Combined with launch of the F-05 Front Multi-Roller unit (15808), DR-EVO Multi-Mount straight back Body (15341) and DR 11mm Aluminum Passing Roller w/ integrated Ball Bearing (15342) just how many ball bearing related option elements for Dangun Racers have in fact actually increased rapidly. To be able to offer more ball bearing alternatives, Tamiya now releases 2 kinds of ball bearings especially for Dangun Racers. Each set includes 2 bearings.