The lug nuts on a 2018 Honda Fit use an M12x1.5 thread with a 60-degree conical (acorn) seat, on a 5x114.3 mm bolt pattern, and you’ll typically need a 19 mm wrench/socket to install or remove them.
Understanding the lug-nut specifications
Below are the core specifications you’ll need to know for the 2018 Honda Fit when replacing lug nuts or selecting wheels. The information covers thread size, seat type, bolt pattern, and the common wrench size used.
- Bolt pattern: 5x114.3 mm (5 lug holes on a 114.3 mm circle)
- Thread size: M12x1.5
- Seat type: 60-degree conical (acorn) seat
- Wrench/socket size: 19 mm across flats
- Typical torque target (during installation): approximately 80 ft-lb (108 Nm); consult the owner's manual for the exact specification
For wheel compatibility, ensure any replacement lug nuts or wheels match the 5x114.3 mm bolt pattern and that the seat type and thread pitch are correct for your vehicle’s hubs and wheels. Using the incorrect lug-nut size or seat can lead to improper seating and safety concerns.
Practical guidance for installation and maintenance
Before you work on the lug nuts, review these steps to ensure proper installation and long-term reliability. The following steps assume you are working with OEM-compatible parts and a standard torque wrench.
- Confirm you have the correct lug nuts for the 2018 Fit (M12x1.5, 60° conical seat) and that wheels are compatible with a 5x114.3 bolt pattern.
- Prepare the wheel surface: clean the hub bore and the wheel mounting surface to remove debris and corrosion.
- Hand-thread each lug nut onto the studs in a star/cross pattern to center the wheel before tightening.
- Torque gradually in a cross pattern to the manufacturer’s recommended specification (approximately 80 ft-lb / 108 Nm). If you don’t have the exact spec from the manual, aim for a torque around 80 ft-lb and verify with the official guidance.
- After initial installation, re-torque the lug nuts after 50–100 miles of driving to account for settling.
Maintaining proper lug-nut torque helps ensure wheel security, proper clamping force, and even load distribution across the wheel faces. Avoid using anti-seize compounds on the lug threads for most modern alloys, as they can alter torque readings; follow the vehicle’s service manual for guidance.
Summary
In short, the 2018 Honda Fit uses lug nuts with an M12x1.5 thread and a 60-degree conical seat, on a 5x114.3 bolt pattern, typically installed with a 19 mm wrench. Torque them to about 80 ft-lb (108 Nm) and recheck after the first few miles to ensure a secure fit. Always refer to the owner’s manual or service documentation for the exact torque specification and any model-year variations.