Description

MTB Bottom Bracket BSA Threaded 68/73mm for Shimano Hollowtech II – CNC Alloy | Sealed Bearings | Black

Upgrade your drivetrain with this high-quality MTB Bottom Bracket for Shimano Hollowtech II cranksets, designed for smooth performance, durability, and reliable bearing protection in all riding conditions. Featuring CNC-machined aluminium bearing cups, sealed cartridge bearings, and compatibility with standard 68mm and 73mm BSA threaded shells, this bottom bracket is ideal for MTB, trail, enduro, XC, and everyday riding.

Manufactured to fit 24mm Shimano Hollowtech II spindle cranksets, this lightweight and durable bottom bracket provides excellent stiffness and smooth rotation while helping to keep dirt and moisture away from the bearings.

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Key Features

• Designed for Shimano Hollowtech II MTB cranksets
• Fits 68mm & 73mm BSA threaded bottom bracket shells
• 24mm internal diameter
• Durable sealed cartridge bearings
• Lightweight design – only 105g
• Precision CNC-machined aluminium cups
• Includes adaptor ring
• Smooth and reliable performance
• Finished in black
• Supplied in OEM packaging
• Suitable for MTB applications including trail, XC, enduro, and downhill bikes

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Compatibility & Application

This bottom bracket is designed to fit bikes using:

• BSA / British threaded bottom bracket shells
• Shell widths: 68mm or 73mm
• Shimano Hollowtech II style cranksets with a 24mm spindle

Compatible with many Shimano MTB cranksets including:

• Shimano Deore
• Shimano SLX
• Shimano XT
• Shimano XTR
• Shimano Zee
• Shimano Saint

Also compatible with many other 24mm spindle cranksets using the Hollowtech II standard.

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Why Choose This Bottom Bracket?

This MTB bottom bracket offers an excellent balance of durability, low weight, and value. The sealed bearings help reduce maintenance while improving longevity in muddy and wet riding conditions. CNC-machined alloy cups provide improved strength and precise fitment compared to basic plastic alternatives.

Perfect for replacing worn-out bottom brackets or upgrading your existing setup for smoother pedalling performance and improved reliability.

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Why Choose Hopkinson Cycles?

✅ Free UK Postage
✅ Family-Run Independent Bike Shop
✅ Expert Technical Knowledge
✅ Friendly Customer Support From Real Cyclists
✅ Trusted UK Cycling Retailer
✅ Fast Dispatch & Professional Service

At Hopkinson Cycles, we stock a huge range of bicycle bearings, bottom brackets, drivetrain parts, tools, and workshop essentials for MTB, BMX, road, and commuter bikes.

🌐 Hopkinson Cycles
📧 info@hopkinsoncycles.com

📞 01924 274209
📍 Queen Street, Horbury, Wakefield, WF4 6LP