1. Of the four discs ordered, one came crooked, I had to re-order with a margin of one disc and wait 3 days, and tomorrow they promise snow and ice, and you are on summer tires. Upon the arrival of new discs, it turned out that out of the two ordered ones, the previous one came from which I refused, and the new one was also not quite smooth, but I had to put it nowhere. Total in fact: 3 disks at the first balancing gave out 0/0, and the new reordered 0/+15. Tires new Bridgestone Blizzak Ice 16". 2. Due to the fact that the disc rim is thin, the standard valve (nipple) with a height of 38mm looks too big on the disc, you should look for something smaller. But who pays attention to him? It doesn’t cling to the asphalt, it doesn’t get out of the wheel profile, and that’s good, I didn’t find less. Be sure when buying these discs and from this manufacturer in general, require checking the geometry of the disc on a balancing machine! Otherwise, if after tire fitting, when balancing the wheel, it turns out that the disk is crooked, then the manufacturer does not accept quality claims and the store may not accept the disk back if it was not he who did the tire fitting. Thank you all and good luck on the road!