CeramicSpeed Pulley Wheels Shimano XT/XTR 12-Speed - 14 Tooth Alloy BLK MFPN=00.7018.401.001 }Bosch Performance Line CX Drive

}Bosch Performance Line CX Drive Unit - 20 mph with Mounting Plate smart system BDU3741 the smart system Compatible

The Maxle Stealth offers a light low profile tooled alternative to Maxle Lite

The die-cut borderless decals provide a distinctive look to go with the distinctive sound and aero-advantage of Zipp wheels rolling at 45km an hour

Lightweight and breathable

Secure non-slip engagement

CeramicSpeed Pulley Wheels Shimano XT/XTR 12-Speed - 14 Tooth Alloy BLK MFPN=00.7018.401.001 }Bosch Performance Line CX DriveCeramicSpeed Pulley Wheels for Shimano XT XTR 12 Speed 14 Tooth Alloy Black. CeramicSpeed pulley wheels reduce friction last 3 5 time longer than stock high end pulleys and are designed to work with less drag. Premium Grade 3 Silicon Nitride Ceramic balls Hand built in Denmark TECH SPECS Drivetrain Speeds 12 Fits Brand Shimano