RollerBoys, the 12x12T CrMo derailleur pulleys. Crafted from a high-performance composite material by EMS Swiss, they feature a 40% glass-fibre blend. This makes our RollerBoys durable and efficient. With sealed bearings protected by an aluminium cover, these pulleys guarantee optimal long-term performance. RollerBoys seamlessly integrate with 12-speed SRAM road groupsets, ensuring a smooth and precise cycling experience.
