How To Mesure
Important Information to Keep in Mind
Please make sure to review the information in this section carefully before placing your order. It will also be useful when you begin installing the spacers on your vehicle.
If you have already received your spacers and need basic guidance on how to install them, we recommend visiting the installation section. If you are not familiar with the process, we strongly suggest contacting a professional garage to carry out the installation safely.
If you cannot find the information you are looking for, please reach out to our support team. One of our technical specialists will be happy to assist you.
FAQs
What Does Pitch Circle Diameter (PCD) mean?
PCD stands for Pitch Circle Diameter, and it refers to the bolt pattern used to attach a wheel spacer or a wheel to the vehicle hub. This measurement is essential when choosing the correct fitment, as it varies between different car brands and even between models of the same brand.
For example, many Jeep models use a PCD of 5×110. One such example is the Jeep Cherokee KL.
So, what does 5×110 mean?
The number 5 represents the number of bolts or studs that secure the wheel in place.
The number 110 indicates the diameter, in millimetres, of the imaginary circle that passes through the centre of all the bolt holes.
If you were to draw a circle through the centre of each bolt hole, the distance across that circle from one side to the other would be 110 mm in this case.
Choosing the right PCD ensures that your wheel spacers or wheels fit safely and correctly on your vehicle. Always double check your vehicle’s specifications before ordering.
What is the Center Bore (CB)?
The Center Bore (CB) refers to the diameter of the hole in the back of the wheel that fits over the hub lip on your vehicle. This hole allows the wheel or spacer to sit perfectly centred on the hub, which is essential for proper alignment and a smooth drive.
Different vehicles use different center bore sizes depending on the make and model. For example, many Jeep models have a center bore of 65.1 mm. That means the raised lip on the hub that the wheel fits onto has a diameter of 65.1 mm.
To measure the center bore, take the diameter of the hub lip from edge to edge. In custom applications, we may also request the depth or length of the hub lip to ensure an accurate fit.
Choosing the correct center bore size is key to avoiding vibrations, uneven wear or unsafe installation when fitting wheel spacers or aftermarket wheels.
If you are unsure about anything, feel free to contact our customer service team. One of our specialised technicians will guide you through the process and help you every step of the way.
What Is Wheel Offset and Why Does It Matter?
Wheel offset refers to the distance between the centreline of the wheel and the flat surface that mounts onto the vehicle’s hub. In simple terms, it helps determine how far the wheel sits in or sticks out from the body of your car.
Getting the correct offset is important for both safety and appearance. It affects how your wheels align with the bodywork, how the suspension performs, and whether the wheel may come into contact with the brake calipers, wheel arches or inner components.
If the offset is too high or too low, the wheel could rub against the brake system, leading to noise, uneven wear, heat buildup or even brake failure over time. This is especially important on cars with larger aftermarket brakes or limited clearance in the wheel well.
*Note: The thickness of wheel spacers is always shown in millimetres (mm).
Types of Wheel Offset:
Positive Offset
This means the mounting surface is located closer to the outside edge of the wheel.
It is common in most modern front wheel drive vehicles.
The wheel sits deeper inside the wheel arch, closer to the suspension.
Zero Offset
The mounting surface is positioned exactly in the centre of the wheel.
This creates a balanced setup between inner and outer clearance.
Negative Offset
Here, the mounting surface is closer to the back side of the wheel, toward the car.
The wheel sits further out from the vehicle, creating a wider and more aggressive stance.
This setup is often used in off-road vehicles or custom builds.
How Do You Measure for Hubcentric Wheel Spacers?
Before installing hubcentric wheel spacers, it is essential to accurately measure the length of the hub spigot on your vehicle. Not all spacers are compatible with every car and in some cases, they may only fit the front or rear axle due to differences in hub spigot dimensions.
The hub spigot is the lip that protrudes from the vehicle’s hub and ensures proper centring of the wheel or spacer. This lip must fit entirely within the internal bore of the spacer. If the spacer is thinner than the spigot, it will not sit flush which may cause clearance issues or an incorrect fit.
For example, if your vehicle’s hub spigot measures 14mm in length, you will need a spacer that is at least 15mm thick. Using a 10mm or 12mm spacer would not be suitable since the spigot would interfere with the mounting face.
If you are planning to install spacers on both axles, make sure to measure the hub spigot at the front and rear separately as they may not be the same. Use a ruler or caliper to measure from the hub face to the end of the spigot. Always take the measurement in millimetres.
The illustration below shows exactly how to measure the hub spigot to ensure the correct fit for your wheel spacers.
How Do I Know What Size Hubcentric Spacers to Buy?
Once you have confirmed the minimum thickness that fits your hub spigot correctly, the next step is to determine the ideal width of the spacers for your vehicle. This will depend on your specific setup and how much you want the wheels to sit outward.
To calculate the correct size, measure the distance between the current position of the wheel and where you would like it to sit within the wheel arch. This gap will help you decide the exact thickness needed for both performance and appearance.
How to Measure for Centre Bore Adapters
If you are purchasing Centre Bore Adapters and your new wheels have a smaller centre bore than your vehicle’s hub, it is essential to measure the length of the hub spigot. This measurement helps determine if the adapter will seat correctly without interference. For instance, a 15mm adapter will only fit properly if your hub spigot is shorter than 13mm.
On the other hand, if the new wheels have a centre bore that is larger than your vehicle’s hub by at least 5mm, you usually will not need to measure the spigot length. However, if the difference is less than 5mm, you should always check the spigot length before purchasing. We recommend contacting our team if you are unsure which adapter will provide the correct fit.
How to Measure for Studded Wheel Spacers or Adapters
Before purchasing studded wheel spacers or adapters, it is important to consider whether the factory studs on your vehicle might interfere with the proper installation. You will need to determine the amount of stud that extends beyond the hub and whether your wheels have enough clearance at the back to accommodate this.
To check this, start by measuring the length of the studs that protrude from your hub. Then measure the depth of any recesses or pockets on the back of the wheels. These pockets are essential for allowing excess stud length to sit without obstruction.
For example, if you plan to install 20mm spacers and your studs extend 25mm from the hub, your wheels must have at least 5mm deep recesses. If the wheels provide that clearance, no modifications are necessary.
However, if the wheels do not have pockets or the recesses are not deep enough, you may need to shorten the studs to allow the spacers to sit flush. Another option would be to choose thicker spacers or adapters to avoid any interference.
If you are unsure, please contact our team before placing your order. We will help you ensure the right fitment for your vehicle.