PCD 6x139.7 CB95.1 Wheel Spacer Adapter

The PCD 6x139.7 CB95.1 Wheel Spacer Adapter manufactured by China supplierJ&W Auto Parts is developed from our over 20 years of manufacturing experience in automotive fasteners and wheel accessories. This product is specifically engineered for vehicles with a 6x139.7 bolt pattern and 95.1mm center bore, a configuration widely used across many Japanese and American pickup trucks and SUVs. By precisely increasing track width, By increasing wheel clearance and track width, the adapter helps accommodate larger tire configurations and provides a more aggressive wheel stance. Every unit is machined from forged aluminum alloy blanks, heat treated for structural strength, and finished with surface protection against corrosion, delivering reliable performance in both daily driving and demanding off-road conditions.

What’s this Wheel Spacer Adapter and what is it for?

The PCD 6x139.7 CB95.1 Wheel Spacer Adapter is a disc-shaped aluminum component installed between the vehicle's hub and wheel. It bolts to the existing hub using the original lug nuts, and the wheel then mounts to the adapter's integrated studs. This two-stage connection pushes the wheel outward by a set distance, effectively widening the vehicle's track.

The 6x139.7 refers to the bolt pattern: six lug holes arranged on a circle with a diameter of 139.7mm, which is standard on many off-road and pickup platforms. The 95.1mm center bore ensures the adapter centers precisely on the hub, reducing vibration and preventing stress on the wheel studs.

The adapter serves three core functions. First, it widens the track, increasing track width and improving wheel positioning, which may contribute to improved handling characteristics when properly installed. Second, it creates additional clearance for larger or wider tires, preventing interference with suspension components during turns or articulation. Third, it positions the wheels flush with the fenders for a more balanced and aggressive stance.

How we select material and manufacture the wheel spacer adapter?

Material selection and manufacturing processes directly determine the performance and service life of a wheel spacer adapter. J&W Auto Parts maintains clear quality standards in this area.

High-Strength Forged Aluminum Alloy

We use automotive-grade forged aluminum alloy for wheel spacer adapters. Forging helps achieve consistent material structure and mechanical performance required for wheel accessory applications. Alloy selection and heat treatment parameters are controlled according to product performance requirements.

Controlled Heat Treatment Process

After forging, each blank undergoes controlled heat treatment to achieve stable mechanical properties and dimensional consistency. Specific heat treatment parameters are managed according to the selected aluminum alloy grade and application requirements.

High-Precision Threads and Mounting Surfaces

The integrated studs and all mounting surfaces are machined to tight tolerances. This is not cosmetic; it ensures the adapter fits flush against the hub and that the wheel mounts without wobble. Poorly machined adapters can cause vibration, premature bearing wear, and even wheel detachment. J&W's CNC equipment guarantees consistency across every piece.

Surface Protection

Every adapter receives an anodized or electroplated finish. Anodizing creates a hard, corrosion-resistant oxide layer on the aluminum surface, effectively protecting against moisture, road salt, and brake dust. This protection is especially important for off-road vehicles and winter driving conditions. Colors can be customized per customer requirements.

Batch-to-Batch Consistency

Standardized forging dies and CNC programs ensure that from the first piece to the thousandth, dimensions and performance remain consistent. For bulk purchasers, this means confidence in receiving uniform quality without the need for repeated inspection.

Internal validation tests have been conducted on selected forged spacer designs, including fatigue and corrosion resistance evaluation.

Product Parameters

Whole Production Workflow

The production of the PCD 6x139.7 CB95.1 Wheel Spacer Adapter follows these steps.

1. Forging. Aluminum bars are pressed under high pressure into rough shapes matching the product design. This step eliminates internal defects and significantly improve blank strength.

2. Heat Treatment. The forged blanks are heated and cooled under controlled conditions to achieve the designed mechanical properties, ensuring uniform hardness throughout the adapter.

3. CNC Precision Machining. Over 20 machining centers perform drilling, boring, and surface finishing on the blanks. Bolt hole positions, center bore diameter, thickness, and flatness are all controlled to tight tolerances.

4. Surface Treatment. The adapters are anodized or electroplated for corrosion protection, with custom colors available upon request.

How do we verify quality?

Every PCD 6x139.7 CB95.1 Wheel Spacer Adapter undergoes multiple inspection stages, not just a single spot check.

Raw Material Testing. Incoming aluminum is analyzed with a spectrometer to confirm its chemical composition matches the specified grade, preventing substandard or misidentified material from entering production.

In-Process Monitoring. During forging and heat treatment, sample pieces are tested for hardness and strength. If deviations are detected, process parameters are adjusted in real time.

Dimensional Inspection. Finished adapters are measured for bolt hole positions, center bore diameter, thickness, and thread quality using precision gauges to ensure each unit meets tolerance requirements.

Assembly Verification. We test fit the adapter with actual hub and wheel fixtures to confirm real-world installation with no interference or wobble, catching any tolerance stack issues that individual measurements might miss.

Surface Inspection. Each unit is visually checked for finish uniformity, color consistency, and visible defects before packaging.

Salt Spray Testing. Corrosion resistance of the surface treatment is verified through salt spray testing as required, ensuring long-term reliability in humid and salty environments.

All production batches are assigned a unique batch number which ensures full traceability from finished adapter to original aluminum billet,also a critical requirement for OEM and fleet buyers.

Installation Steps

Installing the PCD 6x139.7 CB95.1 Wheel Spacer Adapter requires standard workshop tools. Follow these steps.

1. Clean the hub mounting surface and the adapter's contact faces. Remove dirt, rust, or debris.

2. Position the adapter over the vehicle's existing wheel studs.

3. Secure the adapter using the original lug nuts. Tighten in a star pattern to the torque specified in your vehicle manual.

4. Mount the wheel onto the adapter's integrated studs.

5. Install the supplied lug nuts and tighten in a star pattern to the wheel's recommended torque.

6. After driving 80 to 100 km, re-torque all fasteners to account for initial seating.

Routine Maintenance

Routine maintenance is straightforward. Perform regular checks on the following items.

1. During tire rotations or brake service, inspect the adapter for visible damage or looseness.

2. Confirm that the original lug nuts securing the adapter remain tight.

3. Verify that the wheel mounting nuts are at proper torque.

4. For vehicles used in off-road or winter conditions with road salt, clean the adapter surfaces periodically to prevent buildup.

5. Replace the adapter if cracks, severe corrosion, or deformed mounting holes are found.

Important: Please ensure your wheel studs have sufficient thread engagement after installing the spacer. We recommend checking with your vehicle manufacturer’s specifications. Our team can advise on the correct thickness to maintain safety.Installation should be performed according to vehicle manufacturer torque specifications.

Certifications Certified

Our manufacturing system follows ISO9001 and IATF16949 automotive quality management requirements.

ISO9001. Our quality management system is certified from raw material procurement to final delivery. For you, this means consistent quality across every batch, with traceable production records.

TUV. Our wheel spacers have been independently tested by TUV Rheinland (Germany) for dimensional accuracy, material strength, and fatigue resistance. provides additional verification of manufacturing and quality control processes

IATF 16949. This is the highest automotive industry standard, developed for OEM parts suppliers. Our certification confirms that we apply the same process controls and defect prevention used for factory-installed components.

SGS. SGS provides independent, third-party verification of our product quality and manufacturing capability. For buyers, this reduces the need for separate factory audits and shortens supplier qualification time.

EEC. This permits our wheel spacers to be sold freely across European Economic Community member states, removing regulatory barriers for European distributors and end users.

Why Global Buyers Choose Wheel Spacer Adapter J&W Auto Parts?

Manufacturing capacity. Our Ningbo factory spans over 10 acres with more than 100 employees, equipped with 12 cold heading machines, over 20 CNC machining centers, and an automated electroplating line, ensuring stable production capacity.

Quality systems. We implement 5S management across production. Our QC department is equipped with spectrometers, hardness testers, and salt spray testers for comprehensive material and product testing.

Complete product range. Beyond wheel spacers, we supply wheel nuts, wheel bolts, and various fasteners, enabling one-stop sourcing and reducing supplier management costs for buyers.

Custom services. We accept non-standard thicknesses, bolt patterns, center bores, surface colors, and packaging designs. Our technical team develops new products based on customer drawings or samples.

Export experience. Our products have been exported to Europe, North America, Southeast Asia, and the Middle East, serving both distributors and OEM service. We have proven experience in handling international order lead times and packaging requirements.

1. Warranty Claim Process:

1. Submit photos and batch number

2. Engineering review within 3 working days

3. Root cause analysis

4. Replacement shipment

2. Warranty covers:

· Material defects

· Manufacturing defects

Excludes:

· Incorrect installation

· Accident damage

· Unauthorized modification

FAQ

Q1: How do I confirm if this adapter fits my vehicle?

Check your vehicle's bolt pattern (6x139.7) and center bore (95.1mm). If the center bore differs, we offer custom machining.

Q2: What thickness should I choose? 

Thickness depends on your wheel offset, tire size, and clearance requirements. Common options range from 15mm to 50mm. Provide your vehicle details, and we can help recommend the right size.

Q3: Does the adapter come with mounting nuts? 

Yes. Each set includes integrated studs and the lug nuts for mounting the wheel. The original lug nuts are used to secure the adapter to the hub.

Q4: What surface colors are available? 

We offer anodizing in silver, black, and custom colors. Electroplating is also available.

Q5: Can I get samples before mass production? 

Yes. Pre-production samples are available for fitment confirmation, with a typical lead time of 5 to 7 working days.

For more inquiries and technical support, please contact us directly at admin@jwautopart.com or find us at WhatsApp +86 139 6824 8530 (response within 10 working hours) or welcome visiting our factory No.539 Guangyi Road, Guanhaiwei Town, Cixi, Ningbo, Zhejiang, China.