SUMC 12 Speed Chain MTB Road Bike Diamond serie Chain 126L Ultralight SX12SL Color Mountain Bicycle 12V Chains for Shimano Sram
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Specifications
- Brand Name
- ZOAO
- Origin
- Mainland China
- High-concerned chemical
- None
- Model Number
- SX12
- Material
- high strength composite metal
- Plating
- Titanium Nitride
- Link
- 126L
- Compatible
- 12 speed Transmission system
- Service life
- 6000km+
Product Description
SUMC SX12 12-Speed Road/Mountain Bike Chain
Brand:SUMC
Model: SX12 SX12EL SX12SL
Dimensions: 1/2" X 11/128"
Comes with Magic Button
Switching steps: 12-speed
Directional design: No
Connector: Missing Link
Links: 126 Links
Color：Silver(Ti-N) Gold(Ti-N) Rainbow(Ti-N) Red/Black(Diamond) Black/Gold(Diamond)
Features -SX12
Hi-Performance
For Campagnolo,Shimano and SRAM 12-speed derailleur systems
Use: MTB, Road Bike, Trekking,AM,DH.
Service life ：6000 KM +
Cleaning miles: Every 500 KM
Real man， Love the pink！hahahha~
SX12SL Diamond chain. The surface coating of the chain adopts the extremely hard synthetic material TiCN (titanium nitride), which is usually used as the coating of cemented carbide structures such as titanium alloy and steel to improve the surface properties. It has the highest lubricity of all tin coatings, which is equivalent to the unique properties of natural diamond. It has low friction coefficient, high hardness and high corrosion resistance.
The SX12 12-speed chain demonstrates the SUMC design's ability to focus on retaining the components of the top chain's many technological advancements. Both inner and outer panels feature chamfered edges for improved shifting and chain articulation. In addition to performance features, SUMC's mushroom riveting technology increases the strength of the pins and makes the chain stronger. SX12 also has a titanium nitride plated surface for improved wear and corrosion resistance. The actual test stable service life is more than 6000 kilometers! The SX12 actually weighs 264 grams (uncut/126 links and lacks link connectors) and costs 2/3 the price of other manufacturers' high-end 12-speed chains. A true balance of performance, weight, strength and price. This makes the SUMC SX12 Silver one of the chain choices for SRAM and Shimano 12-speed drivetrains.
Pros & Cons
Pros
- Titanium nitride plating provides excellent corrosion resistance and durability for long-term use
- Fully compatible with 12-speed Shimano and SRAM transmission systems for smooth shifting
- 126-link length fits most standard mountain and road bikes right out of the box
- Rated for 6000km+ of use, offering a longer service life than budget bike chains
Cons
- Only offered in a small selection of colorways, limiting customization options
- Ships from Mainland China which may result in longer delivery times for customers outside Asia
- Only compatible with 12-speed bicycle drivetrains, so it cannot be used with 11-speed or older systems
- Titanium nitride plating may develop a dull finish over time with frequent cleaning, though this does not impact performance
Common Questions
What material is this bike chain made of?
This bike chain is constructed from high-strength composite metal, with a titanium nitride plating for added durability and corrosion resistance.
Is this chain compatible with 12-speed Shimano and SRAM transmission systems?
Yes, this SUMC SX12 chain is designed to be fully compatible with 12-speed Shimano and SRAM drivetrains.
How many links are included in this bike chain?
This chain comes pre-assembled with 126 links, suitable for most standard mountain and road bikes.
What is the expected service life of this bike chain?
This chain has a rated service life of over 6000km, offering long-lasting performance for regular riders.
Does this bike chain include a connector for easy installation?
Yes, this chain comes with a missing link (magic button) connector for quick and tool-free installation.
Product information last updated on March 6, 2026