How wide is a Vega rear end?
The rear track width of a Chevrolet Vega is typically about 50 inches (roughly 127 cm) from wheel center to wheel center, though the exact figure can vary by year, model and measurement method. This article explains what that width means, what values you might expect, and how to verify the measurement for a specific vehicle.
In automotive terms, “rear end width” usually refers to the rear track width, not the bumper width or overall car width. For Vega restorers and contributors to parts compatibility, knowing the precise measurement matters for wheel offset, brake clearance, and fender fitment. Variations can occur between hatchback, notchback, or special editions and across production years.
What the measurement means
Rear end width is the distance between the centers of the two rear wheels. It is also called the rear track width. This dimension matters when selecting wheels, tires, or braking components, and it influences alignment tolerances and body clearance. It is distinct from the overall width of the car or the distance between the outside edges of the tires.
Typical values for the Vega
Below are commonly cited ranges for the Vega’s rear track width. Because General Motors did not publish a single universal figure for every year and body style, values can vary slightly depending on how the measurement is taken and which model you have.
- Rear track width (hub-to-hub): about 49.9 to 50.5 inches (127 to 128.3 cm) for many 1971–1974 Vega variants.
- Some later or alternative configurations list around 50.5 inches (128.3 cm) hub-to-hub, depending on trim and minor production changes.
For restoration or a precise fit, verify the exact figure for your specific vehicle year and body style against the factory service manual or GM parts catalogs.
How to measure your Vega’s rear end
To obtain an accurate rear track width for a particular Vega, follow these steps. Measurements should be taken with the car on a level surface and the suspension unloaded to avoid sag from weight or springs.
- Secure the vehicle on a flat surface and chock the front wheels. Raise the rear of the car and support on sturdy stands if you need to remove tires.
- Mark the centerline of each rear wheel hub or axle mounting point. If you’re measuring from the studs, measure to the center of the stud hole; if using the hub, measure to the center of the hub.
- With a tape measure, measure straight across from the center of the left rear wheel to the center of the right rear wheel. Record the distance in inches and convert to centimeters if needed.
- Repeat the measurement on a separate axis if possible (e.g., straight across on the brake drum/hub face) to verify consistency.
- Compare your result to published ranges and note any discrepancies that might be due to aftermarket wheels, suspension modifications, or tire sizes.
When in doubt, consult the vehicle’s factory service manual for the precise specification of your year and body style, as some minor revisions can affect the measurement.
Notes for restoration or modification
If you plan to swap wheels, install brakes, or restore a Vega to stock specifications, the rear track width is a critical parameter. A mismatch between track width and wheel offset can lead to clearance issues, altered steering geometry, or tire rubbing. Always cross-check the rear track with the front track to ensure balanced handling and proper alignment.
Summary
In short, the Vega’s rear end width is typically around 50 inches (about 127 cm) hub-to-hub, with a small range of variation depending on year and model. For a precise figure on a specific car, refer to the factory service manual or measure the vehicle directly following careful, level-ground procedures. Accurate measurement supports correct wheel/tender choice, brake clearance, and proper fitment in restoration projects.
Are all 10 bolt GM rear ends 8.5 inches?
There is but one high-performance GM 10-bolt rear end, the 8.5 (and identical 8.6). The other versions are severely limited in capabilities. Built from 1964 through 1972, the 8.2 models are capable of handling about 400 hp with street tires in stock trim, about 350 on drag radials, and 300 on slicks.
How wide is the rear axle on a 2006 Chevy Trailblazer?
2002-2006 Chevrolet Trailblazer EXT. Notes: Differential Bearing Cup -Rear Axle -- with 3.0630 in. Width; 0.6562 in. Cup Length; with 8.00 Ring Gear.
Why was the Vega so prone to rust?
An undiscovered defect in the new rust-proofing system left the underside of the front fenders unprotected.
How wide is a Chevy Vega?
The width of a Chevy Vega is 65.4 inches (1,661 mm). This dimension is consistent across all Vega models, including the standard, Cosworth, and models from different production years.
- Overall width: 65.465.465.4 inches (1,6611 comma 6611,661 mm)
- Consistency: This width applies to all model years and variations of the Vega.
