What is the difference between Spline lug nuts vs. Acorn lug nuts. Is one better than the other? I am looking at replacing my stock lug nuts due to the thin metal sleeve breaking loose and turning slightly. I know that with the sleeve being loose probably won't hurt anything but its the whole piece of mind thing. If it looks like it is spinning and loose than I will be thinking about it not being tight all the time.

 

Spline nuts do not accept a 6 point or 12 point socket. They should be supplied with a socket, kind of like a key. It's closer to a locking lug with the exception that the splines are spaced evenly and anyone else who has a spline socket, can get them off as well. Sort of like an inverted torx driver.

 

So is one better than the other? Also thanks for your help!

 

Preference? Seems lines are cleaner in appearance. I would be nervous about stripping them personally. Just seems the surface area for the socket to grab is far less than a 6 point lug. MY humble opinion anyway. If you are looking for theft deterrent, go with a locking lug set. Just like a spline but keyed (staggered splines). Cost more if you tried to get the locking lug on every lug on each wheel.