The HG901 chain with chain lock for 11-speed drivetrains is Shimano's premium chain for Dura Ace and XTR drivetrains.
Both off-road and on the road, it delivers silky smooth yet precisely defined gear changes for thousands of kilometres. Shimano has equipped the premium chain for 11-speed drivetrains with special asymmetrical HG-X11 outer and inner link plates. This promotes particularly safe guidance of the chainring and allows more shifting comfort than before. However, it’s essential to observe this during installation: the CN-HG901 has a fixed running direction in which it must be mounted.
Thanks to Shimano's new Sil-Tec coating, the HG901 chain is extremely low-friction and durable. The slightly higher purchase price thus becomes relative with every kilometre driven. A real recommendation for demanding frequent riders.
The real advantage of an 11-speed drivetrain is that the entire range of gear ratios is available without having to give up your usual rhythm. Dyna-Sys11 ensures an optimal rhythm both on the flat and uphill - with "Rhythm Step" gears in the most frequently used range. Drive efficiency is a key performance indicator for the drivetrain. Dyna-Sys11 means more speed with the same effort.
SIL-TEC is Shimano's extremely low-friction surface treatment. SIL-TEC is a superior, advanced coating process that improves system performance by using embedded fluorine particles. SIL-TEC products run smoother and show less wear under all conditions.
The CN-HG901 chain has an asymmetrical design. Therefore, the running direction must be observed when mounting. The specially shaped plates optimise the engagement on the pinion and lead to even smoother shifting processes even under load. To save weight, these chains have recesses on the inner plates and hollow rivet pins. The side with the mark is the outside.