Spidertrax are not actually simple spacers, they're wheel adapters. they don't just sit loosely sandwiched between hub and wheel. they actually bolt onto the hub and are made of high quality parts machined with precision.
if you have an aftermarket wheel, don't get one that requires wheel spacers. it's a wtf move.
unlike the escalades of this world where OEM wheels look whack, since we're talking trucks and big fat tires, OEM wheels serve most just fine from the side profile.
i tried to run without spacers with my 18" Limited wheels. the stance looked horrible (RV like). i immediately ordered the spidertrax and have not had a problem with them and they absolutely transformed the look of the truck.
it's such a big aesthetic deal to me that i wouldn't lift if i wasn't allowed to run the wheel adapters.
people will argue that wheel bearings will wear out quicker... tough to say as there is ZERO evidence proving causation. it's the same deal if you're running aftermarket wheels that sit pushed out further toward the fenders.
just get that good look and enjoy the drive. when stuff goes bad, just replace it. cars are mechanical things that aren't built to last forever. some just last longer than others.