ABI Ceramic Bearing Kit Outboard Bbs
Grade 3 Silicon Nitride ceramic balls, graphite/nylon retainers. Ceramic bearings provide superior smoothness, reduced weight and extended bearing life. Kit includes correct BB bearings to upgrade stock bearings. AB-9821: outboard BB kit includes 2 each 6805 ceramic bearings and will replace Shimano Dura Ace and Ultegra outboard bottom bracket bearings. AB-9824: 2 each of the ceramic bearings.
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