Ultra-link connecting system. Constant, extremely high performance levels over time. 5.15 mm wide. Pins aligned with the external links.
Description
In order to guarantee impeccable, reliable performance even with bigger cassettes, precision shifting by front and rear derailleurs has seen design of a 12-speed chain entailing huge research and development efforts to make it as reliable and long-lasting as an 11-speed chain, despite being narrower than the latter. The new 12-speed Chorus groupset benefits from a new Chorus 12 chain that ensures the same reliability and the same performance levels as that of the Super Record category, its 110 links weighing only 241 grams.
Characteristics
Width from 5.15 mm Faster lighter shiftiing Extremely high performance levels and durability over time Pins aligned with the external surface Smoothness and precision Unchanged resistance to wear and tear A lighter, narrower chain than the 11-speed, but just as durable Optimized design Optimum performance in line with the design of the teeth on the sprockets and crowns Ultra-link System Top-level smoothness and less dispersion.
Specifications

Weight
243 grams (110 links)