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Product DescriptionMR2437-2RS Enduro Bike Bearing.
Enduros ABEC 5 bearings offer better performance than the ABEC 3 range. This is achieved by using the very best military level, high precision HRC-64 hardened Grade 5 Chromium Steel Balls, and 52100 High-Carbon Chromium-Alloy mirror polished ball races. The Graphite and Nylon ball retainers allow virtually friction-less movement and provide constant lubrication to maximize the bearing span.