求教大佬关于BBS轮毂改装

看了一些改装案例对BBS 轮毂中毒了
但又细分了RGR什么的，想问下大佬什么是RGR RSGT

[img]https://img.nga.178.com/attachments/mon_202008/03/-7da9Q5-7g5fK2hT1kSdc-a0.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/03/-7da9Q5-7qwhK28T1kSdc-a0.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/03/-7da9Q5-8oftK2aT1kSdc-a0.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/03/-7da9Q5-8fhkK28T1kSdc-a0.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/03/-7da9Q5-8963ZbT1kSdc-a0.jpg.medium.jpg[/img]