Super narrow lightweight 11-speed HG-EV symmetrical design chain for smooth shifts and maximum durability. Outer plate design has been developed to reduce the chance of chain suck. Sil-Tec surface treatment technology (PTFE plating) on inner links that is smooth running and increases durability. The inner plate has been developed for better contact with gears providing smoother shifting under high load, giving efficient pedalling, increased rigidity and near silent running.