The Box Components Three Prime 9-speed chain is polished and chemically treated for corrosion resistance. All Box Components Prime 9 chains have chamfered corners for easy shifting, and solid plates and rivets to guarantee durability. The internal width of the Box Components Three Prime 9 chain is specifically designed to ensure perfect chain retention on wide/narrow single chainrings. The Box Components Three Prime 9 chain thus combines the durability of traditional 9-speed chains with the advantages of the latest transmissions. The Box Components Three Prime 9 chain is compatible with all Prime 9 transmissions except the Box Four range.
