Quote:
Originally Posted by fstlane
It's simple math that you can do without even removing your wheels. With your wheel on, put a lug nut on the recommended number of safe turns (8 for 12x1.25), and then count how many extra turns you get till the nut is all torqued down. Then multiply the number of extra turns by the thread pitch, 1.25mm.
For example, if you turn your lug nut 8 times, and then it turned an extra 4 times till it was snugged and torqued, you could safely use a (4 turns) x (1.25mm per turn) = 5mm spacer and still have 8 turns when it was installed.
That said, I came up with about a 4mm spacer thickness measurement with my Rota Titan wheels running stock length studs.
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I would like to see your source for this calculation. From what I see is you are determining the number of threads needed to obtain proper torque on the nut and stud.
I like to keep it simple and look at two things: 1) proper torque 2) adequate # of threads engaged to support the rated load without shearing.
My recommendation to anyone reading this thread is to
1) torque the lug nuts to factory settings
2) measure the diameter of the stud, and make sure there is equal to our more than that diameter in depth between the end of the stuff and the wheel.
I can provide the source to the recommended bolting practice if needed, or just trust a design engineer at a nuclear powerplant. I honestly would love to spread any knowledge I can on to those curious.