How often are your supposed to re-torque your wheels? I'll give you a hint, it's not one time only after 10 miles. With a new aluminum wheel installation it's normally after 50-100 miles. And that's just for a set of wheels, not even with spacers. For spacers it's not that different, most manufacturers recommend a re-torque after 50-100 miles. They also recommend a thread locker compound. Obviously it's best to follow the specs from the manufacturer you use, but here's a set of installation instructions http://www.ezaccessory.com/Articles.asp?ID=136http://www.ezaccessory.com/Articles.asp?ID=136
I'm sure you don't consider wheels unsafe. But if you re-visit your story and left out the part about the spacers and just said you didn't check your lug nuts you wouldn't be giving up on wheels entirely after a wheel came off would you?
Re-drilling an axle can be completely unsafe too, depending on how its done. And that's the bottom line, you can do anything improperly. Properly installed and torqued spacers aren't unsafe at all. Yours weren't.
