What size are the wheel nuts on a Subaru Outback?
The wheel nuts on most Subaru Outback models are M12 x 1.25 with a 60-degree conical seat, and you’ll typically use a 19mm socket to install or remove them.
That said, lug hardware can vary by year, trim, and wheel type. If you’re working with aftermarket wheels or a specific older model, verify the exact specifications for your vehicle to avoid compatibility issues.
Core lug nut specifications you’ll encounter
Here are the core specifications you’re likely to see when servicing or replacing wheel hardware on a Subaru Outback. These apply to most late-model Outbacks, but always confirm for your exact year and wheel setup.
- Thread size and type: M12 x 1.25 (metric lug studs with a 1.25 mm pitch).
- Seat type: 60-degree conical (also called a conical or acorn seat).
- Socket size: 19 mm for standard factory lug nuts.
- Bolt pattern: 5-lug, typically 5x100 mm on most Outback models.
These are the usual specs for factory-equipped Outbacks. If you have aftermarket wheels or a different year, specs can vary.
How to confirm for your specific vehicle
Use these steps to verify the lug nut size for your exact Outback:
- Check the owner's manual or the service manual for wheel and lug nut specifications.
- Inspect the lug nuts themselves; some have the size stamped on the nut head or nearby hardware.
- Measure the stud diameter and thread pitch with a thread gauge or calipers if you have access to them.
- Ask a Subaru dealer or a trusted tire shop with your VIN to confirm exact specs for your year and trim.
Following these steps will help ensure you use the correct lug nuts and avoid compatibility issues with wheels.
Notes about aftermarket wheels
If you’re fitting aftermarket wheels, you may encounter different lug nut sizes, seat types, or even bolt patterns. Always verify compatibility with the wheel manufacturer and use the lug nuts specified for those wheels.
Summary
In brief, most Subaru Outbacks use M12 x 1.25 lug studs with a 60-degree conical seat and require a 19mm socket for installation or removal. Always confirm the exact specs for your year, trim, and any aftermarket wheels to ensure proper fitment and safety.
