b1zbaz wrote:What does that mean
Spines are small ridges cut around the outside of the wheel stud, below the threaded area of the stud, corresponding ridges are cut inside the stud hole in the hub. When the studs are pressed in to the hub they don't turn when you tighten up the wheel nut, as the splines interlock. I think Stuart may be called upon to provide a picture.
Some people re-drill the hubs with a new PCD (pitch circle diameter) in order to fit alternate wheels. Then they weld the new studs in place as you need special machine tools in order to cut internal and external splines. Welding studs in place may not be a good idea as the wheel-studs I believe are heat treated to give them strength, welding will destroy the heat treatment of the stud, you are also probably welding dissimilar metals: I.E. a cast iron or steel hub and a steel wheel stud.
You pays your money and take a chance!
Just my twopenny worth
Alan