Bottom bracket built to deliver smooth, reliable pedalling for road and mountain bikes. Easy-to-fit design and sealed components give riders confidence on long rides and muddy trails with kefeimumu Bike Bottom Bracket. Does the BB match your frame and crank specifications?
⚡ At a Glance
- • Durability: High-quality aluminium alloy construction, sturdy and well-made
- • Best for: Road and mountain bikers with 68–73mm BSA shell and 24mm spindle cranks
- • Not ideal for: Frames with non-BSA shell widths or cranks using spindle diameters other than 24mm
Made from high-quality aluminium alloy for 68–73mm shell widths. Designed to work with 24mm crank spindles for road and MTB use.
Quiet, fluid pedalling – thanks to precision sealed bearings
Precision bearings sit behind CNC-sealed threads that keep contaminants out, enabling smooth rotation and reduced noise over extended use. Bearings and seals work together to maintain low-friction operation even in wet or muddy conditions.
Smooth rotation reduces drivetrain noise and makes pedalling feel more efficient, especially on longer rides. Less frequent bearing maintenance required compared with unsealed alternatives.
Straightforward fit-up – with marked cups and spacers for easy installation
Marked cups and spacers simplify alignment during assembly, while a standard BSA thread form matches common 68–73mm shell widths. The design supports simple installation, removal and replacement for home mechanics.
Home fitters can install and adjust the unit quickly without specialist tools, cutting workshop time. Clear markings reduce the risk of incorrect spacing during setup.
Reduced ingress and longer life – with CNC precision seal thread and rubber gaskets
CNC-machined seal threads form a tight interface that blocks dirt, mud and water from reaching internal bearings. The package includes rubber gaskets to bolster the seal and maintain bearing performance.
Better protection against the elements helps bearings last longer and keeps performance consistent across seasons. Gaskets allow straightforward resealing when needed.
✨ The 4 Key Reasons for kefeimumu Bike Bottom Bracket
- Superb finish - Improves visual fit with components and resists installation wear
- Smooth bearings - Reduce drivetrain noise and improve pedalling efficiency on rides
- Marked cups and spacers - Simplify alignment for quick home installation and adjustment
- Spare rubber gaskets included - Allow resealing without buying extra parts
📋 Technical Details at a Glance
- Category: Bottom Bracket
- Brand: kefeimumu
- Fit (BB shell width): 68–73mm
- Outer diameter: 44mm
- Crank spindle diameter: 24mm
❓ Frequently Asked Questions
Q: Will this bottom bracket fit my 68mm shell?
A: Yes. Designed to fit bottom bracket shell widths from 68mm to 73mm, so a 68mm shell falls within the supported range.
Q: Is it compatible with my 24mm crank spindle?
A: Yes. Intended for crank spindles with a 24mm diameter, so confirm crank spindle size before fitting.
Q: Are seals and gaskets included to protect the bearings?
A: Yes. CNC precision-sealed threads are used and the package includes three rubber gaskets to help block dirt, mud and water.
🏆 Our Verdict
Suitable for riders and home mechanics who need a straightforward 68–73mm BSA threaded replacement compatible with 24mm cranks. Sealed threads, precision bearings and included gaskets combine to deliver quiet pedalling and lower maintenance. A well made, cost-effective upgrade that should deliver reliable service over time.
