CeramicSpeed OSPW RS Alpha Pulley Wheel System Shimano Dura-Ace 9250/Ultegra 8150 - ALPHA Aluminum Pulley Carbon Cage Silver Roller transport bag }RockShox Rear Shock Damper Shaft RockShox Reba SIDB Solo

CeramicSpeed OSPW RS Alpha Pulley Wheel System Shimano Dura Ace 9250 Ultegra 8150 ALPHA Aluminum Pulley Carbon Cage Silver Roller transport bag }RockShox Rear Shock Damper Shaft RockShox Reba SIDB Solo }RockShox Rear Shock Damper Shaft Assembly SIDLuxe 47 model Thumb Shifter speed 3sp friction front rear front weight 87g color black The CeramicSpeed OSPW RS Alpha System continues the tradition of providing optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design Grade 3 Silicon Nitride ball bearings are 400% smoother 128% harder and 58% lighter than standard steel balls normally used in the bicycle industry