The XRAY 940508 High-Speed Ball-Bearings are 5x8x2.5mm sealed units supplied as a pair, designed to reduce drivetrain friction and add durability to your RC setup. They work well across a range of chassis types.
With a greater number of larger balls inside the cage, these bearings spread load more evenly and keep rolling resistance down at high RPM. The rubber seals help exclude dirt to preserve the internal races and balls.
The removable side covers make cleaning straightforward. Keep bearings free of grit and apply a light bearing oil like AeroShell Fluid 12 for best balance of speed and protection.
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