The HG901 chain 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 gearshifts for thousands of kilometres. Shimano has equipped the premium chain for 11-speed systems with special asymmetrical HG-X11 outer and inner plates. This favours a particularly safe guidance of the chainring and at the same time enables more shifting comfort than before. However, it's imperative to make sure during installation that the CN-HG901 is mounted in the correct, fixed running direction.
Thanks to Shimano's new Sil-Tec coating, the HG901 chain is extremely low friction and durable. The somewhat higher purchase price is relativised with each kilometre ridden. A real recommendation for demanding frequent riders.
The real advantage of the 11-speed drive is that the entire transmission ratio bandwidth is available without having to sacrifice the usual rhythm. Dyna-Sys11 ensures an optimal rhythm with "Rhythm Step" courses in the most frequently used range, both on the level and on the ascent. Drive efficiency is a key performance indicator for the powertrain. Dyna-Sys11 means more speed for 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 sprocket 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 marking is the outside.