When it comes to upgrading or replacing the wheels on your Subaru, understanding the Subaru bolt pattern is essential. Choosing the correct bolt pattern ensures that the wheels fit properly, leading to safe driving and optimal performance. If the bolt pattern does not match, you may face fitment issues, which can result in handling problems and safety risks. In this guide, we will cover everything you need to know about the Subaru bolt pattern, including measurements, compatibility, and tips for selecting the right wheels.
What is a Bolt Pattern?
A bolt pattern, also known as a lug pattern or PCD (Pitch Circle Diameter), refers to the arrangement of the bolt holes on a wheel. It is expressed as two numbers: the number of bolt holes and the diameter of the imaginary circle they form. For example, a 5×100 Subaru bolt pattern means the wheel has five lug holes arranged in a 100mm-diameter circle.
Common Subaru Bolt Patterns by Model
Subaru vehicles use a few common bolt patterns, depending on the model and year. Here are the most frequently used bolt patterns:
- 5x100mm – Found on models such as the Subaru Impreza, Subaru Legacy (older models), and Subaru Forester (older models).
- 5×114.3mm – Used on models like the Subaru WRX, Subaru STI, Subaru Outback (newer models), and Subaru Ascent.
It is crucial to verify your vehicle’s bolt pattern before purchasing new wheels to ensure a proper fit.
How to Measure a Subaru Bolt Pattern
If you are unsure about your Subaru’s bolt pattern, you can measure it yourself with these steps:
- Count the Number of Lug Holes – Most Subaru models have either 4 or 5 lug holes.
- Measure the Circle Diameter – If the car has an even number of lugs (e.g., 4 or 6), measure from the center of one lug hole to the center of the hole directly across from it. If the car has an odd number of lugs (e.g., 5), measure from the center of one lug hole to the outer edge of the opposite hole.
- Record the Measurement – If the measurement is 100mm and the vehicle has 5 lugs, the bolt pattern is 5x100mm.
Why the Subaru Bolt Pattern is Important
Using the correct Subaru bolt pattern ensures:
- Proper Fitment – The wheels sit securely on the hub, preventing vibration or misalignment.
- Safety – Incorrect bolt patterns can lead to loose wheels, posing a hazard.
- Improved Handling – Well-fitted wheels enhance performance, cornering, and stability.
- Aesthetic Appeal – The right wheels improve your Subaru’s look without requiring spacers or modifications.
Can You Change the Subaru Bolt Pattern?
If you want to install wheels with a different bolt pattern, here are some options:
- Wheel Adapters – These allow you to fit wheels with a different bolt pattern but may affect handling due to added thickness.
- Custom Drilled Wheels – Some manufacturers offer custom drilling to match your Subaru’s specific bolt pattern.
- Hub Swap – This is a more complex option that involves replacing the entire hub assembly but can be expensive and labor-intensive.
While changing the bolt pattern is possible, it is best to use wheels with the correct Subaru bolt pattern to avoid complications.
Offset vs. Bolt Pattern: What’s the Difference?
Many people confuse offset with bolt pattern, but they are different:
- Bolt Pattern – The number of lug holes and the diameter of the circle they form.
- Offset – The distance between the wheel’s mounting surface and the centerline of the wheel.
Both are important when selecting wheels. An incorrect offset can cause wheels to sit too far inward or outward, affecting handling and clearance.
Tips for Choosing Wheels for Your Subaru
When selecting wheels for your Subaru, keep these factors in mind:
- Verify the Bolt Pattern – Ensure the wheels match your Subaru’s specific bolt pattern.
- Check the Offset and Center Bore – Subaru vehicles have different offset ranges and center bore sizes. Ensure compatibility before purchasing wheels.
- Choose High-Quality Wheels – Avoid cheap or low-quality wheels that may crack under stress.
- Test Fit the Wheels – If possible, test fit the wheels before making a final purchase.
- Consult a Professional – If you are unsure, seek advice from a Subaru specialist or wheel expert.
Aftermarket Wheel Options for Subaru Vehicles
Upgrading your Subaru wheels can improve performance and aesthetics. Popular aftermarket options include:
- Lightweight Alloy Wheels – Improve acceleration and fuel efficiency.
- Larger Diameter Wheels – Enhance handling and give a sportier appearance.
- Performance Wheels – Provide better traction and durability.
Always ensure that aftermarket wheels match the correct Subaru bolt pattern for proper fitment.
Conclusion
Understanding the Subaru bolt pattern is crucial when upgrading or replacing your wheels. Most Subaru models use either a 5x100mm or 5×114.3mm bolt pattern, depending on the model and year. Always verify the bolt pattern, offset, and other specifications before purchasing new wheels. Selecting the correct Subaru bolt pattern ensures safety, performance, and aesthetics. Whether you are upgrading for style or function, using the right wheels will keep your Subaru running smoothly and looking great.
