The Audi S4 B8 uses M14x1.5 lug bolts for a 5x112 wheel pattern with a 60-degree conical seat. Typical bolt length is about 28–30 mm, and the recommended torque is around 110 Nm. Always verify exact specs for your model year and wheel setup in the owner's manual or with Audi service literature.
Bolt pattern and sizing
Key specifications to know when inspecting or replacing wheel hardware for the S4 B8 are the bolt pattern, thread size, seat type, and typical bolt length. The list below captures these core details.
- Bolt pattern: 5x112 mm (five lug holes on a 112 mm circle)
- Lug bolt size: M14x1.5 thread
- Seat type: 60-degree conical (lug seat)
- Typical lug bolt length: approximately 28–30 mm (length varies with wheel and rotor assembly)
- Thread direction: right-hand thread (standard)
These specs generally apply across the S4 B8 lineup with OEM or aftermarket wheels designed for a 5x112 pattern and M14x1.5 lug bolts.
Torque, length and installation considerations
Additional details that can vary by wheel setup include the proper torque, exact bolt length, and seat compatibility. The list below covers these factors to avoid installation issues.
- Torque specification: typically around 110 Nm (81 ft-lb) for lug bolts on the S4 B8
- Bolt length variations: depending on wheel offset, rotor thickness, and whether spacers are used
- Seat compatibility: OEM wheels use a 60-degree conical seat; some aftermarket wheels may require different seat types
- Security considerations: consider locking lug bolts if wheel theft is a concern
- Maintenance: replace damaged or stripped bolts; re-torque after wheel installation as recommended
Adhering to the correct size, seat, length, and torque is essential for safe wheel mounting on the S4 B8, especially when mixing OEM and aftermarket wheels.
Additional considerations for replacements
When sourcing lug bolts for replacements or upgrades, compatibility with aftermarket wheels and spacers is critical. The following points help ensure a proper fit.
- Always confirm wheel manufacturer specifications for seat type and required lug bolt length
- Aftermarket wheels or spacers can alter required bolt length or seat compatibility; confirm with the wheel maker
- Consider locking lug bolts for security if you park in areas where theft is a concern
With the right bolt size, seat, and torque, you can safely mount OEM or aftermarket wheels on the Audi S4 B8 and maintain proper clamping force.
Summary
The Audi S4 B8 uses a 5x112 bolt pattern with M14x1.5 lug bolts and a 60-degree conical seat. Typical bolt length is about 28–30 mm, and the standard torque is around 110 Nm. Always verify exact specs for your model year and wheel configuration in the owner's manual or Audi service documentation, and ensure any aftermarket wheels or spacers are compatible with these specs.