On Tuesday, September 06, 2011 8:46 PM, "Carl Denk"  wrote:
> Were the lug bolts furnished with the wheels? If not the lugs and=20
> wheel's mating surfaces may not have the same contour? i.e. conical=20
> angle, spherical radius, etc.
> > I swap tires around on my Miata a couple of times a month, so I don't
> > have any problems with corrosion. But the studs and nuts would wear out
> > from all that action if they were dry. I put a little antiseize on mayb=
e
> > once a year. At recommended torque I find that a lug here or there will
> > loosen up sometimes, but they are not the factory wheels or lugs, so th=
e
> > recommended torque is just a number. I find I must go five pounds over
> > for them to stay tight.

They are both conical, and when I bought the wheels I asked for matching
nuts, and they do.

Chances are it's just that you really should re-torque after a few hours
of driving. But when I put on my sticky tires I want the wheels to stay
on all day, so I go five pounds over. Since I've been doing that I have
never had any motion when I re-torque.

And that may explain why tire shops regularly overtighten - they don't
want a nut to come loose and they don't care if they warp a rotor/drum.

Cheerful regards,

Bob

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