No wheel spacers. I’ve had these Rock Warriors on my Sequoia for 3 or more years without issue. But I will admit, when I first bought these wheels I heard there was a tight fit. But luckily I haven’t experienced any mishaps. Knock on wood.Did you end up running wheel spacers with the rockwarrior wheels? My rear UPC arm contacted the stick on weights. I'm going to try hammer weights, but am concerned about the lack of clearance.