Originally Posted by
GravelMN
I do this and slip a stack of dimes underneath to measure to the locknut (or the axle if you are sure it is perfectly centered). When you get to less than the thickness of a dime difference from one side to the other, life is good.
If I use this method, I was planning to use a QR skewer. The wheel in question is a rear wheel, so I am hoping a front skewer with nut will do the job.