vary by model and axle option, so check your car's data plate or measure for precision.
In this article we’ll explain what “width” means in the context of a 1955 Chevy, provide typical figures, and offer practical steps to verify the exact measurement on your car. This information is useful for wheel swaps, restoration, and rear-end work.
What rear-end width means for a 1955 Chevy
When enthusiasts talk about rear-end width, they are usually referring to two related measurements: the axle housing width (drum-to-drum) and the track width (center-to-center of the wheel hubs). These numbers determine fitment for wheels, tires, and any swapped axles.
Below are typical figures you’ll encounter in factory data and common restorations. Remember, exact values can vary with trim level and any aftermarket modifications.
Here are typical dimensions you might encounter when restoring or swapping in a rear axle:
- Rear axle housing width (drum-to-drum, approximate): 56 inches (142 cm).
- Track width (center-to-center, approximate): 58–60 inches (147–152 cm).
- Note: Bel Air/210/150 models usually share the same stock width; alternatives like heavy-duty or aftermarket axles can alter width by a fraction of an inch to an inch or two.
For exact numbers, consult the factory service manual for your specific chassis code or measure directly on your car.
How to measure the rear end width on a 1955 Chevy
Measuring the housing width
With the rear wheels removed, measure the distance between the outside faces of the axle housings where the brakes mount, or between the inner surfaces of the brake backing plates. This is the drum-to-drum width. Record in inches and centimeters.
Measuring the track width
Measure the distance from the centerline of one wheel’s lug pattern to the centerline of the opposite wheel. If you’re unsure of wheel mounting surfaces, measure to the centerlines of the wheel studs or the wheel hub faces. This is the track width.
Summary
In stock form, a 1955 Chevrolet rear end typically presents about 56 inches of axle housing width and a wheel track near 58–60 inches. These figures are general guidelines; exact values depend on model year specifics, trim, and any aftermarket swaps. For restoration or performance projects, verify the measurement on your own car or consult a factory manual to be precise.
