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SystemSix and Slice
Shimano 12-speed Ultegra/XT (fits all Shimano road and MTB 12-speed drivetrains)
This bottom bracket is compatible with a variety of bikes and comes with sealed options to suit your riding style
Upgrade to the fastest Kolossos ever designed for Shimano 105 systems and experience a drivetrain that’s built for pure speed
Typically the chain stay hole on steel and titanium frames
Custom Cerakote Pulleys BOLTS SystemSix and Slice
