What size are Subaru lug nuts?
Subaru lug nuts don’t have a single universal size. In most modern Subarus, wheel studs are 12 mm in diameter with common thread pitches of 1.25 or 1.5, and the lug nuts typically use a 60-degree conical seat. The exact size depends on model, year, and wheel specifications. Always verify with the owner’s manual or Subaru parts catalog before purchasing replacements.
Understanding lug nut sizing matters for safe tire changes, proper wheel seating, and avoiding damage to wheels or hubs. This article explains why Subaru lug nut sizes vary, how to identify the correct size for your vehicle, and practical steps to ensure you’re using the right parts.
Common sizes and seat types
The following sizes and seat types cover what you’re most likely to encounter on a wide range of Subaru models. Variations can occur based on year, trim, and aftermarket wheels.
- Thread size: M12 x 1.25
- Thread size: M12 x 1.5
- Lug nut seat type: 60-degree conical seat (the most common for Subaru wheels); some wheels may use a ball seat or other seat styles
Note: Seat type and thread pitch must match both the wheel and the hub design. If you mix mismatched seats or pitches, lug-nut seating can be compromised and wheels may not be secured properly.
How to determine the correct lug nuts for your Subaru
To avoid guessing, use these steps to confirm size and fitment.
- Check the owner’s manual, service guide, or Subaru parts catalog for the exact lug nut size and seat type for your model and year.
- Inspect the lug nuts currently installed on your car to identify the thread pitch, thread diameter, and seat type.
- Measure thread diameter and pitch with calipers or a thread gauge, and compare to standard Subaru specifications for your model.
- If you have aftermarket wheels, verify with the wheel manufacturer or a Subaru dealer that the lug nuts are compatible with both the wheel and hub.
- When in doubt, contact a Subaru dealer or trusted tire shop with your VIN and wheel details to confirm the correct lug nut size.
Following these steps ensures you select lug nuts that fit properly and keep wheels secure under operation.
Safe installation and torque
Torque specifications vary by model, but you should always follow the exact value in your owner’s manual. A typical range for many Subaru models is around 80–100 ft-lbs (110–135 Nm). Use a star pattern to evenly tighten and recheck torque after a short drive to ensure the nuts seat correctly and none loosen.
Summary
There isn’t a single Subaru lug nut size. Most modern Subarus use M12 studs with thread pitches of 1.25 or 1.5 and a 60-degree conical seat, but exact specifications depend on the specific model, year, and wheel. Always verify with official sources or your dealer, measure what you have, and torque to the manufacturer’s specification to ensure safe, secure wheel mounting.
What size socket for Subaru Outback lug nuts?
A 19mm socket is needed for most modern Subaru Outbacks, which use M12x1.25mm lug nuts. For older models that used 14mm lug nuts, a 21mm socket is required.
- For most recent models (2010-2022 and later): Use a 19mm socket, which fits the M12x1.25mm lug nuts.
- For older models: Use a 21mm socket if the lug nuts are 14mm in diameter.
Will a 22mm socket fit 7/8?
A: 22mm = 0.866", which essentialy is a 7/8" socket. A 7/8" socket will work on a 22mm lug nut, but it can feel a little loose. The other way around, a 22mm can work on a 7/8" lug nut, but it can be really snug, which is not bad.
Are Subaru lug nuts metric or standard?
Yes, almost all Subaru cars use metric bolts. The thread sizes of the lug nuts will vary based on the wheel studs. Therefore, you need metric Subaru lug nuts to fully secure the wheels. For example, the most common metric thread sizes of Subaru bolts are M12x1.
What size lug nuts does Subaru use?
12mm x 1.25
The lug nut size on most Subarus is 12mm x 1.25. This includes models like the Impreza, Legacy, Outback, Forester, Crosstrek, and newer WRX/STi models.
