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-HG701 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. The side with the marking is the outside.