Deep Groove Raceways: Balls roll deep in raceway channels - reduces side impact damage & breakage Straight Edge Frictionless Shields: Pop off resistant - holds oil in, dirt and moisture out- easy to clean Micro Groove Raceway Surfaces: Linear micro-groove surfaces improve bearing lubrication, speed and spin Max Impact Cage Design: Non-distortion custom cage keeps the balls precision spaced & oil circulating Balls Out Technology: Eliminates shield and cage contact on impact for a go fast, stay fast bearing High Speed Ceramic Oil: Nano-ceramic compounds for wear protection - moisture, rust, corrosion resistant Factory Fresh Quality: Nitrogen filled shrink wrap, reduces metal & oil oxidation until ready to be ridden