9 average score from 49 reviews

RollerBoys Ceramic 12T sr

Model number: BDP-20
  • 12x12T Ceramic derailleur pulleys
  • High-performance composite material from EMS Swiss with 40% glass-fiber blend
  • Sealed bearings with aluminium cover for optimal durability
  • Specially lubricated with ceramic oil for lower resistance
  • Compatible with 12-speed SRAM road groupsets
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RollerBoys Ceramic Derailleur Pulleys

RollerBoys, the 12x12T Ceramic 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, lubricated with ceramic oil for lower resistance and 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.


  • Pulley size 12T
  • Bearings material Ceramic
  • Gears 12-speed
  • Compatible with brands SRAM
  • Compatible with Sram 12 speed
  • Part materials Grivory EMS
  • Narrow wide Tension pulley only