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