BONOSS Forged Custom Wheel Spacers 6x139.7 to 5x150 Wheel Adapters

Adding custom wheel spacers provides many advantages, such as more stability, better handling, and more. Since there are various spacers existed in the automotive market, sometimes it is hard to find the correct ones you need. Rather than spend time and effort looking for them, it is better to customize a set of exclusive wheel spacers. Customizing wheel spacers is a great way to ensure a proper fit and enlarge the options of thicknesses, dimensions, colors, constructions, materials, and more.

If you’re considering custom wheel spacers to fit aftermarket wheels, you’ve come to the right place. We’ve got countless successful custom OEM wheel spacers cases. In order to help you sort out the requirements, we’ll cover some basic terms you may not be familiar with – such as bolt pattern, center bore, stud size, and more. Each term plays a critical role in whether the wheel spacers properly fit your vehicle.


Your custom wheel spacers should always avoid wheels rubbing, clear the braking components, suspension parts, and the fender of the vehicle. Generally, it is not recommended to use too many wheel spacers to stick your tires out past the fenders. Take a straight edge and place it against the outermost part of the rims/tires, then measure from the outside wheel to the fender line to see how much space you have available. At the BONOSS factory, custom wheel spacers from 3mm to 160mm are available.

Bolt Pattern (Dimension)

When people mention “the dimension of wheel spacers “, it simply means the bolt pattern. The bolt pattern determines whether the spacers fit your vehicle. It refers to the diameter of an imaginary circle formed by the centers of the wheel lugs. To figure out how big wheel spacers you need, it is necessary to know the bolt pattern. In a 5-lug wheel, measure from the back of a hole to the center of the second hole. To measure a 4 or 6 bolt wheel, you need to measure center to center of two holes directly across from each other. If you intend to custom wheel adapters, you need to measure the bolt pattern of both vehicle and the new wheel. At the BONOSS factory, larger dimension from 130mm to 350mm is available.

How Can I Custom Wheel Spacers BONOSS Forged Wheel Spacers Custom Service Rim Adapters


According to the structure of your hub assembly, the custom wheel spacers can be made lug-centric and hub-centric. In most cases, hub-centric wheel spacers are better. Because they help to make the wheel connection firm and stable. Furthermore, hub-centric wheel spacers are capable to transform lug-centric wheels into hub-centric ones. For example, if you want to convert a 66.5mm center bore to 73.1mm, 66.5 to 73.1 wheel adapters will be the solution.


We offer two materials for selection: forged 6061-T6 aluminum and 7075-T6 aluminum. Typically, both these two forged aluminum wheel spacers are of good strength, toughness, hardness, and corrosion resistance. For those looking for cheaper but more durable options, forged 6061-T6 custom wheel spacers are the way to go. Forged 7075-T6 aluminum wheel spacers are significantly stronger than 6061-T6 alternatives. For racing, drift, and hard-driving, forged 7075-T6 spacers are the best option.