Wheel bolts are standard on many European-made cars and use threaded rods attached to conical/ball seats that match the wheel inserts. The bolt passes from the wheel through the brake rotor cap and is directly threaded into the vehicle hub, locking all parts in place. Any time you run wheel spacers, you need longer lug bolts. If you have installed a wheel with a spacer using stock bolts, don’t be fooled by the fact that visually the wheel is securely fastened. Actually, the thread of stock bolts is enough for fastening the OEM wheels, when putting a spacer between the wheel and vehicle hub, the thread won’t be enough anymore. When your vehicle is loaded to capacity, an emergency maneuver performed at high speed may lead to a bolt failure.

BONOSS BMW M5 F90 Titanium Wheel Bolts Forged Thread 14x1.25 HRE Rim Bolts (6)

Proper Thread Lug Bolts to Install Wheel Spacers Safely

Lug bolts are hardware used to secure the wheel and tire assembly to the vehicle. Equipping your vehicle with the correct lug bolts is very important to ensure the safe and reliable mounting of the wheels. Common seat types of wheel bolts include conical seat, ball seat, flat seat, etc. If you use current wheels, just keep the same lug seat of extended wheel bolts. If you get aftermarket wheels, make sure you have lug bolts that will fit properly. If you have added wheel spacers, to meet proper thread engagement, the thread length of the extended wheel bolts should equal the length of stock bolts plus the thickness of the spacer. Giving an example, if your stock bolt’s length is 27mm, and you have installed 12mm wheel spacers, then 39mm lug bolts will be required. It is recommended that check whether the lug bolts are fit correctly or not by spinning the wheel while it’s off the ground, making sure it has 360-degrees of motion.

Where to Buy Extended Wheel Bolts?

BONOSS Forged Grade 12.9 Extended Wheel Bolts are engineered to allow full thread penetration with wheel spacers to ensure safe installation. Using wheel spacers without the proper thread length bolts will not allow the bolt to fully fasten the wheel to vehicle hub which can cause a safety risk. BONOSS wheel bolts come in multiple threads and lengths to match your spacer size, in stock with M14x1.5, M14x1.25, M12x1.5, M12x1.25, M15x1.25, and 1/2-20 UNF, rod length from 25mm (1”) to 75mm (3”) is available. They are made up of high-quality and durable JIS SCM440 steel material, which helps them not break in tough elements or conditions. Our extended wheel bolts have fully SGS, TUV ISO Grade 12.9 certified, tensile strength≥1,282Mpa, limited life range test≥2,000,000 stress cycles without damage, ultimate tensile load≥152,000N, hardness (HV)≥395, NSS≥192H… Only choose right hardware and installed correctly, your vehicle will have high-level performance, and your wheel spacer mod will be safe and beneficial.

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