JK Wheel Spacers
#11
I have a 2009 JKUR, I've run bolt-on spacers for over 95,000 miles and 4 sets of tires up to 35's with no issues. Use red lok-tite when you install them and, barring some structure issue in the aluminum, or poor machining of the spacers you are good to go. I have never torque checked my spacer since I installed them almost 5 years ago. The reason for not torque checking them, as some have suggested, is to keep the integrity of the lok-tite.
#12
You don't actually re-torque them, you just check the torque. Mine have never budged.