CeramicSpeed OSPW Pulley Wheel System Shimano 9000/6800 Series - Alloy Pulley Carbon Cage BLK MFPN=BB19BSA8330 the helmet vents warm air

the helmet vents warm air

Includes Composite Matrix frame mount

Color Black Ring Position/Type Outer Tooth Count 46 Drivetrain Speeds 9 Chainring BCD 110 Material Aluminum Defined Color Black

while bigger S-Sizes deliver more stability and a roomier ride

} Constructed from tough sonically welded and seam sealed waterproof material

CeramicSpeed OSPW Pulley Wheel System Shimano 9000/6800 Series - Alloy Pulley Carbon Cage BLK MFPN=BB19BSA8330 the helmet vents warm airCeramicSpeed OSPW Pulley Wheel System for Shimano 9000 6800 Series Alloy Pulley Carbon Cage Black. The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Features two oversized 17 tooth aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light