Bikone DCTech BB30-73a asymmetric - Steel bearings - Shimano

Bikone DCTech BB30-73a bottom bracket (⌀42mm - Width 73mm) Asymmetric Pressfit with steel bearings - Shimano standard (⌀24mm)

The Bikone DCTech BB30-73a asymmetric bottom bracket with steel bearings Shimano is designed to deliver smooth, reliable, and quiet power transfer, even under the most demanding conditions. Developed for 73mm wide Pressfit BB30a frames, it's aimed at cyclists seeking a high-end solution that combines stiffness, precise alignment, and durability.

Thanks to Dual Cup Technology (DC Tech), the two aluminum cups are perfectly aligned to create a rigid central core that eliminates play, creaking, and loss of efficiency. Combined with high-precision Chronium steel bearings, this bottom bracket ensures smooth and consistent rotation, mile after mile.

Box contents

• BB30-73a bottom bracket for Shimano cranksets (24mm axle)

Compatibility and assembly

• Bottom bracket axle diameter: 24 mm ( Shimano road)
• Frame bottom bracket width: 73 mm
• Internal frame diameter: 42 mm
• Standard: BB30a
• Frame type: Pressfit

Technology and design

• Dual Cup Technology: two aluminum cups perfectly align the bearings on both sides to create a rigid assembly, free from noise and unwanted movement
• Chromium steel bearings ABEC5 / P5 – 2RS for smooth and durable rotation
• Machined cups made from aircraft-grade 6061 aluminum with T6 heat treatment for high rigidity and excellent corrosion resistance
• Complete sealing thanks to axial seals and total surface protection

Spare parts compatibility

• 30407 steel bearing
• PF46, PF30, T47, EVO, BBright and T45 adapters for Shimano

Compatible bicycles

• Cannondale Synapse (2018 to 2021)
• Cannondale CAAD13 (2019 to 2022)
• Cannondale SystemSix (2018 to 2021)

It is recommended to check the compatibility between your frame and this bottom bracket before purchasing.

Weight

106 g

Guarantee

• Lifetime warranty on toilet bowls
• 3-year warranty on bearings