As the drivetrain war heats up, the big-name component companies are pulling out all the stops. Shimano takes mountain bike drivetrains to the next level with SLX Dyna-Sys 10 speed. The SLX Dyna-Sys FC-M66010 Triple Crankset is an integral part of the new component group. The Shimano 10 speed mountain chain, which is the first of its kind, is narrower than previous mountain chains. The SLX triple has tighter spacing to accommodate this narrow chain, which makes shifting tighter and cleaner.
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