Shimano 105 Octalink Bottom Bracket - BB5500B09
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eBayShimano 105 Octalink Bottom Bracket 68 x 118.5mm 5500 BS Threaded Bike BB
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Shimano 105 Octalink Bottom Bracket 68 x 118.5mm 5500 BS Threaded Bike BBFree delivery in 1–3 days£44.39Visit shop →
Shimano 105 Octalink Cartridge Bottom Bracket BB-5500 68 x 109.5mm, BSA Threaded£3.60 delivery£52.07Visit shop →
Shimano BB5500 105 Bottom BracketFree delivery in 1–3 days£56.99Visit shop →
Shimano BB5500 105 Bottom BracketFree delivery in 1–3 days£56.99Visit shop →
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eBayBicycle Bottom Bracket SHIMANO BSC Octalink BB-5500 70 - 118 mm
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Product Information
Full details
The Shimano 105 Octalink Bottom Bracket (BB5500B09) is an essential drivetrain component designed for serious road cyclists and enthusiasts using Shimano road Octalink cranksets. By utilizing an oversized 22 mm chrome-moly hollow spindle, it provides an excellent balance of reduced weight and enhanced structural rigidity for efficient power transfer. While it offers superior durability and a maintenance-free experience, it is important to note that this specific interface is proprietary and requires compatibility with Octalink-specific cranksets rather than standard square-taper systems.
All features
| Model Part Number | BB5500B09 |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
Is this bottom bracket compatible with square-taper cranksets?
No, this is an Octalink-specific interface and will not fit square-taper cranks.
Does this unit require regular greasing?
No, it is a maintenance-free sealed cartridge design, so it does not require internal greasing or adjustment.
What is the weight of this bottom bracket?
The average weight of the unit is 250 grams.
Can I use this on a mountain bike?
This model is specifically designed for road Octalink cranksets; please verify the specific spindle length and shell width requirements for your frame.
What tools do I need for installation?
You will need a standard splined Shimano bottom bracket tool to install the unit into the frame shell.
Troubleshooting
Clicking or creaking sound while pedaling
Check that the bottom bracket is torqued correctly to specifications and verify that the crank arm bolts are tight.
Spindle feels gritty or has resistance
The cartridge bearings may be worn due to age or contamination; inspect for seal damage and consider a full unit replacement if movement is restricted.
Pros and Cons
Pros
- High structural rigidity for better power transfer
- Maintenance-free sealed cartridge system
- Lightweight hollow spindle design
- Reliable performance for high-mileage road riding
Cons
- Compatible only with Octalink-specific cranksets
- Not interchangeable with standard square-taper cranks
- Limited availability due to newer press-fit standards
Setup, Compatibility & Care
Installation of the BB5500B09 requires specific Shimano splined bottom bracket tools. Ensure the bottom bracket shell threads on your frame are clean and free of debris before threading in the unit. Apply a light layer of bicycle-grade grease to the threads to prevent seizing and potential creaking over time. This unit is designed for use specifically with Octalink road cranksets; attempting to force it onto other systems will damage the spindle splines. For care, avoid using high-pressure water spray directly at the bottom bracket area during cleaning, as this can force contaminants past the internal seals.