The 3RACING Double Rubber Seals Bearing 4x10x4 mm is intended for hobby racers seeking simple, sealed components that reduce contamination variables. Sold as a two piece set, these bearings suit precise small-scale applications where reliable spin is part of setup consistency.
Dual rubber seals limit ingress of dust and fine debris, reducing maintenance variance between runs. For competitive use inspect seals routinely and replace bearings when any degradation affects lap-to-lap performance.
These 4x10x4 mm bearings are appropriate for wheel hubs, small gearbox outputs, and other tight assemblies common in race-spec models. Confirm bore and journal dimensions before installation and use proper drivers to avoid race damage.