Choosing custom forged wheels for a pickup truck involves more than wheel diameter, width, and appearance. Before selecting a design or finish, two important fitment specifications need to be confirmed: wheel bolt pattern and center bore.

These measurements determine how a wheel mounts to the vehicle’s hub. Getting them wrong can prevent the wheel from fitting properly, even when the wheel diameter, width, and offset appear suitable.

For owners of Ford, Chevrolet, GMC, RAM, Toyota, and other full-size pickups, understanding these specifications is especially important when ordering aftermarket wheels.

This guide explains how truck wheel bolt patterns and center bore sizes work, why they matter, and what to check before ordering custom forged wheels.

What Is a Truck Wheel Bolt Pattern?

A wheel bolt pattern describes the number of mounting holes and the diameter of the circle formed by their centers.

It is commonly written using two numbers, such as:

• 5×127

• 6×135

• 6×139.7

• 8×165.1

• 8×170

• 8×180

The first number represents the number of wheel mounting holes.

The second number represents the bolt circle diameter, usually measured in millimeters.

For example, a 6×135 bolt pattern means the wheel has six mounting holes positioned on a circle measuring 135 millimeters in diameter.

The correct bolt pattern is essential because it determines whether the wheel mounting holes align with the vehicle’s wheel studs or hub mounting points.

Why Does Bolt Pattern Matter for Custom Forged Wheels?

Even if two wheels have identical diameters and widths, they may not fit the same vehicle.

A wheel designed for a six-lug truck cannot simply be installed on an eight-lug truck.

Similarly, wheels with the same number of mounting holes may still have different bolt circle diameters.

For example, 6×135 and 6×139.7 are different bolt patterns.

Both use six mounting holes, but their bolt circle dimensions are not interchangeable.

When ordering custom forged wheels, the correct bolt pattern must be confirmed before machining.

Unlike choosing a decorative finish, bolt pattern compatibility is a fundamental mounting requirement.

Common Bolt Patterns for U.S. Pickup Trucks

Many popular trucks use recognizable bolt patterns, but specifications can vary by model year, drivetrain, axle configuration, and vehicle generation.

The following table provides examples of common applications.

Important: These are examples, not universal fitment specifications. Earlier generations and certain configurations may use different bolt patterns. Always verify the exact model year and axle configuration before ordering.

A matching bolt pattern alone does not guarantee complete wheel compatibility.

Center bore, lug hardware, offset, brake clearance, and load requirements must also be considered.

What Is Wheel Center Bore?

The center bore is the circular opening in the middle of a wheel.

This opening fits around the hub’s center section when the wheel is installed.

Center bore is typically measured in millimeters.

For example, a wheel may have a center bore measurement of 87.1 mm, 106.1 mm, or another dimension depending on the vehicle and wheel design.

The important consideration is how the wheel’s center opening relates to the vehicle’s hub.

A center bore that is too small will generally prevent the wheel from seating correctly over the hub.

A center bore that is larger than the vehicle’s hub may require a suitable centering solution, depending on the wheel and mounting system.

That is why center bore should be confirmed before purchasing aftermarket truck wheels.

Hub-Centric vs Lug-Centric Wheels

When researching center bore specifications, truck owners will often encounter two terms: hub-centric and lug-centric.

These describe different approaches to locating the wheel during installation.

Hub-Centric Wheels

A hub-centric wheel uses a close-fitting center bore to help position the wheel concentrically around the vehicle’s hub.

This makes it easier to align the wheel correctly during installation.

Many factory wheel systems use a hub-centric mounting arrangement.

Lug-Centric Wheels

A lug-centric wheel relies on the designed lug nut or bolt seating surfaces to center the wheel during installation.

Correct hardware and installation procedures are especially important with this type of arrangement.

Lug-centric wheels are not inherently unsafe when properly engineered and installed for their intended application.

However, the wheel must be designed to work with the vehicle’s mounting system.

Which Is Better for Custom Forged Wheels?

Neither mounting arrangement should be chosen without considering the truck’s original hub design and the wheel manufacturer’s specifications.

For custom forged wheels, the center bore can often be specified to suit the intended vehicle.

This helps reduce uncertainty when configuring the wheel for a particular truck.

Can You Install Wheels With a Larger Center Bore?

In some applications, a wheel with a larger center bore can be used with appropriate hub-centric rings.

These rings fill the gap between the vehicle’s hub pilot and the wheel’s center bore to help center the wheel.

However, hub-centric rings do not solve every fitment problem.

They cannot correct:

• An incorrect bolt pattern

• Improper lug nut seating

• Inadequate wheel load capacity

• Brake caliper interference

• Incorrect wheel offset

• Incompatible mounting hardware

Not every truck or wheel application is suitable for centering rings. Always follow the wheel and vehicle manufacturers’ fitment requirements.

For a made-to-order wheel, specifying the correct center bore during production can eliminate the need to rely on a generic center bore dimension.

Are Bolt Pattern and Center Bore the Same as Offset?

No. These measurements describe different parts of wheel fitment.

Bolt pattern determines the mounting-hole arrangement.

Center bore determines the size of the opening around the hub.

Offset determines the position of the wheel relative to its mounting surface.

All three specifications contribute to overall fitment, but they cannot replace one another.

For example, a wheel may have:

• The correct bolt pattern

• The correct center bore

• An offset that creates suspension interference

In that situation, the wheel may mount to the hub but still be unsuitable for the truck.

This is why complete wheel fitment involves more than matching one or two numbers.

Why Custom Forged Wheels Offer More Fitment Flexibility

Off-the-shelf wheels are commonly produced in standardized sizes and mounting configurations.

These combinations work for many vehicles, but some truck owners need more specific specifications.

Custom forged wheels provide additional flexibility because dimensions can be configured before manufacturing.

At KYKY Wheels USA, custom wheel orders can be planned around the vehicle’s required:

• Wheel diameter

• Wheel width

• Offset

• Bolt pattern

• Center bore

• Finish

• Wheel design

For drivers who want to combine specific mounting requirements with a distinctive custom appearance, this flexibility can be particularly valuable.

Explore available designs and customization possibilities through our custom forged wheel options.

What About Lifted Trucks and Aftermarket Suspension?

A lift kit does not automatically change a truck’s factory bolt pattern or hub center bore.

However, certain aftermarket axle conversions, hub modifications, or other specialized components can change the required mounting specifications.

For trucks with extensive modifications, the original factory specifications may no longer describe the actual components installed on the vehicle.

Owners should confirm whether their truck retains the original:

• Wheel hubs

• Axles

• Wheel studs

• Brake system

• Suspension configuration

This is especially important for heavily modified trucks or custom builds.

Whenever major drivetrain or axle components have been changed, specifications should be checked against the installed hardware rather than relying only on the vehicle’s original model information.

Can the Same Forged Wheel Design Fit Different Trucks?

Yes. A forged wheel design can often be manufactured in different specifications for different vehicle applications.

For example, a customer may prefer the same spoke design for a Ford F-150 and a Chevrolet Silverado.

Although the overall wheel design can be similar, the mounting specifications may need to be different.

The manufacturer must account for the correct bolt pattern, center bore, dimensions, and other fitment requirements for each vehicle.

This is one of the advantages of choosing made-to-order forged wheels instead of selecting solely from predetermined inventory specifications.

However, not every design can be manufactured in every possible configuration. Engineering and application requirements still apply.

How KYKY Manufactures Custom Forged Truck Wheels

At KYKY Wheels USA, custom forged wheels are manufactured using 6061-T6 aluminum through our own production facility.

The production process includes CNC machining, polishing, finishing, and final inspection.

Because we operate our own manufacturing facility, we can maintain direct control over multiple stages of wheel production.

This supports:

• Factory-direct pricing

• Consistent production oversight

• Flexible customization

• More direct production coordination

Our custom-order customers also receive manufacturing updates and progress videos during production.

These updates provide visibility into how their wheels move through the manufacturing process before shipment.

Learn more about our manufacturing approach on the About KYKY Wheels USA page.

Common Bolt Pattern and Center Bore Mistakes to Avoid

Before ordering aftermarket wheels, watch for several common mistakes.

Assuming All Trucks From One Brand Use the Same Bolt Pattern

A manufacturer’s truck lineup may include different wheel mounting configurations across generations and vehicle classes.

Always verify the exact application.

Checking the Number of Lug Holes but Not Their Spacing

Two wheels may both have six lug holes while using completely different bolt circle diameters.

The full bolt pattern must match.

Ignoring the Center Bore

A matching bolt pattern does not guarantee that the center bore will fit over the hub correctly.

Using the Wrong Lug Hardware

Wheel mounting hardware must match the wheel’s seat design, thread specification, and intended installation requirements.

Assuming Every Wheel With a Matching Bolt Pattern Is Safe

Wheel load capacity, brake clearance, mounting surfaces, and other engineering factors still matter.

Ordering Before Confirming Vehicle Modifications

Custom axles and other aftermarket components may change the wheel specifications required.

What Information Should You Provide Before Ordering?

To help determine the correct specifications, prepare the following information:

1. Truck year

2. Truck make

3. Truck model

4. 2WD or 4WD

5. Single-rear-wheel or dual-rear-wheel configuration, if applicable

6. Existing wheel size

7. Tire size

8. Desired wheel diameter and width

9. Suspension or axle modifications

10. Preferred wheel design and finish

If you already know your bolt pattern and hub center bore, include those measurements.

If you are unsure, the vehicle information can be used as a starting point for fitment research and verification.

For a heavily modified truck, additional measurements or documentation may be necessary.

Final Thoughts: Get Your Wheel Mounting Specifications Right

Bolt pattern and center bore are two of the most important specifications when choosing custom forged truck wheels.

A matching bolt pattern allows the wheel mounting holes to align with the vehicle’s mounting points.

The correct center bore helps ensure compatibility with the hub’s center section and the intended mounting arrangement.

However, neither measurement guarantees complete fitment on its own.

Wheel width, offset, brake clearance, tire size, load requirements, and mounting hardware all need to be considered together.

Custom forged manufacturing gives truck owners greater flexibility to select suitable dimensions while also choosing the wheel design and finish they prefer.

At KYKY Wheels USA, we help customers review their truck information and custom wheel requirements before production.

Need help confirming your truck’s wheel specifications?

Visit our Contact Us page and share your vehicle details, current wheel setup, and preferred custom design.

Our team can help you review available forged wheel options for your build.