Hub Adapters

Precision Hub Adapters & PCD Conversion Kits – CNC Machined in the UK

Brightstone Engineering produces high-quality hub adapters (also known as PCD adapters) for fitting wheels with different bolt patterns. Whether you’re converting BMW 5x120 to 5x114.3 or fitting aftermarket wheels from another brand, our CNC-machined aluminium adapters make it possible – safely and securely.

Each PCD adapter kit is designed and machined in the UK from strong, lightweight 6082-T6 aluminium and includes:

  • Precision-machined adapters with dual bolt patterns
  • Correct hubcentric centre bore for your vehicle
  • Extended wheel bolts or studs included where required
  • Black anodised finish for corrosion resistance

Hub adapters are perfect for stance setups, brake clearance, or fitting rare wheels across brands. We offer stock PCD conversions and custom hub adapters for unique applications – including BMW, Audi, Porsche, Mercedes, and more.

Designed and built in the UK with fast shipping and a 2-year warranty. Browse our available kits below or contact us to request a custom configuration.

Also see our Wheel Spacers and Gearbox Adapters

Not sure if any of these products fit your car? Can’t see your model or want a set for a model that's not listed? Get in touch — we’ll reply within 24 hours.
Contact us
  • Wheel PCD custom adapters

    Custom PCD Adapter

    Custom PCD Adapter

    £280.00 GBP
    £280.00 GBP

Hub Adapter & PCD Conversion FAQ

What are hub adapters and PCD conversion kits?

Hub adapters (also known as PCD conversion kits) allow you to fit wheels with a different bolt pattern to your vehicle’s original hub. They’re ideal for installing aftermarket or Alloy Wheels from other brands, or for achieving the perfect stance without compromising safety.

Are hub adapters safe to use?

Yes — when engineered and installed correctly, hubcentric hub adapters are completely safe. All Brightstone Engineering adapters are CNC machined from aerospace-grade 6082-T6 aluminium for exceptional strength and accuracy. They replicate OEM hub geometry, ensuring a vibration-free and structurally sound fit.

What’s the difference between hub adapters and wheel spacers?

Wheel spacers push your existing wheels outward for better stance or brake clearance, while hub adapters change your vehicle’s bolt pattern (e.g. 5x120 to 5x114.3). Both can improve handling and appearance, but adapters enable cross-brand wheel fitment where the PCD differs.

Can I use hub adapters to fit Alloy Wheels from another brand?

Yes — that’s exactly what they’re for. Our PCD adapters make it possible to safely fit Alloy Wheels from brands such as Audi, Mercedes, or Nissan onto BMW, VW, or Porsche hubs. We can produce custom adapters to match almost any PCD combination or centre bore requirement.

Are hub adapters legal in the UK?

Yes. Brightstone Engineering hub adapters are UK road legal when fitted correctly using the supplied hardware. Each unit is precision balanced and manufactured to meet or exceed OEM safety tolerances, ensuring long-term reliability on both road and track vehicles.

How do I install hub adapters?

Installation involves bolting the adapter to your vehicle’s hub using the included hardware, then mounting your new wheels to the adapter’s secondary bolt pattern. Always clean the hub face, torque to specification, and recheck after 50–100 miles. For detailed guidance, refer to our fitment and installation guide.

What materials are your hub adapters made from?

Every Brightstone Engineering adapter is CNC machined in the UK from solid billets of 6082-T6 aluminium, chosen for its strength-to-weight ratio and corrosion resistance. Each adapter is black anodised for a professional, durable finish.

Do hub adapters affect handling?

Yes — when used correctly, hubcentric adapters can enhance stability by widening track width slightly. They also allow for more precise wheel offset adjustments, improving stance and clearance for performance brake systems or wider Alloy Wheels.

Do you make custom hub adapters?

Absolutely. We can manufacture custom hub adapters and PCD conversions for virtually any vehicle or wheel combination. Whether you’re building a stance car, restoring a classic, or fitting rare wheels, we can produce bespoke adapters to your exact measurements on our Haas CNC machines.

All Brightstone Engineering hub adapters are precision CNC-machined in the UK, anodised for long-term protection, and supplied with the correct hardware for your vehicle. Backed by a 2-year warranty and trusted by enthusiasts fitting custom Alloy Wheels across brands.

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