What size are the lug nuts on a RSX?
The Acura RSX, produced from 2002 to 2006, generally uses five lug nuts with a thread size of M12x1.5, a 60-degree conical seat, and a 19mm wrench for installation. The standard bolt pattern is 5x114.3 mm, with typical torque around 80 ft-lbs, though exact specs can vary if aftermarket wheels are installed.
Standard lug nut specs for RSX OEM wheels
These are the baseline specs you’ll need for stock or OEM-equivalent replacements.
- Thread size (stud): M12 x 1.5
- Seat type: 60-degree conical (lug nut seat matches wheel hole seating)
- Hex size for installation/removal: 19 mm (3/4 inch)
- Bolt pattern: 5 x 114.3 mm
- Recommended torque: about 80 ft-lbs (108 Nm), depending on the wheel and hub assembly
These specifications cover the typical RSX configuration and are valid for most stock wheels from 2002–2006. Always confirm your exact wheel spec if you’re replacing wheels.
Considerations for aftermarket wheels
When stepping away from OEM wheels, lug nut requirements can change. Here are common variations you may encounter.
- Thread pitch and size: Most RSX aftermarket setups still use M12 x 1.5, but some wheels may require M12 x 1.25 or other pitches. Verify with the wheel or lug nut manufacturer.
- Seat type: OEM uses 60-degree conical seats; some aftermarket wheels use different seats (e.g., ball or flat seats) that require specially matched lug nuts.
- Head/hex size: OEM-style lug nuts typically use a 19 mm socket, but some aftermarket lug nuts use 17 mm, 21 mm, or alternative designs. Confirm the correct tool size to avoid damaging nuts or studs.
- Head configurations: Some aftermarket lug nuts are closed-end or splined; ensure compatibility with your wheels and brake caliper clearance.
With aftermarket wheels, mis-matched lug nuts can compromise safety and wheel retention. Always confirm compatibility before purchase and installation.
How to verify your RSX lug nut size
Use these steps to verify the correct lug nuts for your RSX, whether you’re sticking with stock wheels or adding new ones.
- Check the owner's manual or service manual for the torque specification and lug nut size for your specific RSX model year.
- Consult the wheel manufacturer’s specifications for seat type, pitch, and recommended lug nut type for your wheels.
- Inspect the current lug nuts or studs: measure thread pitch (with a thread gauge) and observe the seat shape on the wheel.
- When installing new lug nuts, use a calibrated torque wrench and tighten to the recommended torque. Re-torque after 50–100 miles as recommended in many maintenance guides.
Following these steps helps ensure you have the correct lug nuts and torque settings for safe wheel installation.
Summary
- The RSX typically uses M12x1.5 lug nuts with a 60-degree conical seat.
- Hex size for installation is typically 19 mm.
- Wheel bolt pattern is 5x114.3 mm; OEM torque is around 80 ft-lbs, depending on wheel and hub specifics.
- Always verify compatibility with aftermarket wheels and consult manufacturer specs to ensure the correct thread pitch, seat type, and hex size.
