Tri-pack™ ClutchFine tune input at the shifter and set chain tension accordingly with Tri-Pack™ Clutch technology. This advanced chain retention system provides instant engagement and long-lasting chain dampening throughthe use of a one-way roller bearing and composite friction plates. Housed in the lower knuckle, TriPack™ is both user-friendly and easy to maintain, allowing riders to adjust clutch force* with a simpleTorx® -equipped multi-tool.Forged ConstructionImpact resistance is greatly improved by way of forging — a key manufacturing process that strengthens critical components. Tested at the premier freeride event of the season -- Red Bull® Rampage-- this new construction has proven itself capable of performing at the highest levels and comes standard on all second-generation Box derailleurs.Pivot-tech™Impact resistant, spring-loaded cable stay keeps cable, housing & you out of harm’s way.