I was a bit worried after reading other reviews. I'm not sure why previous reviews are conflicting. The pair I received seemed to be very durable, the studs were unpainted and of high quality so didn't look like they would wear out. Installed on the back of my E46 M3 after getting some good details on the rear wheels. The hubs were cleaned to ensure the fit was perfect and the spacer was also measured and it was very consistent all around and across the hub diameter. Perfect fit, had to tap with a rubber mallet but that's better than sloppy with space. I rode spiritedly and felt good with no new hesitation or fickleness. Will go back later and see if anything changes. Seems to be a great product for the money!