blackbox ceramic bearing pulleys mtnBlackBox Ceramic Bearing Pulleys MTN are an advanced upgrade for any mountain biker seeking maximum efficiency and durability in their drivetrain. Using ceramic bearings , the pulleys significantly reduce friction, increase stiffness, and reduce weight, resulting in smoother shifts and longer life . A 10ml syringe of grease optimized for low friction and maximum durability is included. Product features: Type: Ceramic bearing pots Intended use:
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