SKU # 60413 HIGH QUALITY DYNA-SYS 10-SPEED CASSETTE CLOSE RATIO GEARING ALLOWS A MORE EFFICIENT USE OF ENERGY THROUGH FINER CADENCE CONTROL SPROCKETS ARE CUT AWAY AND DRILLED TO REDUCE WEIGHT WITHOUT REDUCING RIGIDITY NICKEL-PLATED FINISH OFFERS HARD WEARING RESISTANCE TO CORROSION CORROSION-RESISTANT STEEL CASSETTE LOCKRING FOR 10-SPEED HG-X MTB CHAINS