Custom aftermarket wheels can not only add a personalized style but also enhance the handling performance of your vehicle. Therefore, when changing wheels, you can choose some non-original wheels according to your needs. Although many aftermarket alloy rims are designed to use your car’s stock lug nuts or wheel bolts, there are others that require new hardware. It can be something as central as the differences in the rim’s lug seat type, or something as simple as shorter heads of the lug bolts to fit the wheel’s center caps. Wheel bolts are relatively small components under extremely large forces, and they are absolutely critical to locking the wheel on your vehicle so that the seat type and other fitment are quite important.

How to confirm the seat type of bolts for your new wheels?

There are conical seats (also called “cone” or “tapered” seats), ball seats (also called “radius” or “rounded” seats), flat seats (also called “mag” seats), etc. A 60° Conical Seat is the most common and is found on most aftermarket wheels. But there may be differences, so please take a check to your new rims. You can get information from the wheel manufacturers or just touch the lug seat around directly with your fingers. Typically, for the factory wheels, the seat type of the lug bolts will be the same as the factory wheel bolts. For the aftermarket wheels, the seat type of the lug bolts must be the same as the type of the aftermarket wheels. It is essential that the wheel bolts seat and the wheel lug seat match. If the wheel bolts seat type does not fit the wheel lug seat type, it is possible that the wheel bolts would be bent or damage the wheel. The mismatch between bolts and wheels could potentially cause the bolt to loosen and the wheel to become insecure to the vehicle.

BONOSS Wheel Bolts Seat Type Example

Two-piece DesignBONOSS-Forged-Grade-12.9-Wheel-Bolts

Two-piece wheel bolts consist of a standard bolt with an extended smooth shank and a ball/conical gasket above the threads. It is the same design as the new Mercedes and Porsche vehicles factory lug bolts. The gasket structure effectively eliminates the bolts loosening and abnormal sound caused by the PCD hole coaxially deviation between the vehicle hub and wheels while driving. Besides, the two-piece design has a strong matching characteristic, suitable for most factory or aftermarket wheels, ensure your vehicle wheels are secure and properly fastened every time they are removed and installed. The gasket applied forged 7075-T6 aluminum alloy material, lightweight and high performance. The diameter of the bolt’s rod is larger than the diameter of the thread which improves the ultimate performance of bolts.

JIS SCM440 High-strength Steel Material

BONOSS Forged Grade 12.9 Wheel Bolts applied JIS SCM440 steel material. The SCM440 is a medium carbon chromium molybdenum alloy steel. The Chromium provides good hardness permeability and Molybdenum gives hardness uniformity and high strength. It also has good ductility and high-temperature stress resistance, structural stability, low harmful elements, small decarburization layer, few surface defects, and more advantages. Wheel Bolts made of Forged SCM440 alloy steel features many desirable properties such as high strength, wear-resistance, excellent toughness, impact resistance, and high-temperature resistance.

BONOSS offers a full line of wheel bolts to suit your new wheels. They are engineered in different lengths to match many vehicles. All BONOSS Wheel Bolts are manufacturing in the OEM factory and backed by thousands of successful solution experience. We’re up to date on various thread sizes as well – M14x1.5, M14x1.25, M12x1.5, M12x1.25 and M15x1.25, 1/2-20 UNF so that we can provide wheel bolts for most vehicle models in the market. Our lug wheel bolts are thoroughly tested and inspected, certified by SGS, TUV authoritative institutions, truly guarantee safety.