They're rubber sealed ball bearings, that provide smooth rotation, great accuracy of attachment and also simplified maintenance.
• 1280 Sealed Ball Bearings x2
• Applications include TT-02 framework front/rear differential gears and F104 chassis ball differential.
• utilizing ball bearings as opposed to synthetic and metal bearings offers better rotation and better parts setup.
• These ball bearings use blue rubber seals as opposed to metal ones – this allows you to start the bearings to wash and work with them. Blue rubber seals also vastly help in the prevention of debris going into the battle roller.
• Low-viscosity oil is used to lubricate the internal workings.
• sporadically perform upkeep including incorporating oil; after crashes, checking bearing movement is advised.