Adjust the steering stops with washers if you're only rubbing at full turn. Spacers require routine maintenance to ensure their safety. They must be retorqued on a regular basis and then the lugs themselves need to be retorqued as well. Otherwise they are probably as safe as anything else. Tho' in some states they are illegal, and most tire shops refuse to touch a vehicle with spacers on it. Do some research in your area.
they are known to work loose. AKA, one or more of your tires passing you!!!!
1977 Cherokee ChiefEdelbrock 1406, 33X12.50, front 1.5 inch shackle lift. AMC 360, th400 Quadra-Trac
2002 wrangler, stock 4.0, auto, 33X12.50 maxis buckshot, AEV Highline Body kit, Ford 9 inch rear end.
Soon to come mods: 4" full traction lift, 4.56 gears, 35X10.50R15 boggers, 35X12.50 cooper st tires, spooled rear end, and much more.
I wound up needing just one washer on the right to keep the left from rubbing. Worked great, took a total of 5 min with letting some loosening stuff sit to help getting the bolt out. And by god I had a free washer sitting on the shelf. It's the only mod I did that I haven't screwed up!!!!!!
__________________ '02 TJ Sport, Dana 44, 5spd, 31" GY DuraTrac's, Spiderweb Shadecage, Zone 2" BB w/Quick Discos