Hey guys, recently we have a customer complained about a broken spacer hub ring, so we have studied this case, it seems most likely the car hub has a very different sizespec from the stock hub. And our hub centric spacers are built to fit the stock hubs. Therefore, we suggest the new customers, if your hub is aftermarket, please contact us for assistance before you make the purchase. The cars with the stock hubs, no worries, the spacer will fit your hub perfectly. And, we suggest the customer who has already bought the spacer, and has an aftermarket hub, please check your spacer to see if there is any damages on the hub ring, especially the 15mm spacers. Meanwhile, we will develop a new model for the commodores with an aftermarket hubs. Tks for your attention.