Hartmann Lug Bolts are made in Italy to the highest standards and meet QS-9000 quality certification standards as well as ISO/TS 16949 and ISO 9001 TUV certification.

Audi and VW vehicles using a 5x112 or 5x100 bolt pattern use a 14mm diameter bolt with a 1.5 thread pitch. OEM Audi and VW wheels use a ball seat bolt, OEM BMW wheels use a cone seat bolt. Aftermarket wheels typically use a cone seat bolt however some use a ball seat.

Hartmann Lug Bolt Specifications:

• Shaft Diameter: 14mm
• Bolt Head: 17mm Hex
• Thread Pitch: 1.50
• Seat Type: Cone

Hartmann Lug Bolt Manufacturing:
Hartmann bolts are constructed from high grade steel and are nickel plated for corrosion resistance.

Determining Lug Bolt Length for Spacers:

Remove one lug bolt and measure the length from the end of the threads to the bottom of the seat, add the spacer thickness to the bolt length. (Stock length + spacer thickness = new bolt length)

Hartmann Lug Bolt Install:

• Confirm the lugs are the proper length by threading a single bolt in by hand and counting the rotations until seated, you should get 7 rotations. Once seated rotate the wheel slowly to ensure the lug is not contacting any components on the inside of the hub.
• Install wheels in the air, using the brakes to stop the wheel from turning and torque the lugs to the vehicle manufacturers specified value first in a star pattern, followed by a circle.
• Re-torque the lugs after 1 week on brand new wheels.