Are wheel adapters/ spacers safe?

[jsbihn]

Hey all
I am looking to put a 1-2 inch wheel adapter/spacer on my stock wheels. I figured with a 3 inch key/spacer lift and 38 x 14.5 x 17 that I would need them to clear the suspension. (please tell me if I am wrong).
These adapters are the kind that you bolt to the oem hubs and they have their own studs you would bolt the wheel to

So...
My question is are they safe?
I have heard that some have done them, and others wont.
I would like to heard from both please.
I am not really a hard core off roader so, are they safe? Do they make hubs or parts wear faster?
I will also be doing an alignment after they are done, and most of the suspension and steering components have been replaced with Moog as of this and last weekend

What do you think?

[ryaleon]

In my experience no. Not very safe. My brother had them on his f250 with 37x13.5s and one broke off while he was cruising at 70 mph

[Stellar]

I've ran spacers on my H2, Dodge diesel, and TJ wangler specifically built for rock crawling for over a decade with no issues. The spacers will make hubs wear faster, but are generally stronger than the hub themselves. Hubs and steering components on the deuce should be checked regularly anyhow as the stock steering set up is weak / garbage.