Utilizing the launch of the F-05 Front Multi-Roller product (15808), DR-EVO Multi-Mount Rear Body (15341) and DR 11mm Aluminum Passing Roller w/ Built-In Ball Bearing (15342) the amount of ball bearing related option components for Dangun Racers have increased quickly. To be able to offer more ball bearing options, Tamiya now releases 2 kinds of ball bearings especially for Dangun Racers. Each set is sold with 2 bearings.