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The XX1 derailleur's pulleys use 12 teeth, rather than 11; this helps to increase the derailleur's chain capacity. SRAM also included a pulley wheel, which guides the cable into the derailleur.
The XX1 derailleur's pulleys use 12 teeth, rather than 11; this helps to increase the derailleur's chain capacity. SRAM also included a pulley wheel, which guides the cable into the derailleur.
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