OS B2101 .21 Engine Bearing Kit – Steel & Ceramic Options

OS B2101 .21 Engine Bearing Kit. This is a rear bearing sized 14×25.4x6mm and front bearing size 7x19x6mm. Select your Bearing type from Standard (Steel) or Ceramic in the drop down box above.
MX Series Ceramic Bearings are a new design of engine bearing with an Offset Internal Track for greater load capabilities, a stronger, thicker PA46 Retainer for greater resistance to high nitro content fuel. Grade 5 Ceramic Balls for closer tolerance and longer life.Ceramic balls are lighter for less centrifugal force allowing Engines to spin at a higher RPM and to accelerate faster.