Aided by the release of the F-05 Front Multi-Roller product (15808), DR-EVO Multi-Mount Rear Body (15341) and DR 11mm Aluminum Passing Roller w/ integrated Ball Bearing (15342) the number of ball bearing related choice components for Dangun Racers have actually increased quickly. To offer more ball bearing choices, Tamiya now releases 2 types of ball bearings especially for Dangun Racers. Each set includes 2 bearings.