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Originally Posted by AtomicLabMonkey
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Originally Posted by Dean
I actually had loose lug nuts, as well as riding in a Student's car at Sears Point with them. They are not a big thing to worry about, especially on cars with hubcentric wheels like the Subys as they give a ton of warning.
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:shock: I have to disagree there, untorqued lugnuts are a good way to break the wheel studs and have a wheel go flying at speed. Lugnuts have a high torque value for a good reason (and the reason is not to just keep them from loosening) - that high torque value imparts a preload on the studs, and consequently a clamping (frictional) force between the flat surfaces of the wheel, rotor and hub. That clamping force is what resists all the static & dynamic wheel loads, rather than the studs alone supporting the outside loadings as simple shear pins; if the clamping force isn't there, the studs are going to take a cyclical beating every time the wheel goes around and stand a good chance of failing from fatigue. |
While I agree as to there function, on a hubcentric wheel, the hubcenter can absorb much of the load from a loose wheel. Yes, if Gary had loose lugs, he might well snap them in a lap, but it is far more likely that he would feel the issue in the wheel long before they snapped off IMHO. Cars with non-hubcentric wheels are much more susceptible to stud brakage in just about every situation I can think of.
Yes, they use very strong studs, but even NASCAR cars don't snap studs often and they leave lug bolts loose all the time, and aren't hubcentric.
I stand by my assertion that you will have plenty of warning before a wheel flys off.