Your Brompton match
Based on your answers, your match is
Runner-up
View →Not seeing the right fit?Retake the quiz →

BENEFITS
Rewards
Earn 65 points with this purchase
No Sales Tax
Sales Tax Vacation! No Travel Required
Description
High-Performance 12-Speed Chain with X-Bridge Technology
The KMC X12 is a precision-engineered 12-speed chain designed to meet the demanding requirements of Shimano, SRAM Eagle, SRAM Eagle AXS, and Campagnolo drivetrains. Built with elaborately designed and manufactured Double X-Bridge technology, precisely chamfered plates allow smooth propulsion and perfect gear changes in all driving situations across mountain, road, gravel, and cyclocross applications.
Available in multiple finishes including Silver, Aurora, Ti Gold (Titanium Nitride), Ti Gold/Black, and EPT (EcoProTeQ), each version offers specific benefits for performance and durability. The Ti Gold finish features a titanium nitride coating with an ultra-smooth surface and extreme durability, while the EPT coating provides non-toxic rust protection that doubles resistance compared to standard treatments, delivering maximum rust resistance, low noise, and great appearance.
Engineered for Precision Shifting
- Double X-Bridge construction increases shifting precision and speed for smooth, fast, and accurate performance.
- Inner and outer chamfering with ramps specifically engineered to engage chain rings and cassettes quickly.
- Precisely chamfered plates allow smooth propulsion and perfect gear changes in all driving situations.
- Compatible with SRAM Eagle, SRAM Eagle AXS, Shimano, and Campagnolo 12-speed systems.
- Not compatible with SRAM eTAP AXS Flattop chains (requires dedicated Flattop chain design).
- Suitable for MTB, road, gravel, and cyclocross applications.
- 126-link length provides compatibility with a wide range of drivetrain configurations.
- Lightweight design at 234 grams reduces rotating mass for improved efficiency.
- Hollow pins shave grams in every link for super-light performance.
- High pin power construction ensures strength while maintaining low weight.
Premium Finish Options
- Silver (NP/NP): Standard nickel-plated finish for reliable performance and corrosion resistance.
- Aurora: Premium multi-color iridescent coating for distinctive appearance and enhanced protection.
- Ti Gold (Ti-N): Titanium nitride coating with ultra-smooth surface, extreme durability, and corrosion resistance in signature golden yellow color.
- Ti Gold/Black: Titanium nitride and black coating combination for unique aesthetics and high performance.
- EPT (EcoProTeQ): Non-toxic coating that doubles rust resistance compared to standard treatment, with very smooth finish, low noise, and maximum rust protection.
Details
UPC / Part Numbers
| Option | SKU | UPC |
|---|---|---|
| Default | CH5045 | 766759712303 |