Они алюминиевые
Скорее всего не РК их делает, они их продают...
Pro Series Sportbike Wheels are roto-forged aerospace aluminum for strength and weight reduction. The anodized Magnum Grey finish compliments the look of any bike.
Forged and hard anodized aerospace aluminum Carrier Rings are the key components of the Pro Series System that allow you to adapt the wheel to a specific make a model.