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YBN MK12e 12 Speed Flattop Chain Gold bikesportz Whether it’s descending the steep Shimano Whether it’s descending the steep and technical grades at the Crusher in the Tushar the Shimano Dura Ace FC R9100 11 Speed Crankset drops weight while maximizing power transfer The MK12 E offers the proven efficiency advantage of YBN’s SLA coating—around 40 % lower drivetrain losses compared to SRAM Flat Top chains (CeramicSpeed testing)—while maintaining excellent wear resistance and reinforced riveting
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