[ColoradoTJ]

Funny I haven't seen any "I have xxx miles on my spacers without failure."

Wheel spacers will and do put extra stress on your ball joints & wheel bearings. I had 1.25" spidertrax on a couple setups and they will. To be fair, your not using your Truck like I do my Jeep unless you are towing.

There have been plenty of issues with spacers...just read around, not just here. I ran them for offroad use only. Lost my scrub radius, so steering sucked ass.

Don't get me wrong, this isn't going to happen overnight, but will happen.

 

[ColoradoTJ]

Oh run them, by all means. I would again if I bought good quality spacers/adapters, torque to the proper settings and use the Red thread sealant.
When people have issues with them:
-cheap knock offs
-improper installation
-Overloading (which your factory lugs could snap off too. I have seen 8 lug wheels come off)
-bent studs (I had this happen on all my wheel spacers)

I also had some pretty good mileage on my unit bearings and ball joints before they failed (100K+ on unit bearings). Not bad for a rock crawler...