Had all those feeling too, when I first was considering spacers on our JKU Wrangler.
After running them on our wrangler since 2012 and 100,000 plus miles I no longer worry.
But like anything, do your research, talk with others that are using the product. And don't cheap out, buy a quality product.
I now have 66,000 plus mile on my compass trailhawk, The spacers have been on for about 35,000 miles and I have had no issues at all with them.
Vehicle sure feels more stable in crosswinds and when pulling my trailer. Maybe a placebo effect, but I don't think so.
Spending time learning the science of the mechanisms of friction, lubrication, and wear of interacting surfaces that are in relative motion
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