Wheel offset, PCD, and center bore are essential fitment specifications for custom forged wheels. A wheel can have the correct design and diameter but still be unsuitable if its bolt pattern, hub bore, offset, brake clearance, or width are not matched to the intended vehicle.
Common Wheel Hub Bore Size Reference
Hub bore size varies by vehicle brand and platform. The table below shows common ranges buyers reference when starting a custom forged wheel enquiry — always confirm the exact figure against the vehicle or current wheel before ordering.
| Vehicle Category | Typical Hub Bore Range | Common PCD Examples |
|---|---|---|
| Compact / sedan passenger cars | 54.1mm – 57.1mm | 4×100, 5×100, 5×108 |
| Mid-size / performance sedans | 56.1mm – 66.6mm | 5×112, 5×114.3 |
| SUVs / crossovers | 60.1mm – 72.6mm | 5×114.3, 5×120 |
| Trucks / heavy-duty vehicles | 77.8mm – 87.1mm | 6×135, 6×139.7 |
What Is Wheel PCD?
PCD stands for Pitch Circle Diameter. It describes the bolt pattern used to mount the wheel to the vehicle hub. A PCD is normally written as the number of wheel bolts followed by the circle diameter, for example 5×112 or 6×139.7.
For a custom wheel project, the PCD must match the vehicle application. Do not estimate it from a wheel photo or general vehicle category. Confirm the exact vehicle make, model, year, trim, and required bolt pattern.
What Is Center Bore?
Center bore is the diameter of the center opening on the wheel. It is relevant to how the wheel locates on the vehicle hub. Buyers often search for “hub bore,” “center bore size,” or “wheel hub size” when preparing a custom wheel enquiry.
For an OEM or private label project, provide the required center bore or detailed vehicle information so the fitment can be reviewed. Do not assume that one center bore will suit every vehicle application.
What Is Wheel Offset?
Offset describes the relationship between the wheel mounting surface and the wheel centerline. It affects how far the wheel sits inward or outward in the wheel arch and can influence brake clearance, suspension clearance, tire clearance, steering behavior, and the intended visual stance.
PCD, Center Bore & Offset Comparison
| Specification | What It Defines | Information Needed for a Quote |
|---|---|---|
| PCD | The bolt pattern used to mount the wheel. | Exact PCD or vehicle make, model, year, and trim. |
| Center bore | The diameter of the wheel’s central hub opening. | Required hub bore or vehicle hub information. |
| Offset | Wheel position relative to the mounting surface and centerline. | Target offset, current wheel specification, and clearance requirements. |
| Wheel width | The width of the wheel barrel. | Required width, tire direction, and intended vehicle use. |
| Brake clearance | Space needed for the vehicle brake system. | Brake package information, drawings, or measurements where available. |
Why These Specifications Matter for Custom Forged Wheels
Custom forged wheels are often selected for exact vehicle fitment, design flexibility, finish options, and premium positioning. That makes specification accuracy essential before samples or bulk production are approved.
- Incorrect PCD can prevent the wheel from mounting correctly.
- Incorrect center bore can create hub-fitment issues.
- Incorrect offset can affect wheel position and clearance.
- Incorrect width can affect tire fitment and body clearance.
- Ignoring brake clearance can create a product that is unsuitable for the intended vehicle.
How to Collect Fitment Information
The best starting point is the current wheel specification or the exact vehicle details. Buyers should collect information from reliable vehicle documentation, the existing wheel, or qualified fitment resources before finalizing a custom forged wheel order.
| Information Source | Useful Details |
|---|---|
| Current wheel markings | Diameter, width, offset, PCD, center bore, and part or style references where marked. |
| Vehicle documentation | Vehicle make, model, year, trim, original wheel and tire information. |
| Brake information | Standard or upgraded brake package, clearance requirements, and relevant dimensions. |
| Vehicle photos | Current wheel position, body clearance, brake setup, suspension, and visual target. |
Fitment Checklist for Private Label Wheel Buyers
- Confirm vehicle make, model, year, and trim.
- Confirm target wheel diameter and width.
- Confirm the required PCD.
- Confirm center bore or hub-bore requirement.
- Confirm target offset or current wheel specification.
- Confirm tire direction and intended vehicle use.
- Identify any brake, suspension, body, or clearance changes.
- Request a written wheel specification before sample or bulk production approval.
Copy-and-Paste Custom Wheel Fitment Enquiry
- Vehicle make, model, year, and trim:
- Current wheel specification, if known:
- Required wheel diameter and width:
- PCD:
- Center bore:
- Target offset:
- Tire size or tire direction:
- Brake or suspension modifications:
- Design and finish preference:
- Quantity and destination country:
Frequently Asked Questions
What is the difference between PCD and center bore?
PCD describes the wheel bolt pattern. Center bore describes the size of the wheel’s central hub opening. Both are important fitment specifications, but they describe different parts of the wheel.
Can I change wheel offset?
Offset changes should be reviewed with the complete wheel, tire, brake, suspension, and vehicle-clearance setup. Confirm the intended fitment with qualified technical support before finalizing an order.
What is needed to quote a custom forged wheel?
Provide vehicle details, wheel diameter, width, PCD, center bore, offset, tire direction, brake-clearance information, finish preference, quantity, and destination country.
Request a Custom Forged Wheel Fitment Review
Send us your vehicle application, required PCD, center bore, offset, wheel size, design direction, quantity, and destination. We will help structure a clearer forged wheel quotation request.
Request a Fitment Quote →Ready to Source Forged Wheels?
- Custom Forged Wheel Manufacturer — one-off and OEM custom projects
- Private Label Forged Wheels — your brand, caps and packaging
- Forged Wheel Dealer & Wholesale Program — for distributors, shops and online retailers
Send your vehicle, size, PCD, ET, center bore, finish, quantity and destination through our quote request form.
Get a quick forged wheel quote
Send your vehicle platform, wheel size, PCD, offset, finish and quantity. We confirm fitment and reply within 24 hours.
Pingback: Forged Wheel RFQ Checklist & Template
Pingback: Forged Wheel Concavity & Spoke Design