9.3 average score from 28 reviews

RollerBoys 11T-13T

Model number: BDP-08
  • 11x13T CrMo derailleur pulleys
  • Composite material provided by EMS Swiss, with 40% glass-fiber mixture
  • Sealed bearings with aluminium cover for optimal durability
  • Compatible with 11-speed Shimano GRX (810/815)
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RollerBoys Derailleur Pulleys

The RollerBoys will make your bike ride so smooth that you will never stop anymore! The composite material is strong and durable and the special teeth pattern makes sure you can shift to a higher gear with the speed of light! High-quality pulley wheels are a must-have for every serious bike rider, with the RollerBoys you are good to go!

RollerBoys 11T-13T RollerBoys 11T-13T


  • Pulley size 11/13T
  • Bearings material CrMo
  • Gears 11-speed
  • Compatible with brands Shimano
  • Part materials Grivory EMS
  • Narrow wide No


  • Weight (g) 27