They truly are rubber sealed ball bearings, offering smooth rotation, great precision of accessory and simplified maintenance. • 730 Sealed Ball Bearings x2 • Applications have M-chassis gearbox area. • making use of ball bearings in the place of synthetic and metal bearings provides better rotation and better elements setup. • These ball bearings use blue plastic seals as opposed to metal people – this permits you to begin the bearings to completely neat and concentrate for them. Blue synthetic seals additionally greatly assist in preventing debris entering the competition roller. • Low-viscosity oil is employed to lubricate the inner workings. • sporadically perform upkeep such as including oil; after crashes, checking bearing motion is preferred.