Symptoms
- Nut feels gritty or uneven when turning
- Nut won't sit flush against the wheel
- Wheel wobbles slightly even after tightening
- Difficulty starting the nut by hand
Likely causes
- CommonNut started at an angle on the studThis happens easily if the nut isn't started by hand before using a wrench.
- PossibleDamaged threads on the stud or nutPrevious cross-threading or corrosion can damage the threads permanently.
What to do
- Stop turning the nut immediately if it feels gritty or uneven; forcing it can ruin the stud.
- Back the nut off completely by hand.
- Inspect both the stud and nut threads for visible damage or debris.
- Clean the stud threads with a wire brush if dirty, then restart the nut by hand, turning it several full turns before using a wrench.
- If it still won't thread smoothly, the stud may be bent or damaged and should be replaced by a mechanic.
- Never drive on a wheel with a cross-threaded or loose lug nut.
Tools and parts
- Wire brush
- Lug wrench
Replacement wheel studSearch: “wheel stud for [your car model]”
When to call a pro
If the stud is bent or the threads are damaged beyond hand-cleaning, have a mechanic replace the wheel stud before driving.
Safety
Use caution
Do not drive on a wheel where a lug nut won't thread on properly; a loose wheel can come off while driving.