Enduro A3 30x42x7mm BB30 Bearing

$15.99

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. Grade 5 Chromium Steel Balls
. High precision balls are within 5/1,000,000? Round. These are military level specification, used for precision equipment. R-64 hardness, of the highest grade.
. 52100 High Carbon Chromium Alloy Races
. Vacuum de-gassing process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-5 precision and noiseless movement.
. Graphite/Nylon Ball Retainers
. Nylon with graphite retainers are virtually frictionless while providing constant lubrication.