* Designed to bridge the gap between the 40-series and the 110-series* Internally countroured and relieved to minimize weight and maximize strength* Low-friction upper bearing seal completely seals cup from contaminants and is fully captured by the top cover with no loose parts* Dual-seal crown race provides excellent seal efficiency with low friction* Carbon friendly captured compression ring* Premium, sealed stainless-steel Hellbender bearings* Interlok spacer cmpatible * Bright – dip anodized