T47A-DUB Bicycle Bottom Bracket 77-83mm Road Mtb 28.99mm Crank Ceramic Central Movement Fit for SRAM dub Bike accessories thread
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Specifications
- Brand Name
- KACTUS TECH
- High-concerned chemical
- None
- Origin
- Mainland China
- Material
- Aluminum/Alloy
- Model Number
- T47A-DUB
- Use
- Road Bicycles
- Type
- Bicycle Bottom Brackets
- Brand
- Kactus Tech
- Name
- Ceramic Bottom Brackets
- Fit Bicycle
- Both MTB and Road Bicycle Frame
- Bearing
- Ceramic Bearing
- Ceramic Beads
- G3 Silicon Nitride
- Five-way Width
- 77mm-83mm
- Thread
- M47*1
- Crank Axis
- 28.99mmX28.99mm
- Fit for
- Factor Sram etc 28.99mm Cranksets
- Weight
- about 103g
Product Description
Model Number:T47A-DUB (77-83mm)↓↓↓
Color: Black
Material: Aluminum Alloy,Ceramic Palin
Weight : About 103g(Weight does not include accessories)
Shell width: 77mm~83mm
Applicable Axis: φ28.99mm*φ28.99mm
Thread: M47*1
Fit for : Fit for SRAM dub crankset and other brand of crankset with
shaft diameter 28.99mm.
1.Ceramic bearings are installed in cups.
2.High quality G3 silicon nitride ceramic beads and hardened-steel races.
3.G3 Silicon nitride ceramic beads ,it highlights the higher strength and impact
resistance characteristics of Si3N4, making it better than metal bearings, Secondly,
their better wear resistance and heat resistance,light weight and smoothness,
making the cranksets smoother during rotation. Be loved and recommended by
cycling enthusiasts.
4.Low operating noise.
Bottom Parts
Lightweight aluminum alloy is not easily deformed.
Light-weight Design
The shell is made of high-strength aluminum alloy material, integrally formed, and
anodized, which increases the hardness and wear resistance of the product and
extends the service life of the product.
Product Packaging
Note: Due to different batches, the factory will replace the outer packaging of
the product, please refer to the actual receipt!
Pros & Cons
Pros
- Ceramic bearings reduce friction for efficient pedaling
- Lightweight 103g aluminum for performance builds
- Wide 77-83mm compatibility for various frames
- Precise fit for SRAM DUB 28.99mm cranks
Cons
- Thread-specific M47*1 limits universal use
- Weight excludes accessories, actual install may add more
- Ceramic may require careful maintenance
- China origin potential for longer shipping
Common Questions
What thread and width does the T47A-DUB bottom bracket fit?
M47*1 thread, 77-83mm shell width for road/MTB frames.
Is this bottom bracket compatible with SRAM DUB cranks?
Yes, fits 28.99mm DUB axis like SRAM, Factor, and similar cranksets.
What material and bearing type for durability?
Aluminum alloy body with G3 silicon nitride ceramic bearings for smooth, low-friction spin.
How much does the KACTUS TECH bottom bracket weigh?
Approximately 103g, lightweight for performance upgrades.
Does installation require special tools?
Standard bottom bracket tools; fits both MTB and road bikes from Mainland China shipping.
Product information last updated on March 24, 2026