Box Two Prime 9 Chain Nickel Wide Box Two rear derailleurs are

Box Two rear derailleurs are still optimized for 11-50t cassettes and offer durability and performance for the most demanding terrain

Including a Limited Slip Clutch

The Box Three Rear Derailleur simplifies the features found on the Prime 9 Box One and Two rear derailleurs making for a fully featured wallet friendly rear derailleur

although you'll forgo the hinged clamp and die-cast structure

Box Two Prime 9 Chain Nickel Wide Box Two rear derailleurs areThe Box Two chain's nickel plating adds both corrosion and wear resistance. All Prime 9 chains have chamfered shifting edges, solid plates and solid pins to safeguard durability. Our unique inner link spacing is engineered to grab those modern wide narrow chainrings. We chose to modernize the 9 speed platform due to the chain's spirited reputation. They also work well with BMX 3 32" Chainrings and Cogs. SUPPORT MATERIAL Prime 9 Technology View Prime 9