What size are the wheel nuts on a 2015 Civic Si?
They use standard Honda lug nuts: M12 x 1.5 thread with a 19 mm hex, on a 5x114.3 mm bolt pattern.
Core specifications for the 2015 Civic Si
The following specifications cover the factory configuration and are generally applicable to OEM wheels. Aftermarket wheels or lock nuts may require different sizes or seat types.
- Bolt pattern: 5x114.3 mm (5 studs, 114.3 mm apart across the wheel)
- Lug thread size: M12 x 1.5
- Lug nut type: conical (acorn) seat
- Lug nut hex size: 19 mm
- Typical torque for installation: approximately 80 ft-lbs (about 108 Nm)
These specifications apply to the stock setup and many aftermarket wheels that use the same seating and thread standards. For wheels or lug nuts from aftermarket suppliers, verify compatibility and torque requirements in the manufacturer’s guidelines and your vehicle’s manual.
Details and practical notes
Why these specs matter for maintenance
Using the correct thread size and lug nut type ensures proper seating and fastener engagement, which is essential for wheel security and safety. The 19 mm lug nut hex size is the common wrench size for this model, so you’ll typically use a 19 mm socket or lug wrench for installation and removal.
Aftermarket wheels and alternatives
When fitting aftermarket wheels, ensure the wheel’s bolt pattern, offset, and hub bore match the vehicle’s specifications, and confirm lug nut seat type and thread size. If the wheels use a different seat or must use locking lug nuts, consult the wheel manufacturer and a qualified technician to select the correct fasteners and torque.
Summary
For a 2015 Honda Civic Si, the wheel nuts are M12 x 1.5 with a 19 mm hex, fitting a 5x114.3 mm bolt pattern. The typical installation torque is around 80 ft-lbs, though you should always verify exact specs in the owner's manual or with the wheel manufacturer, especially when using aftermarket wheels.
What size lug nuts are on a 2015 Honda Civic?
The 2015 Honda Civic lug nut size is M12 x 1.50 with a 3/4-inch (or 19mm) hex and a radius seat for the original equipment wheels. It's important to verify the specific size with your owner's manual or wheel manufacturer, especially if you have aftermarket wheels, as different seats and lengths may be required.
Key specifications
- Thread Size: M12 x 1.50
- Hex Size: 3/4" or 19mm
- Seat Style: Radius seat (for OEM wheels)
- Thread Direction: Clockwise
Important considerations
- Factory vs. Aftermarket: The specifications above are for the original equipment wheels. Aftermarket wheels may require a different seat style (like cone or ball) and a different length or hex size.
- Verification: Always confirm the exact specifications for your specific vehicle and wheel combination by checking your owner's manual or contacting the wheel manufacturer.
- Torque: The correct torque specification is also crucial for proper installation and safety. This can be found in your owner's manual.
What size are the lug nuts on a Honda Civic Si?
The Honda Civic Si lug nut size is M12 x 1.5. This applies to most modern generations of the Civic, including the Si. The lug nuts have a conical seat and a typical hex size of 19mm (3/4") or sometimes 22mm for certain high-performance models.
- Thread Size: M12 x 1.5
- Hex Size: Most commonly 19mm (3/4"), but some performance models may use 22mm, so it's best to check your specific model.
- Seat Type: Conical, 60-degree
- Torque Spec: 108 Nm (80 ft-lb)
What size socket for Honda lug nuts?
What Size Honda Lug Nuts Do I Need?
| Model | Year | Thread/ Socket Size |
|---|---|---|
| Accord | 2003-2020 | 19 mm |
| Civic | 2006-2020 | 19 mm |
| CR-V | 1997-2020 | 19 mm |
| Pilot | 2003-2020 | 21 mm |
What do M12x1.5 lug nuts fit?
Product Summary: Orion Motor Tech M12x1. 5 Lug Nuts,12x1. 5mm Wheel Lug Nuts Compatible with Toyota Camry Corolla Highlander RAV4 Tacoma, Honda Accord CR-V Civic Fit, Ford Escape Focus Fusion and More, Set of 20.
