Quote:
Originally Posted by jamal
Rule of thumb is to have 1 full diameter of thread engagement to reach the full strength of a fastener. The lugs are M12x1.25, that means to thread a lug nut on by 12mm you actually want over 9 (12/1.25=9.6) turns of thread. Going down to 7 turns then you are maybe only at 70-75% of full strength.
Eibach has spacers that include longer studs. ARP makes wheel studs in about stock length, 2in, 2.5in, and 3in. So if you are going to use spacers you should really just get longer studs, and possibly open ended nuts to go with them. Then you don't have to worry about it. You can swap to a bigger spacer if you need to because of different suspension/tires/alignment.
I mean, yeah, people put spacers on anyway with less than ideal thread engagement. There is some margin of safety there. But do you want your wheels to fall off when driving?
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Actually the reason Im so concerned is because in a previous car my wheel did fall off. Im even skeptical of the spacers that bolt down to the car and then have their own studs on the spacer. I think the best way to go would be spacers with longer studs. Only thing is that Im looking for both hub centric and wheel centric versions. what do you think of these??
http://www.ft86speedfactory.com/isc-...l#.WJEaZ_krKUk
http://www.ft86speedfactory.com/h-r-...l#.WJEanvkrKUk