For most Honda CRX models, the lug nuts use a metric M12 x 1.5 thread with a 4x100 bolt pattern, and they are typically tightened/removed with a 19 mm socket. Verify this for your specific year and wheel setup.
Core specifications
These specifications cover what you’re most likely to encounter on factory CRX wheels. Variations can occur with aftermarket wheels or regional production changes.
- Thread size: M12 x 1.5
- Bolt pattern: 4x100
- Seat type: conical (acorn) seat
- Outer hex size: typically 19 mm
In practice, this combination—M12x1.5 threads, 4x100 pattern, conical seat, and a 19 mm wrench—covers the majority of Honda CRX models from the 1983–1991 range. Always confirm with your vehicle’s manual or by inspecting the lug nuts on your car if you’re unsure.
Year-by-year notes
First generation CRX (1983–1987)
Most 1983–1987 CRX models use the standard 4x100 bolt pattern with M12x1.5 lug threads and conical-seat lug nuts. The common wrench size remains around 19 mm, but there can be minor year-specific variations depending on trim and regional production.
Second generation CRX (1988–1991)
The 1988–1991 CRX continues with the 4x100 pattern and M12x1.5 lug threads in most markets. As with older cars, verify the exact lug nut type and socket size if your wheels were swapped or if aftermarket hardware is installed.
How to verify on your car
Follow these steps to confirm the lug nut size for your exact vehicle and wheel setup:
- Inspect the lug nuts that are currently installed on your wheels and note the nut shape and socket size you need.
- Measure the thread size using a thread gauge or compare against a known M12 x 1.5 nut if you have one handy.
- Confirm the bolt pattern on the wheel hub, which for a CRX is typically 4x100.
- Check the service manual or OEM parts catalog for your year to verify seat type and recommended torque.
Using the correct lug nut size is important for safety and wheel retention. If you’re unsure, bring a lug nut to a parts store to match it, or consult the factory manual for your exact year and trim.
Summary
Across most Honda CRX models from the 1983–1991 range, lug nuts are M12 x 1.5 with a 4x100 bolt pattern, conical seat, and a typical 19 mm wrench size. Always verify against your specific year and any aftermarket wheel changes, and follow the manufacturer’s torque specifications when tightening.