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Wheel Bolt Pattern Explained – What Is PCD & How to Measure It?

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Learn what a wheel bolt pattern (PCD) is, how to measure it correctly, and why matching the correct bolt pattern is essential when buying aftermarket alloy wheels.

Introduction

One of the first specifications you should verify before buying aftermarket wheels is the bolt pattern, also known as PCD (Pitch Circle Diameter).

Even if a wheel has the correct diameter, width, and offset, it will not fit if the bolt pattern is incorrect.

Understanding PCD helps you:

· Choose compatible wheels

· Avoid installation problems

· Ensure safe wheel fitment

· Select the correct wheels for future upgrades

This guide explains what a bolt pattern is, how to measure it, and why it matters when choosing alloy wheels.

What Is a Wheel Bolt Pattern?

A wheel bolt pattern describes two specifications:

1. The number of wheel mounting holes

2. The diameter of the circle formed by those holes

For example:

5×112

means:

· 5 = Five mounting holes

· 112 = The bolt holes are positioned on a circle with a diameter of 112 mm

This measurement is also called PCD (Pitch Circle Diameter).

Common Wheel Bolt Patterns

Some of the most common bolt patterns include:

Always confirm the exact specification for your vehicle, as bolt patterns may vary by model year or trim level.

Why Is the Bolt Pattern Important?

The bolt pattern determines whether the wheel can be mounted correctly to the hub.

Using the wrong PCD can result in:

· Improper wheel seating

· Installation difficulties

· Fastener stress

· Unsafe operation

A wheel should always match the vehicle’s specified bolt pattern unless an approved conversion solution is used.

How to Read a Bolt Pattern

Let’s use another example:

5×120

This means:

· Five mounting holes

· 120 mm pitch circle diameter

Another example:

6×139.7

This means:

· Six mounting holes

· 139.7 mm pitch circle diameter

The second number may be shown in millimeters or, in some markets, as an equivalent inch-based dimension.

How to Measure a Wheel Bolt Pattern

Even Number of Lug Holes

For wheels with an even number of holes (4, 6, or 8):

Measure from the center of one hole to the center of the hole directly opposite.

This measurement is the PCD.

Odd Number of Lug Holes

For wheels with five mounting holes, measurement is different.

Measure from the center of one hole to the outer edge of the hole directly opposite.

Because five-hole patterns do not have a hole directly across from each other, using the correct measuring method is important.

For the highest accuracy, use a dedicated bolt pattern gauge or manufacturer specifications.

Does Bolt Pattern Affect Offset?

No.

These are separate specifications.

· Bolt pattern (PCD) determines whether the wheel can be mounted.

· Offset (ET) determines where the wheel sits relative to the suspension and fender.

Both must be correct for proper fitment.

Bolt Pattern vs Center Bore

These terms are often confused.

Bolt Pattern

Determines mounting compatibility.

Center Bore

Determines how the wheel centers on the hub.

Both specifications should match the vehicle or be accommodated using the appropriate engineering solution where applicable.

Can You Change a Bolt Pattern?

Some enthusiasts use:

· Bolt pattern adapters

· Hub conversion kits

These products can allow wheels with one bolt pattern to be fitted to another.

However, they also change wheel position and should be selected carefully with consideration for fitment, load requirements, and local regulations.

Whenever possible, selecting wheels with the correct factory bolt pattern is the preferred solution.

Bolt Patterns on Popular EVs

Examples include:

*Always confirm the exact specifications for your vehicle before purchasing wheels.

Other Specifications You Must Check

A matching bolt pattern alone is not enough.

Also verify:

· Wheel diameter

· Wheel width

· Offset (ET)

· Center bore

· Load rating

· Brake caliper clearance

Proper fitment requires all specifications to work together.

Common Bolt Pattern Mistakes

Avoid these common errors:

· Assuming all wheels with five bolts are interchangeable

· Ignoring differences between 5×112 and 5×114.3

· Forgetting to verify the center bore

· Choosing wheels based only on appearance

· Assuming all model years use the same bolt pattern

Checking specifications before ordering can prevent costly returns.

TISLI Vehicle Fitment Support

TISLI develops lightweight flow formed alloy wheels for passenger cars, SUVs, and electric vehicles.

Our engineering support includes:

· Vehicle-specific bolt pattern matching

· Multiple offset options

· High load rating designs

· Big brake compatibility

· EV-specific fitment solutions

· OEM and private label manufacturing

Our goal is to help customers select wheels that combine accurate fitment with modern performance and styling.

FAQ

What does 5×112 mean?

It means the wheel has five mounting holes arranged on a 112 mm pitch circle diameter.

Is PCD the same as a bolt pattern?

Yes. PCD (Pitch Circle Diameter) is another name for the wheel bolt pattern.

Can I install 5×114.3 wheels on a 5×112 vehicle?

Not directly. The bolt pattern must match unless an appropriate conversion solution is used.

Does bolt pattern affect wheel offset?

No. Bolt pattern and offset are different specifications, and both must be considered during wheel selection.

Where can I find my vehicle’s bolt pattern?

You can usually find it in the owner’s manual, manufacturer specifications, or by consulting a reliable wheel fitment database.

Final Thoughts

The wheel bolt pattern is one of the most important specifications when selecting aftermarket wheels.

Understanding how PCD works—and verifying it alongside wheel diameter, offset, center bore, and load rating—helps ensure safe installation and proper fitment.

Taking a few minutes to confirm these measurements before ordering can save time, reduce installation problems, and help you choose wheels that perform as well as they look.