This is the Traxxas TRX .12 and .15 Engine Stock Replacement One-Way Bearing. This bearing is located on the starter shaft.
FeaturesSteel constructionRoller bearing design
IncludesOne One-Way Bearing
RequiresNothing. This is a direct replacement part
SpecsInner bearing diameter: 6mm (0.24")
CommentsThis bearing is unique to this engine, and cannot be substituted by another bearing