Shimano MTB Press Fit Bottom Bracket - BB-MT800 - 104.5/107 mm
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Leisure Lakes BikesShimano BB-MT800 MTB Press Fit Bottom Bracket with Inner Cover For 104.5/107mm Black
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Shimano BB-MT800 MTB Press Fit Bottom Bracket with Inner Cover For 104.5/107mm BlackFree delivery in 1–3 days£36.99Visit shop →
Product Information
Full details
This Shimano BB-MT800 press-fit bottom bracket is designed for mountain bike riders seeking a durable and quiet solution for their Shimano HollowTech II MTB cranks. Its key benefit is the reduction of frame noise and damage thanks to its fibre-reinforced polymer cups, though users must ensure their frame is compatible with the specific press-fit standard. This assembly includes all necessary cups and seals for a complete installation, offering maintenance-free operation and excellent dirt and water resistance.
All features
| Model Part Number | BB-MT800 |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
What is the main advantage of the fibre-reinforced polymer cups?
The fibre-reinforced polymer cups help reduce the risk of frame noise (creaks) and prevent damage to the bike frame compared to traditional metal cups.
Is this bottom bracket compatible with all mountain bikes?
No, it is only compatible with mountain bike frames that feature a specific press-fit standard measuring 104.5/107 mm shell width with a 41 mm cup diameter. It is not compatible with threaded bottom bracket shells.
Do I need special tools to install this bottom bracket?
Yes, a specialized press-fit bottom bracket installation tool is required to properly and safely install the cups into the frame.
How often does this bottom bracket require maintenance?
This bottom bracket is designed to be maintenance-free due to its sealed cups which protect the bearings from dirt and water.
What is included in the Shimano BB-MT800 set?
The set includes the left and right hand cups, the inner cover, and the inner O-rings.
Can I use this bottom bracket with cranksets other than Shimano HollowTech II MTB cranks?
While designed for Shimano HollowTech II MTB cranks, compatibility with other cranksets may depend on exact spindle dimensions and interface. It is best suited for its intended Shimano application.
Troubleshooting
Creaking or noise from bottom bracket area
Ensure cups are properly pressed into the frame. Check for any debris between the cups and the frame. Verify crankset is correctly installed and tightened.
Stiff rotation or grinding noise
The seals may be compromised or the bearings may be damaged. This bottom bracket is designed to be sealed and not user-serviceable; replacement may be necessary.
Difficulty pressing cups into frame
Confirm the frame's bottom bracket shell dimensions match the specifications (104.5/107 mm, 41 mm cup diameter). Ensure the correct press-fit tools are being used.
Pros and Cons
Pros
- Reduces frame noise and prevents damage
- Durable construction with sealed bearings
- Low maintenance requirements
- Complete set for easy installation
- Reliable performance with Shimano HollowTech II cranks
Cons
- Requires a compatible press-fit frame standard
- Installation may require specialized tools
- Not compatible with threaded bottom bracket shells
Setup, Compatibility & Care
Compatibility: This bottom bracket is compatible with 104.5/107 mm press-fit frames and requires a 41 mm cup diameter. It is designed for use with Shimano HollowTech II MTB cranksets.
Setup: Installation involves pressing the cups into the designated bottom bracket shell of the frame. Ensure the frame shell is clean and free of debris before installation. Specialized press-fit tools are typically required for proper installation to avoid damaging the cups or the frame.
Care: The BB-MT800 is designed to be maintenance-free. The sealed cups protect the bearings from contaminants. Regular cleaning of the bicycle, particularly around the crankset and bottom bracket area, will help maintain its longevity. Avoid high-pressure washing directly at the bottom bracket seals.