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Kcnc BB30 Adapter Bottom Brackets

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Product Description

The BB30 bottom bracket by KCNC is an ellegant and innexpensive aftermarket option for those using cranks with a 24 mm spindle, such as Shimano's Hollowtech II and FSA's Gossamer crankset. Each bottom bracket comes with 2 extra plastic bearing caps in case one or both are damaged during a drivetrain clean or crank swap.


The KCNC BB30 bottom bracket for road is compatible with 68 mm shells when using a 24 mm crank spindle, while the mountain version is compatible with both 73 and 68 mm shells. Please purchase accordingly.


To properly tighten these threaded bearing cups, two Hollowtech II compatible tools will be required. KCNC recommends tightening the cups to 35 ft-lbs of torque. This design uses a compressible o-ring on the non-drive side cup to compensate for bottom bracket width discrepancies.

Product Specifications

Weight118 grams
Bearing Size6805 (2)
Mountain73/68 mm
Road68 mm
Spindle Diameter24 mm

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