I did a google search of "wheel spacers and wheel bearing failure" and a whole bunch of sites turned up, including a number of car/truck forums. People owning Jeeps, Hondas, Miatas, Subarus and other makes/models have weighed in on the topic. There are arguments based on physics and leverage principles that suggest the addition of spacers may cause the wheel bearings to wear unevenly, possibly contributing to premature failure. There are cases in which owners evidently have experienced this problem, but an equal number of postings suggest there is no basis to the argument. Anyway, it makes for interesting reading, but doesn't address the question of whether or not it's an issue for the 370Z. Hence the reason I asked.
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